This is an example of law of conservation of mass, which states that the total quantity of mass doesn't change means, in an isolated system mass is neither created nor destroyed by any chemical reactions or physical transformations.
According to law of mass conservation in a chemical reaction:
Mas of the Products = Mass of the Reactants
Chlorine released from chlorofluorocarbons (cfcs) reacts with ozone in the atmosphere to form oxygen. the proposed reactions are cl(g)+o3(g)→clo(g)+o2(g) clo(g)+o(g)→cl(g)+o2(g) identify the species that acts as a catalyst and the one that acts as an intermediate in these reactions.
In the two-step reaction involving chlorine, ozone, and oxygen, chlorine acts as the catalyst because it helps speed up the reaction and is not used up in the process. Chlorine monoxide acts as the intermediate since it is formed in one step and then consumed in a following step.
Explanation:In the given reactions, the species that functions as a catalyst is the chlorine atom (Cl). The reason it is a catalyst is because it is not consumed in the overall reaction; it speeds up the process by reacting with ozone to form ClO which then reacts with another oxygen atom to reform Cl and thus is available for further reaction.
On the other hand, the species that acts as an intermediate is Chlorine monoxide (ClO). An intermediate is a species which is produced in one step of a reaction and consumed in a later step, and thus does not appear in the overall equation. In this case, ClO is formed in the first reaction and then reacts in the second step to produce Cl and O2 thereby not appearing in the overall reaction.
These reactions are particularly significant in the study of the depletion of the ozone layer in the stratosphere. This often occurs due to the breakdown of chlorofluorocarbons (CFCs) which release chlorine atoms that can catalyze the destruction of ozone.
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Which statement describes a limitation of the kinetic-molecular theory for a gas?
The theory assumes that particles do not experience intermolecular forces.
The theory states that pressure is inversely proportional to volume.
The theory assumes that particles are in random and continuous motion.
The theory states that pressure increases with temperature.
Answer:
particles don't experience intermolecular forces
Explanation:
What is the primary difference between a hypothesis and a theory?
A theory is supported by more data and observations than a hypothesis is.
A hypothesis is falsifiable, but a theory has been proven to be correct.
A theory is a prediction, but a hypothesis is an explanation.
A hypothesis is more reliable than a theory.
What are the standard conditions under which reduction potentials are measured? 1°C and 1 M reactants 25°C and 1 M reactants 25°C and 2.5 M reactants 1°C and 25 M reactants
Answer:
25°C and 1 M reactants
Explanation:
The standard conditions to measure the reduction potential as standard electrode potential is 298.15 K temperature (25°C) and 1 mol / L concentration of each reactant.
The pressure should be 1 atm for gaseous reactants (like in case of Standard hydrogen electrode where pressure of hydrogen gas is taken to be 1 atm).
How many grams of salt are in 1 kilogram of seawater with average salinity? quizzlet?
How do the number of electrons in an atom's highest energy level affect its reactivity?
If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice
Combustion analysis of toluene, a common organic solvent, gives 8.20 mg of co2 and 1.92 mg of h2o. if the compound contains only carbon and hydrogen, what is its empirical formula?
An atom has 2 protons in its nucleus. Which of the following must be true for this atom to have no net electrical charge?
Question 2 options:
A.The atom has 2 negatively charged electrons outside the nucleus.
B.The atom also has 2 positively charged neutrons in the nucleus.
C.The atom has 2 negatively charged electrons in the nucleus.
D.The 2 positive protons have no influence on the overall charge of the atom.
Answer:the atom has 2 negatively charged electrons outside the nucleus
Explanation:
What would you need to do to calculate the molality of 10 mol of nacl in 200 mol of water?
The conversion of 200 mol of water to kilograms of water is needed to calculate the molality of 10 mol of NaCl in 200 mol of water. Thus, the correct option is A.
What is Molality?Molality is the measure of concentration of a solution. It is the number of moles of solute which are present in a solution that is corresponding to about 1 kg or 1000 g of solvent solution. This amount contrasts with the definition of molarity which is based on the volume of solution. A commonly used unit for molality in chemistry is mol/kg of the solvent molecule.
The formula for calculation of Molality is:
m = mol/ kg
where, m = molality of solution,
mol = number of moles of solute,
kg = kilogram of solvent
The conversion of 200 mol of water to kilograms of water is necessary for the calculation of molality of the solution.
Here, Solute (mol) = 10 mol NaCl
Solvent (Kg) = 200 mol water (Convert to kilograms of water).
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
What would you need to do to calculate the molality of 10 mol of NaCl in 200
mol of water?
A. Convert the 200 mol of water to kilograms of water.
B. Convert the 200 mol of water to liters of water.
C. Convert the 10 mol of NaCl to grams of NaCl.
D. Convert the 10 mol of NaCl to kilograms of NaCl.
Mendeleev periodic table was a useful tool because it enables scientists to
Answer:
Mendeleev's periodic table was a useful tool because it enables scientists to predict properties of unknown elements.
Explanation:
Write the ions present in solution of k2co3. express your answers as chemical formulas separated by a comma. identify all of the phases in your answers.
Answer : The ions present in the solution of [tex]K_2CO_3[/tex] are [tex]K^+[/tex] and [tex]CO^{2-}_3[/tex] in aqueous state.
Explanation :
When [tex]K_2CO_3[/tex] is in aqueous solution then they dissociates into their ions.
The reaction in aqueous medium is,
[tex]K_2CO_3(aq)\rightarrow 2K^+(aq)+CO^{2-}_3(aq)[/tex]
The charge on potassium ion is +1 and on carbonate ion is -2. To neutralize the charge on carbonate ion, two potassium ion must be used.
Therefore, the ions present in solution of [tex]K_2CO_3[/tex] are [tex]K^+[/tex] and [tex]CO^{2-}_3[tex] in aqueous state.
[tex]\boxed{{{\text{K}}^ + },\;{\text{CO}}_3^{2 - }}[/tex] are the ions present in the solution of [tex]{{\text{K}}_{\text{2}}}{\text{C}}{{\text{O}}_{\text{3}}}[/tex] . Both ions are in the aqueous phase.
Further Explanation:
Chemical bond:
The attraction between atoms, molecules or ions which results in the formation of chemical compounds is known as a chemical bond. It is formed either due to electrostatic forces or by the sharing of electrons. There are many strong bonds such as ionic bonds, covalent bonds, and metallic bonds while some weak bonds like dipole-dipole interactions, London dispersion forces, and hydrogen bonding.
Ionic compound:
Ionic compounds are the compounds that are formed from the ions of the respective species. Ions are the species that are formed either due to loss or gain of electrons. A neutral atom forms cation by the loss of electrons and anion by the gain of electrons.
Following are some of the properties of ionic compounds:
1. These are hard solids.
2. High melting and boiling points.
3. Good conductors of heat and electricity.
4. High enthalpy of fusion.
For example, [tex]{\text{MgC}}{{\text{l}}_2}[/tex] is an ionic compound formed from one [tex]{\text{M}}{{\text{g}}^{2 + }}[/tex] and two [tex]{\text{C}}{{\text{l}}^ - }[/tex] ions. Its dissociation occurs as follows:
[tex]{\text{MgC}}{{\text{l}}_2}\rightleftharpoons {\text{M}}{{\text{g}}^{2+}}+{\text{2C}}{{\text{l}}^ - }[/tex]
[tex]{{\mathbf{K}}_{\mathbf{2}}}{\mathbf{C}}{{\mathbf{O}}_{\mathbf{3}}}[/tex] is an ionic compound that consists of two [tex]{{\mathbf{K}}^{\mathbf{ + }}}[/tex] ions and one [tex]{\mathbf{CO}}_{\mathbf{3}}^{{\mathbf{2 - }}}[/tex] ion. Therefore it dissociates to form two [tex]{{\text{K}}^ + }[/tex] ions and one [tex]{\text{CO}}_3^{2 - }[/tex] ion. The reaction for dissociation of [tex]{{\mathbf{K}}_{\mathbf{2}}}{\mathbf{C}}{{\mathbf{O}}_{\mathbf{3}}}[/tex] is,
[tex]{{\text{K}}_2}{\text{C}}{{\text{O}}_3}\left({aq}\right)\to2{{\text{K}}^ + }\left( {aq} \right)+{\text{CO}}_3^{2 - }\left({aq}\right)[/tex]
So the ions present in [tex]{{\text{K}}_2}{\text{C}}{{\text{O}}_3}[/tex] solution are two [tex]{{\text{K}}^ + }[/tex] and one [tex]{\text{CO}}_3^{2 - }[/tex] ions. Both the ions are present in the aqueous phase.
Learn more:
1. Identification of ionic bonding: https://brainly.com/question/1603987
2. Oxidation and reduction reaction: https://brainly.com/question/2973661
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Ionic and covalent compounds
Keywords: K2CO3, K+, CO32-, ionic compound, ions, one, two, dissociation, reaction, ions, cation, anion, electrons, chemical bond, attraction, properties, aqueous phase.
Which types of substances dissolve better in water: hydrophobic or hydrophilic substances? why do you think so?
A segment of DNA shows bases in this order AGT CAC GCA, complete the corresponding DNA strand: TCA GTG?
A) ACG
B) CGT
C) GCA
D) TGC
Recall the formula of glucose is c 6 h 12 o 6 . how many carbon, oxygen, and hydrogen atoms will you need for three glucose molecules
Three glucose molecules would require 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
Explanation:The formula for glucose is C6H12O6, which means each molecule of glucose is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Thus, for three glucose molecules, you would need 3 times the amount of each type of atom. So, you would need 18 carbon atoms, 36 hydrogen atoms, and 18 oxygen atoms.
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Inductive reasoning requires _____.
A: creative thought
B: a computer
C: algorithms
D: bias
Inductive reasoning requires creative thinking.
Which element on the periodic table has chemical properties that are most similar to carbon?
The element which has most similar chemical properties to carbon is silicon.
What are chemical properties?These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.
These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.
The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.Chemical properties are almost similar for elements in a group.
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10,300 milliliters is the same as: cm3 and L
For this case what you should do is keep in mind the following conversions:
[tex] 1 milliliter = 1 cm ^ 3 [/tex]
[tex] 1000 milliliters = 1 L [/tex]
Therefore, by applying the conversions we have:
For cubic centimeters:
[tex] (10,300mL) (1\frac{cm^3}{mL}) = 10,300cm ^ 3 [/tex]
For liters:
[tex] (10,300mL) (\frac{1}{1000}\frac{L}{mL}) = 10.3 L [/tex]
Answer:
10,300 milliliters is the same as:
[tex]10,300cm ^ 3[/tex]
[tex]10.3 L[/tex]
A single electron has a charge of 4.5×10−15 z . using zeets and a fictitious unit of mass called the wiggle, w, the charge-to-mass ratio of an electron is 5.4×106 z/w . what is the mass of an electron in wiggles?
Using the charge-to-mass ratio and the given charge of an electron, the mass of an electron is calculated to be approximately 8.333×10−21 wiggles.
Explanation:To calculate the mass of an electron in wiggles (w), given that a single electron has a charge of 4.5×10−15 z and the charge-to-mass ratio of an electron is 5.4×106 z/w, we can use the formula:
Charge-to-mass ratio = Charge/Mass
Plugging in the values we have:
5.4×106 z/w = 4.5×10−15 z / Mass in wiggles
To find the mass in wiggles, we rearrange the formula to solve for mass:
Mass in wiggles = Charge / Charge-to-mass ratio
Mass in wiggles = 4.5×10−15 z / 5.4×106 z/w
Mass in wiggles = 8.333×10−21 w
Therefore, the mass of an electron is approximately 8.333×10−21 wiggles.
The mass of an electron, given a charge of 4.5×10⁻¹⁵ z and a charge-to-mass ratio of 5.4×10⁶ z/w, is approximately 0.8333 × 10⁻²¹ wiggles.
Let's solve for the mass of the electron:
The charge of the electron, q, is 4.5×10⁻¹⁵ z.The charge-to-mass ratio (q/m) is 5.4×10⁶ z/w.We need to find the mass (m), so we rearrange the formula: q/m = 5.4×10⁶ z/wSolving for m, we get: m = q / (q/m) = (4.5 × 10⁻¹⁵ z) / (5.4 × 10⁶ z/w)Simplifying, m = (4.5/5.4) × 10⁻²¹ w ≈ 0.8333 × 10⁻²¹ wThus, the mass of the electron is approximately 0.8333 × 10⁻²¹ wiggles.
All of the halogens __________. a. exhibit metallic character b. form salts with alkali metals with the formula mx c. exist under ambient conditions as diatomic gases d. tend to form negative ions of several different charges e. tend to form positive ions of several different charges
In 1912, chemist Fritz Haber developed a process that combined nitrogen from the air with hydrogen at high temperatures and pressures to make ammonia. Specifically, the process involved combining one molecule of nitrogen gas (N2) with three molecules of hydrogen gas (H2) to get two molecules of ammonia (NH3). If you write this process in a symbol format, it looks like this:
N2 + 3H2 → 2NH3
Explain whether this is a chemical or physical change, and why. Does it involve elements, compounds, mixtures, or pure substances? Also describe how many atoms are involved before and after. What do you notice about the number of atoms?
Answer:
Chemical change
Compounds
Number of atoms of hydrogen on both side=6
Number of atoms of nitrogen on both sides=2
Number of atoms of nitrogen and hydrogen on both sides are equal.
Explanation:
We are given that a reaction
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
It is chemical change because there is chemical reaction occurring .In physical change, no chemical reaction takes place.
It involved compound because compound consist of two or more than two atoms of same or different elements . In compound , the atoms are bonded together by chemical bond.
Nitrogen is a compound because two nitrogen atoms are bonded together to form a molecule of nitrogen.Similarly , in hydrogen molecules, two hydrogen atom are bonded together to form one hydrogen molecule.
In ammonia, 3 hydrogen and 1 nitrogen atom are bonded together to form ammonia.
On LHS
Number of atoms of hydrogen=6
Number of nitrogen atoms=2
On RHS
Number of atoms of Hydrogen=6
Number of nitrogen atoms=2
Number of atoms of every element in reactants equals to number of atoms of every element in product.
What type of combustion fuels produces the greenhouse gas carbon dioxide?
How many milliliters of a stock solution of 17.0 m hno3 would you have to use to prepare 0.500 l of 0.200 m hno3? ml?
A gold atom has a radius of 145 pm. If you could string gold atoms like beads on a thread, how many atoms would you need to have a necklace 36 cm long?
To make a necklace 36 cm long, you would need approximately 1241 gold atoms.
Explanation:To determine the number of gold atoms needed to make a necklace of a certain length, we need to calculate the number of gold atoms that can fit along the length of the necklace. The radius of a gold atom is given as 145 pm. To convert the length of the necklace to picometers (pm), we multiply 36 cm by 10,000 to get 360,000 pm.
Dividing the length of the necklace by the diameter of a gold atom, which is twice the radius, we get the number of gold atoms needed.
Number of gold atoms = Necklace length / (2 * Radius) = 360,000 pm / (2 * 145 pm) = 1241 atoms. Therefore, you would need approximately 1241 gold atoms to make a necklace 36 cm long.
O, li, c which electrons experience the greatest effective nuclear charge? express your answer as a chemical formula.
How is the atomic mass of an element calculated
The atomic mass of an element is calculated by taking the weighted average of the mass numbers of all its naturally occurring isotopes, calculated by the sum of the protons and neutrons in an atom.
The atomic mass of an element is primarily the total mass of its protons and neutrons. Electrons have a negligible mass and thus are not typically included in the atomic mass calculation. To calculate the atomic mass of an element, you first need to know its mass number, which is the sum of the number of protons and neutrons.
The number of protons is the element's atomic number, and it defines the type of element. For example, carbon (C) has an atomic number of 6, hence it has 6 protons. Carbon's most common isotope has 6 neutrons, therefore, its mass number is 12.
However, because elements can have multiple isotopes with different numbers of neutrons, the atomic mass listed on the periodic table is a weighted average of the mass numbers of all the naturally occurring isotopes of an element. For instance, chlorine (Cl) has an atomic mass of 35.45 because it mainly exists as isotopes with mass numbers of 35 (17 protons and 18 neutrons) and 37 (17 protons and 20 neutrons).
The addition of heat to a pond causes serious problems for the aquatic plants because the increase in water temperature _______.
What is most plastic made of? (more than one)
inorganic compounds
organic compounds
petroleum or coal materials
carbon containing compounds
synthetic materials
Answer:
Plastics are synthetic organic compounds
Explanation:
Describe how clastic sedimentary rock differs from chemical and organic sedimentary rock
Clastic sedimentary rocks form from the deposition of eroded particles of rock. Chemical or non-clastic sedimentary rocks form through chemical precipitation. Organic deposits are products of biological activity and the remains are deposited and consolidated into rock.
How many oxygen atoms are in 6.90 g of Al2(SO4)3? Express your answer using scientific notation with two decimal places.
Answer:
There are 1.44 x 10^23 atoms of oxigen in 6.90 grs of Al2(SO4)3.
Explanation:
To solve this problem you have to find:
1) The molecular mass of Al2(SO4)3;
2) Estimates the percentage of oxigen and express it in terms of its moles.
3) Calculate the number of atoms using Avogadro´s Number.
1) Molecular mass Al2(SO4)3= 2x26,98 + 3x31.06 + 12x16 =339.14 grs/mol.
2) If in the molecular mass of the compound there are 192 grs/mol (12x16) of oxigen, in 6.90 g will be:
192 grs/mol Oxigen ------------- 339.14 grs/mol Al2(SO4)3
x= 3.90 grs/mol-------------------- 6.90 grs/mol Al2(SO4)3
Then if one mol of oxigen has a mass of 16 grs, 3.90 grs represents....
1 mol oxigen ------------- 16 grs of oxigen
x= 0.24 moles------------ 3.90 grs of oxigen
3) There are 6,022 x 10^23 (Avogrado´s number) atoms of oxigen in a mol of oxigen, so in 0.24 moles will be
1 mol oxigen ---------------- 6,022 x 10^23 atoms of oxigen
0.24 moles oxigen ------- x = 1.44 x 10^23 atoms of oxigen.
Summarizing there are 1.44 x 10^23 atoms of oxigen in 6.90 grs of Al2(SO4)3.