What happens when the action force of a bat strikes a baseball?

The reaction force accelerates the bat in a direction opposite that of the ball.

The reaction force accelerates the bat in a upward direction.

The reaction force accelerates the bat in a downward direction.

The reaction force accelerates the bat in the same direction as that of the ball.

The electron will move from the first energy level to the second energy level.

The energy level closest to the nucleus is the first energy level, and when an electron absorbs a photon, it absorbs the energy in the photon. This absorption causes the electron to move from the first to second energy level.

Answer:

The correct answers are options B and C, that is, it pushes on all the objects that are on the surface of the Earth, and it can be measured in kilopascals or atmospheres.

Explanation:

The atmospheric pressure or the barometric pressure refers to the pressure found inside the Earth's atmosphere. With the increasing height, the atmospheric pressure decreases. In meteorology, the barometer is an instrument, which is used to find the atmospheric pressure. Atm or atmospheric pressure is the force per unit region by the weight of air above that location, and kPa or kilopascal refers to a metric system pressure unit, which is equivalent to 1000 force of Newton per square meter.

Answer:

4.563 times more energy.  

Step-by-step explanation:

The ionization energy of hydrogen is 1312.0 kJ·mol⁻¹.

The second ionization energy of Li (the first ionization energy of Li⁺) is 7298.1 kJ·mol⁻¹.

Ratio = 7298.1/1312.0

Ratio = 5.563

The ionization energy of Li⁺ is 5.563 times as much as, or 4.563 times more than, the ionization energy of H.

Answer 1) [tex]Pb+AlCl_3\rightarrow [/tex] no reaction

As lead lies lower in reactivity series, it is less reactive than Aluminium. It will not be able to displace aluminium from its salt and hence no reaction occur. Thus the given statement is false.

2) [tex]Na_3PO4+3KOH\rightarrow 3NaOH+K_3PO_4[/tex], because K retains the same charge throughout the reaction.

A balanced chemical reaction is one in which the number of atoms on both sides of a chemical equation are same. Also K has an oxidation state or charge of +1 in [tex]KOH[/tex] as well as [tex]K_3PO_4[/tex]

3) [tex]Zn+H_2SO_4\rightarrow ZnSO_4+H_2[/tex]

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus zinc can easily lose electrons as compared to hydrogen and result in the formation of zinc sulfate and hydrogen.

[tex]Ba(OH)_2+H_2SO_4\rightarrow BaSO_4+2H_2O[/tex]: is a double displacement reaction in which ion exchange takes place.

[tex]2Mg+O_2\rightarrow 2MgO[/tex]: It is a synthesis reaction as two reactants combine to give a single product.

[tex]H_2O+CO_2\rightarrow H_2CO_3[/tex]: It is a synthesis reaction as two reactants combine to give a single product.

4) [tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex] Sodium metal reacts with water to produce hydrogen gas: A single replacement reaction takes place because sodium is more reactive than hydrogen.

Sodium easily lose electrons than hydrogen and get oxidized to [tex]Na^+[/tex] in NaOH and [tex]H^+[/tex] get reduced to give [tex]H_2[/tex]

5) A single replacement reaction is a reaction in which one element replaces a similar element within a compound - False

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

A double displacement reaction is one in which exchange of ions take place.

6) Metal + Ionic compound : It is a single replacement reaction, and the cations in the two ionic compounds are different.

Example: [tex]2K+MgCl_2\rightarrow 2KCl+Mg[/tex] where K is a metal and [tex]MgCl_2[/tex] is an ionic compound. K being more reactive than Mg, displaces it from its salt solution.

Final answer:

The correct answers are False for Question 1 as Pb cannot replace Al in AlCl₃, the balanced equation for Na₃PO₄ and KOH is Na₃PO₄+ 3KOH → 3NaOH + K₃PO₄, and Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of a single replacement reaction. True for Question 5, the nature of the single replacement reaction involves different cations.

Explanation:

For question 1, the statement is False. Lead (Pb) cannot replace aluminum (Al) in AlCl₃ because, according to the activity series, lead is less reactive than aluminum. For Pb to replace Al, Pb must be higher on the activity series.

For question 2, the correct balanced equation is Na₃PO₄ + 3KOH → 3NaOH + K₃PO₄, as potassium (K) retains the 1+ charge throughout the reaction.

For question 3, Zn + H₂SO₄ → ZnSO₄ + H₂ is an example of a single replacement reaction, where zinc (Zn) replaces the hydrogen (H).

For question 4, the reaction is a single replacement reaction that takes place because sodium (Na) is more reactive than hydrogen (H).

For question 5, the statement is True. A single replacement reaction involves one element replacing a similar element within a compound.

For question 6, the correct answer is It is a single replacement reaction, and the cations in the two ionic compounds are different.

From the balanced equation  3 moles of oxygen are produced from 2 molecules of potassium chlorate.

So the number of moles of oxygen from 1 mole of chlorate = 3/2 = 1.5.

By proportion  the number of moles produced from 6 moles of  the chlorate =

= 6 * 1.5  = 9 moles  (answer).

Considering the reaction stoichiometry, the correct answer is the last option: the total number of moles of O₂ produced by the decomposition of 6.0 moles of potassium chlorate is 9 moles.

The balanced reaction is:

2 KClO₃ → 2 KCl + 3 O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Then you can apply the following rule of three: if by stoichiometry 2 moles of KClO₃ produce 3 moles of O₂, 6 moles of KClO₃ will produce how many moles of O₂?

[tex]amount of moles of O_{2}=\frac{6 moles of KClO_{3} x 3moles of O_{2}}{2moles of KClO_{3} }[/tex]

amount of moles of O₂= 9 moles

Finally, the correct answer is the last option: the total number of moles of O₂ produced by the decomposition of 6.0 moles of potassium chlorate is 9 moles.

Learn more:

False, photons emit ir in other ways.

The largest number of the four options is 1.8 X 10-2

You have it in scientific notation.

1.80 X 10-6  = 0.00000180

1.80 X 10-4   = 0.000180 (bigger, or "less small", than the former one)

So

1.8 X 10-2      = 0.0180. As you see. The "less small", or the biggest one of them all.

As you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

If you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 X (10)2 = 180

So. If you have negative exponent in Scientific notation, move the dot toward left. If it is positive, toward right as many times the exponent tells you.

Answer:

1.80 x 10-2

Explanation:

Hey there!

The Buoyant force is going to be equal to the weight of the water displaced and it would be like this 100 L(9.8 N/L) = 980 N.

Hope this helped and mind marking me brainliest. Thank you!

The  true  about element in  period or  horizontal  row  of periodic table is

Each  element  has one more outer electron than the element before it. (answer B)

 Explanation

 In periodic table  there are four horizontal rows(periods) that is  period 1,2,3 and 4.

Across the period each element has one more electron than element before it.

For example  Na and Mg which  are in  periodic 3.

Na  has 2.8.1  or [Ne] 3s¹ electron configuration  while Mg has  2.8.2  or [Ne] 3S² electron configuration.

Since Mg has 2   outer electrons  while Na has 1 outer electron, Mg has more electron than Na.

The  moles  of carbon  that  are in the sample  of 21.45  moles of heptane(C₇H₁₆)  is 150.15   moles

  calculation

 moles  of carbon = moles  of  heptane  × number of C atom

 number of C atom  in heptane = 1 ×7  = 7 atoms

moles is therefore = 21.45 moles ×  7 =150.15  moles

Answer: The number of moles of carbon atom that the given amount of heptane is 150.15 moles

Explanation:

We are given:

Moles of heptane = 21.45 moles

The chemical formula for heptane is [tex]C_7H_{16}[/tex]

1 mole of heptane contains 7 moles of carbon atom and 16 moles of hydrogen atom

So, 21.45 moles of heptane will contain [tex](7\times 21.45)=150.15moles[/tex] of carbon atom

Hence, the number of moles of carbon atom that the given amount of heptane is 150.15 moles

ANSWER

It is an acid because it increases the concentration of hydronium ions.

HCl is an acid. When HCl is added into water, it undergoes the following dissociation:

  HCl + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).

The Arrhenius definition defines acids as subtances that release H⁺(aq) when put in water. This H⁺(aq) ions that HCl releases reacts with water to form H₃O (hydronium), leading to an increase in concentration of H₃O. 

The statement which is true about HCl is that it is an acid because it increases the concentration of hydronium ions. Thus, the correct option for this question is D.

HCl stands for hydrochloric acid. It is an inorganic chemical that has a strong corrosive acid with a chemical formula HCl. It is also known as hydrogen chloride or muriatic acid. When hydrogen chloride is dissolved in water HCl is formed.

HCl is a strong acid. When HCl is added to water, it significantly undergoes the dissociation reaction that is as follows:

According to Arrhenius's definition, it defines that acid is a substance that liberates H⁺(aq) when put in water. These H⁺(aq) ions that HCl releases typically react with water in order to form H₃O (hydronium), which leads to an enhancement in the concentration of H₃O.

Therefore, the statement which is true about HCl is that it is an acid because it increases the concentration of hydronium ions. Thus, the correct option for this question is D.

To learn more about Hydrochloric acid, refer to the link:

https://brainly.com/question/24586675

#SPJ5

A CH₄ molecule has four C-H bonds. Each of the C-H bonds is weakly polar. However, the molecule has a tetrahedral shape. The shape itself is symmetric.

As a result, charges on the four C-H bonds have a symmetric distribution. They cancel out within the molecule. Overall, the molecule is nonpolar.

The correct statement describing the charge distribution and the polarity of a [tex]{\text{C}}{{\text{H}}_{\text{4}}}[/tex] molecule is as follows:

[tex]\boxed{{\text{The charge distribution is symmetrical and the molecule is nonpolar}}}[/tex].

Further Explanation:

The most important factor in determining the polarity of a bond is the difference in the electronegativity values of the bonded atoms. If there is an electronegativity difference between the bonded atoms, the molecule is said to be polar and vice-versa.

Another factor that plays a significant role in governing the bond polarity is symmetry. If a molecule has symmetry or symmetrical charge distribution, it is said to be nonpolar due to the cancellation of the individual dipole moments present in the molecule and vice-versa.

 consists of one carbon atom and four hydrogen atoms. In this molecule, carbon acts as the central atom and four hydrogen atoms are placed around it in symmetrical positions so the net dipole moment becomes zero. As a result, this molecule is non-polar and has a symmetrical charge distribution (For structure, refer to the attached image).

Learn more:

Answer details:

Grade: High School

Chapter: Ionic and covalent compounds

Subject: Chemistry

Keywords: polar, nonpolar, symmetry, dipole moment, zero, symmetrical charge distribution, carbon, hydrogen, CH4.

1. Cycloalkane contains at least one ring of three or more carbon atoms joined by single bonds.

2. An Alkene contains at least one double bond between carbon atoms.

3. A Saturated hydrocarbon is an acrylic hydrocarbon that contains only single bonds.

4. An aromatic hydrocarbon contains one or more planar, six-membered rings of carbon atoms with delocalized pi-bonding throughout the ring.

5. Alkane contains only single bonds.

6. Alkyne contains at least one triple bond between carbon atoms.

To learn more about structural features, refer to:

#SPJ2

Answer: For a. Mass number for the particle is 0.

For b. The charge on the particle is -1.

For c. Another name for [tex]\beta [/tex]- particle is electron.

Explanation:

Beta- minus decay is the decay process in which beta-particle is emitted. The mass number of the nuclei remains same and the mass number of the particle is 0. The charge on the particle is -1 and the emitted particle is also called as electron.

[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta[/tex]

For a. The mass number for the particle is 0.

For b. The charge on the particle is -1.

For c. Another name for [tex]\beta [/tex]- particle is electron.

1.) The modern atomic theory has been updated over the years..

the correct option is:

C. The changes make the theory stronger because it has been tested and edited multiple times, making it more durable.        

2. In Rutherfords experiment,Based on Thomson's plum pudding model of the atom, what did Rutherford expect to happen;

A. All the alpha particles would be deflected by the foil because of the even distribution of mass and charge throughout the atom.

According to Thomson's plum pudding model of the atom the positive and negative charges are evenly distributed.

Changes in atomic theory show its strength through rigorous testing and refinement, and Rutherford's experiment disproved the plum pudding model by showing atoms have a dense nucleus since not all alpha particles passed straight through the gold foil.

1. The changes in the modern atomic theory illustrate the dynamic nature of scientific exploration. Option C is the correct answer, as these changes make the theory stronger because it has been tested and edited multiple times, making it more durable. Scientific theories evolve over time through experimentation and observation, and the ability to adapt and refine a theory in the light of new evidence is a sign of its robustness.

Regarding Rutherford's famous experiment, based on Thomson's plum pudding model of the atom, Rutherford expected that the alpha particles would pass essentially straight through the foil with only slight deflection. This is because the plum pudding model posited that atoms had an even distribution of mass and charge.

2. The correct answer is Option B: All the alpha particles would pass straight through the foil because of the even distribution of mass and charge throughout the atom. However, the unexpected result of alpha particles being deflected at large angles or even straight back led to the conclusion that Thomson's model was incorrect and that atoms have a dense, positively charged nucleus at their center.

Answer:

(b) Both have the same number of valence electrons.  

Step-by-step explanation:

We find the most striking chemical similarities between two Main Group elements when they are in the same Group of the Periodic Table.

Elements in the same Group have the same number of valence electrons.

(a) is wrong, because elements in the same group have different masses.

(c) is wrong, because atoms with the same number of protons belong to the same element.

(d) is wrong, because elements in the same Group must be in . different Periods.

Your answer to this question would be D. all of the above. Hope that my answer can help you and good luck!

He could be blindfolded and know which was his and which was his sister's. All he would need to do is pick them both up and if they were too big then pick them up one at a time. The lumber might make it harder to tell, but this is a question about physical properties.

So there is a change in mass which for the purpose of this question should be  quite different. His sister's ought to be much lighter than his. He would find it easier to pick up.

the answer is desity

Answer : The enthalpy change for converting 1 mole of ice at [tex]-25.0^oC[/tex] to water at [tex]90^oC[/tex] is, 7.712 KJ

Solution :

Process involved in the calculation of enthalpy change :

[tex](1):ice(-25^oC)\rightarrow ice(0^oC)\\\\(2):ice(0^oC)\rightarrow water(0^oC)\\\\(3):water(0^oC)\rightarrow water(90^oC)[/tex]

Now we have to calculate the enthalpy change.

[tex]\Delta H=[m\times c_{ice}\times (T_2-T_1)]+\Delta H_{fusion}+[m\times c_{water}\times (T_3-T_2)][/tex]

where,

[tex]\Delta H[/tex] = enthalpy change

m = mass of water = [tex]1mole\times 18g/mole=18g[/tex]

[tex]c_{ice}[/tex] = specific heat of ice = 2.09 J/gk

[tex]c_{water}[/tex] = specific heat of water = 4.18 J/gk

[tex]\Delta H_{fusion}[/tex] = enthalpy change for fusion = 6.01 KJ/mole = 0.00601 J/mole

conversion : [tex]0^oC=273k[/tex]

[tex]T_1[/tex] = initial temperature of ice = [tex]0^oC=273k[/tex]

[tex]T_2[/tex] = final temperature of ice = [tex]-25^oC=273+(-25)=248k[/tex]

[tex]T_3[/tex] = initial temperature of water = [tex]0^oC=273k[/tex]

[tex]T_4[/tex] = final temperature of water = [tex]90^oC=273+90=363k[/tex]

Now put all the given values in the above expression, we get

[tex]\Delta H=[18g\times 2.09J/gK\times (273-248)k]+0.00601J+[18g\times 4.18J/gK\times (363-273)k][/tex]

[tex]\Delta H=7712.106J=7.712KJ[/tex]     (1 KJ = 1000 J)

Therefore, the enthalpy change for converting 1 mole of ice at [tex]-25.0^oC[/tex] to water at [tex]90^oC[/tex] is, 7.712 KJ

The total enthalpy change for converting 1.00 mol of ice at -25.0 °C to water at 90.0 °C is calculated by first warming the ice to 0°C, melting the ice at 0°C to water, and finally heating the water to 90°C. Summing these steps gives a total enthalpy change of 11.84 kJ.

The enthalpy change for the transition of ice to water involves both warming of the ice and heat for fusion. Firstly, we must warm the ice to 0.00 °C from -25.0 °C using the formula q=m*C*ΔT. Given the specific heat of ice is 2.09 J/g°K, mass is assumed to be 1.00 mol which is equivalent to 18g (1 mol of H2O = 18g), thus the heat required is ((18g*-25.0°C)*(2.09 J/g°K)) = -940.5 J or -0.94 kJ.

Next, we need to convert the ice at 0.00 °C to liquid water at 0.00 °C using enthalpy of fusion (ΔHfus) giving 1.00mol * 6.01 kJ/mol = 6.01 kJ. Then, we need to heat the water from 0.00 °C to 90.0 °C, q = (18.02 g)*(90.0°K)*(4.18 J/g°K) = 6766 J or 6.77 kJ.

Summing all these values gives the total enthalpy change for this process as (-0.94 kJ + 6.01 kJ + 6.77 kJ) = 11.84 kJ. Note, that we consider the absorbed heat as positive while heat given out (as in the initial warming of ice) is negative in accordance with the convention in thermodynamics.

https://brainly.com/question/32882904

#SPJ11

Final answer:

Sodium acetate (NaCH₃CO₂) is a basic salt formed from the reaction of acetic acid, a weak acid, with NaOH, a strong base. It reacts with water to produce hydroxide ions, causing the solution to be slightly basic.

Explanation:

When acetic acid, a weak acid, reacts with NaOH, a strong base, the resulting product is a salt called sodium acetate (NaCH₃CO₂). This compound is considered a basic salt due to the hydrolysis of the acetate ion in water. The acetate ion (C₂H₃O₂⁻) reacts with water to produce hydroxide ions (OH⁻), which make the solution slightly basic. In the process, sodium acetate (NaC₂H₃O₂) is formed along with water. The equation for this neutralization reaction is:

CH₃CO₂H (aq) + NaOH (aq) → NaCH₃CO₂ (aq) + H₂O (aq)

BaO..........................

The other reactant in the given reaction is [tex]\boxed{{\text{BaO}}}[/tex].

Further explanation:

A chemical reaction involves the rearrangement of the constituents of reactants to form new substances called products. Chemical reactions can be classified into the following five types:

1. Combination reactions

The chemical reactions where the combination of two or more reactants yields a single product are known as combination reactions. These are normally exothermic in nature.

Examples of combination reactions are as follows:

(a) [tex]{{\text{H}}_2} + {\text{C}}{{\text{l}}_2} \to {\text{2HCl}}[/tex]  

(b) [tex]{\text{CaO}} + {{\text{H}}_2}{\text{O}} \to {\text{Ca}}{\left( {{\text{OH}}} \right)_2}[/tex]  

2. Decomposition reactions

In these types of reactions, two or more products are produced from a single reactant. These are usually endothermic in nature.

Examples of decomposition reactions are as follows:

(a) [tex]2{{\text{H}}_2}{{\text{O}}_2} \to 2{{\text{H}}_2}{\text{O}} + {{\text{O}}_2}[/tex]  

(b) [tex]2{\text{NaCl}} \to {\text{2Na + C}}{{\text{l}}_2}[/tex]  

3. Displacement reactions

In these reactions, one of the reactants replaces another one due to its high reactivity. These reactions are also called replacement reactions.

Examples of displacement reactions are as follows:

(a) [tex]{\text{Cu}} + {\text{AgN}}{{\text{O}}_3} \to {\text{Ag}} + {\text{Cu}}{\left( {{\text{N}}{{\text{O}}_3}} \right)_2}[/tex]  

(b) [tex]{\text{C}}{{\text{l}}_2} + {\text{KBr}} \to {\text{B}}{{\text{r}}_2} + {\text{KCl}}[/tex]  

4. Double displacement reactions

In these reactions, ions of two compounds interchange with each other to form the product.

Examples of double displacement reactions are as follows:

(a) [tex]{\text{N}}{{\text{a}}_2}{\text{S}} + {\text{HCl}} \to {\text{NaCl}} + {{\text{H}}_2}{\text{S}}[/tex]  

(b) [tex]2{\text{KOH}} + {\text{Cu}}{\left( {{\text{N}}{{\text{O}}_{\text{3}}}} \right)_2} \to 2{\text{KN}}{{\text{O}}_3} + {\text{Cu}}{\left( {{\text{OH}}} \right)_2}[/tex]  

5. Combustion reactions

These reactions occur when hydrocarbons are burnt in the presence of oxygen. Here, carbon dioxide and water are produced.

Example of combustion reactions are as follows:

(a) [tex]{\text{C}}{{\text{H}}_4} + {{\text{O}}_2} \to {\text{C}}{{\text{O}}_2} + {{\text{H}}_2}{\text{O}}[/tex]  

(b) [tex]{{\text{C}}_{10}}{{\text{H}}_{14}} + 12{{\text{O}}_2} \to 10{\text{C}}{{\text{O}}_2} + 4{{\text{H}}_2}{\text{O}}[/tex]  

One of the reactants is [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex] and the given reaction is a combination reaction. When BaO reacts with [tex]{{\text{H}}_{\text{2}}}{\text{O}}[/tex], it produces [tex]{\text{Ba}}{\left( {{\text{OH}}} \right)_{\text{2}}}[/tex]. The reaction occurs as follows:

 [tex]{\text{BaO}} + {{\text{H}}_{\text{2}}}{\text{O}} \to {\text{Ba}}{\left( {{\text{OH}}} \right)_{\text{2}}}[/tex]

Therefore the other reactant in the given reaction is found to be BaO.

Learn more:

Answer details:

Grade: High School

Chapter: Chemical reaction and equation

Subject: Chemistry

Keywords: types of reactions, combination reaction, decomposition reaction, double displacement reaction, combustion reaction, BaO, H2O, Ba(OH)2, reactants, products.

Answer:

ΔH = -22 kcal

Step-by-step explanation:

N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + 22 000 cal

Energy is on the right-hand side of the equation, so it is being released by the system.

The thermodynamic convention is that energy going out of a system is negative. Thus,

ΔH = -22 000 cal     Convert to kilocalories

ΔH = -22 kcal

A and B are both wrong, because you divide by 1000 to convert calories to kilocalories.

C is wrong, because the sign must be negative for an exothermic reaction.

The enthalpy change (ΔH) for the reaction N2(g) + 3H2(g) → 2NH3(g), which releases 22,000 calories, is -22,000 kcal.

The question is asking for the enthalpy change (ΔH) of the reaction where nitrogen gas (N2(g)) reacts with hydrogen gas (3H2(g)) to form ammonia (2NH3(g)). The enthalpy change is given in calories, and the options are either positive or negative, indicating an endothermic or exothermic reaction, respectively. The reaction as provided shows that it releases 22,000 cal, which means it's exothermic and ΔH should be negative. Therefore, the value of ΔH for the reaction N2(g) + 3H2(g) → 2NH3(g) is -22,000 kcal.

Answers are:

2. It pushes on all objects that are on Earth’s surface.

3. It can be measured in atmospheres or kilopascals.

Barometric pressure (atmospheric pressure), is the pressure within the atmosphere of Earth

Atmospheric pressure decreases with increasing height, because there are fewer air molecules above a given object.

Barometer is an instrument used in meteorology to measure atmospheric pressure.

Atmospheric pressure (atm) is the force per unit area by the weight of air above that point.  

Kilopascal (kPa) is a metric system pressure unit and equals to 1000 force of newton per square meter.

Atmospheric pressure results from molecular collisions of atmospheric gases.

Answer:

2 & 3

Explanation:

(Answer) The specific copper ion in the compound CuCl is copper (I) ion.

The compound cuprous chloride (CuCl) also known as copper (I) chloride is an ionic compound that contains chloride ion with -1 charge. Therefore, charge on Cu should be +1 because CuCl is a neutral compound as + 1 -1 = 0. For this reason, the specific copper ion in the compound CuCl is copper (I) ion with +1 charge.  

Answer:

Copper (I) ion

Explanation:

Hello,

In this case, for the compound CuCl, the oxidation states are shown below:

[tex]Cu^{+1}Cl^{-1}[/tex]

As there are only one copper and one chlorine, therefore, the name of such copper ion is copper (I) ion as the roman number, I, represent its oxidation state which is +1.

Regards.

Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate. Whether or not such a reaction occurs can be determined by using the solubility rules for common ionic solids. Because not all aqueous reactions form precipitates, one must consult the solubility rules before determining the state of the products and writing a net ionic equation. The ability to predict these reactions allows scientists to determine which ions are present in a solution, and allows industries to form chemicals by extracting components from these reactions.

Answer: 1. Option (A) is the correct answer.

              2. Option (D) is the correct answer.

Explanation:

When there is formation of an insoluble salt due to chemical reaction where two ions combine together in an aqueous solution then this insoluble salt is known as precipitate.

Therefore, chemical precipitation occurs when a product is insoluble and precipitates out of a solution.

Whereas reactants dissolve in precipitation reaction that is why a chemical reaction takes place in which an insoluble product is formed.

For example, [tex]AgNO_{3}(aq) + NaCl(aq) \rightarrow AgCl (ppt) + NaNO_{3}(aq)[/tex]

Here AgCl is the precipitate which is insoluble.

Thus, we can conclude the following.

Answer:

D. 2 NaNO₃

Explanation:

A double displacement reaction is a type of reaction where two reactants exchange ions to form two new compounds. Double displacement reactions typically result in the formation of a product that is a precipitate.

Double displacement reactions take the form:

AB + CD → AD + CB

For the reaction:

Zn(NO₃)₂(aq) + Na₂S(aq) → ZnS(s) + X

If Zn bond with S, NO₃ must be react with Na to produce NaNO₃ that is a soluble salt (Is in aqueous state (aq)). As there are 2 Na and 2 NO₃ the right answer is:

D. 2 NaNO₃

I hope it helps!

Answer:The value of equilibrium constant is [tex]1.0778\times 10^{-2}[/tex].

Explanation:

[tex]I_2\rightleftharpoons 2I^-[/tex]

[tex][I_2]=9.5\times 10^{-2} M,[I^-]=3.2\times 10^{-2} M[/tex]

Expression of an equilibrium constant is given as:

[tex]K_{eq}=\frac{[I^-]^2}{[I_2]}=\frac{3.2\times 10^{-2}\times 3.2\times 10^{-2}}{9.5\times 10^{-2}}[/tex]

[tex]K_{eq}=1.0778\times 10^{-2}[/tex]

The value of equilibrium constant is [tex]1.0778\times 10^{-2}[/tex].

Answer:

B    1.1 × 10^–2

Explanation:

just got it right on the test

Answer:- 6.91 kj of heat is needed.

Solution:- We have solid ethanol at -135 degree C and wants to calculate the heat required to convert it to -50 degree C liquid ethanol.

Melting point of ethanol is -114 degree C. So, it is a three step process. In the first step, -135 degree C solid ethanol changes to -114 degree C solid ethanol.

In second step, -114 degree C solid ethanol melts to -114 degree C liquid ethanol. In third step, -114 degree C liquid changes to -50 degree C liquid.

for the first and third step, there is a change in temperature and so we use the equation, [tex]Q=ms\Delta T[/tex]

where, Q is the heat energy, m is mass in grams, s is specific heat capacity in joule per gram per degree C and [tex]\Delta T[/tex] is the change in temperature.

For second step, there is a phase change so the equation used is, [tex]Q=m\Delta H_f_u_s[/tex]

where [tex]\Delta H_f_u_s[/tex] is the enthalpy of fusion.

Let's do the calculations for the first step:-

[tex]\Delta T[/tex] = -114-(-135) = 21 degree C

m = 25.0 g

s = 0.97 J per g per degree C

[tex]Q_1=25.0g(0.97\frac{J}{g.^0C})(21^0C)[/tex]

[tex]Q_1[/tex] = 509.25 J

let's convert this J to kj

[tex]509.25J(\frac{1kj}{1000J})[/tex]

= 0.509 kj

For the second step we need the moles of ethanol as the enthalpy of fusion is given in kj per mol. Molar mass of ethanol is 46.07 g per mol.

[tex]25.0g(\frac{1mol}{46.07g})[/tex]

= 0.543 mol

[tex]Q_2=0.543mol(\frac{5.02kj}{mol})[/tex]

[tex]Q_2[/tex] = 2.72 kj

For the third step, [tex]\Delta T[/tex] = -50 -(-114) = 64 degree C

[tex]Q_3=25.0g(2.3\frac{J}{g.^0C})(64^0C)[/tex]

[tex]Q_3[/tex] = 3680 J

[tex]3680J(\frac{1kj}{1000J})[/tex]

= 3.68 kj

total Q = [tex]Q_1+Q_2+Q_3[/tex]

total Q = 0.509 kj + 2.72 kj + 3.68 kj

total Q = 6.909 kj

this could be round to 6.91 kj.

So, 6.91 kj of heat is needed to convert -135 degree C solid ethanol to -50 degree C ethanol.

Final answer:

To convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C, approximately 9.161 kJ of heat is needed. This involves heating the solid, melting it, and then heating the liquid to the final temperature.

Explanation:

To calculate the heat needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C, three steps are involved:

Calculate the heat required to raise the temperature of solid ethanol from -135°C to its melting point at -114°C.

Calculate the heat absorbed when solid ethanol melts at -114°C.

Calculate the heat required to raise the temperature of liquid ethanol from -114°C to -50°C.

Using the specific heat of solid ethanol (0.97 J/g·K) for the first part:

q1 = mass x specific_heat_solid x ∆T_solid = 25.0 g x 0.97 J/g·K x (114 K) = 2763 J or 2.763 kJ

For the phase change at the melting point:

q2 = moles x enthalpy_fusion = (25.0 g / 46.07 g/mol) x 5.02 kJ/mol = 2.718 kJ

Finally, for the temperature increase of the liquid phase, using its specific heat:

q3 = mass x specific_heat_liquid x ∆T_liquid = 25.0 g x 2.3 J/g·K x (64 K) = 3680 J or 3.680 kJ

The total heat (q_total) is the sum of q1, q2, and q3:

q_total = q1 + q2 + q3 = 2.763 kJ + 2.718 kJ + 3.680 kJ = 9.161 kJ

So, approximately 9.161 kJ of heat is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C.

3.54 × 10⁵ Pa.

Ammonia NH₃ and oxygen gas O₂ reacts at a one-to-one molar ratio to produce NO and H₂O.

NH₃ + O₂ → NO + H₂O (Balanced)

The vessel will contain

It will contain 0.3841 + 0.2031 + 0.2031 = 0.7903 mol gas particles by the end of the reaction.

[tex]P = n \cdot R \cdot T / V \\\phantom{P} = 0.7903 \times (8.314 \times 10^{3}) \times (273 + 23) / 5.50 \\\phantom{P} = 3.54 \times 10^5 \; \text{Pa}[/tex]

Assuming that the final mixture is an ideal gas, it will exert a pressure of 3.54 × 10⁵ Pa on the container.

We can find the final gas pressure by first converting the given grams of ammonia and oxygen into moles, then using the ideal gas law to calculate the final gas pressure. The final gas pressure inside the vessel after the reaction is approximately 2.54 atm.

In this question, we are asked to find the final gas pressure inside the vessel after a reaction between gaseous ammonia (NH3) and oxygen (O2), yielding Nitric Oxide (NO) gas and water vapor. The reaction is as follows: 4NH3(g) + 5O2(g) => 4NO(g) + 6H2O(g).

First, we need to calculate the number of moles for both ammonia and oxygen. We know that the molar mass of NH3 is 17 g/mol, and for O2 its 32 g/mol. Therefore, we have 10.0g / 17 g/mol = 0.59 mol ammonia and 6.50g / 32 g/mol = 0.20 mol oxygen.

Now apply the ideal gas law (PV=nRT), we will find the final pressure. Note that to use this formula, the temperature needs to be in Kelvin. We convert 23C to 296.15K(23 + 273.15). The total number of moles of gas is the sum of the moles of ammonia and oxygen, and the total volume is given as 5.50L.

So, the total pressure = nRT/V = (0.59 mol + 0.20 mol) * 0.0821 L atm/mol K × 296.15K / 5.50 L. This yields a final pressure of approximately 2.54 atm.

https://brainly.com/question/32062897

#SPJ3