What is the formula for calcium fluoride​

Answer:

3 Hz

The frequency is three waves per second, or 3 Hz.                                                                

Answer:

6.26 mol.

Explanation:

no. of moles (n) = mass/molar mass.

mass of NaHCO₃ = 526.0 g, Molar mass of NaHCO₃ = 84.007 g/mol

∴ no. of moles (n) of NaHCO₃ = mass/molar mass = (526.0 g)/(84.007 g/mol) = 6.26 mol.

Answer:

12.0107

Explanation:

Hope this helps!

Answer:

Infrared radiation lies between the visible and microwave portions of the electromagnetic spectrum. Infrared waves have wavelengths longer than visible and shorter than microwaves, and have frequencies which are lower than visible and higher than microwaves.

Explanation:

Answer:

Determine the value of the oxidation numbers of atoms or ions on the reactant side and the product side.

Explanation:

A redox reaction involves some ions, and atoms losing electrons and other gaining them in the same reaction. When oxidation occurs, there is loss of electrons by an element thus its oxidation number increases; becomes more positive. When reduction occurs an element gains electrons and the oxidation  number becomes more negative; reduces.

If an element (s) behaves in this manner in the whole reaction, then be sure to deduce that a redox reaction has occurred.

Answer:

If oxidation state changes, it is a redox reaction

Explanation:

For apex The answer is b

In the equation Zn + 2HCl → ZnCl₂ + H₂, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas. 7 grams of hydrogen gas will form. Therefore, option B is correct.

With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is removed, zinc transforms into a shiny-greyish metal that is slightly brittle at normal temperature. It is the first element in the periodic table's group 12

Oysters are the best source of zinc, but it is also abundant in red meat and fowl. Beans, almonds, crab, lobster, whole grains, breakfast cereals, and dairy products are additional excellent sources.

A non-metal hydrogen is displaced by a metal zinc in a single displacement reaction. As a reductant metal, zinc (Zn) dispenses hydrogen (H₂) from an aqueous solution of HCl to produce zinc chloride (ZnCl2) and hydrogen gas (H₂).

Thus, 7 grams of hydrogen gas will form, option B is correct.

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Answer:

The answer is...

Explanation:

Constructive Interference

Answer:

[tex]\boxed{\text{phase}}[/tex]

Explanation:

When two waves are in phase, their peaks and troughs line up.

They undergo constructive interference, and the amplitude of the resulting wave is larger than either of the individual waves.

In the diagram below, the two red waves are in phase, and they combine to give a new wave (green) with a greater amplitude.

Answer:

N is reduced; P is oxidized;

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Explanation:

Probably the easiest way to balance the equation is to use the ion-electron method.

Step 1. Write the skeleton equation

HNO₃ + P ⟶ H₃PO₄ + NO

Step 2. Separate into two half-reactions.

HNO₃ ⟶ NO

P ⟶ H₃PO₄  

Step 3.  Balance all atoms other than H and O

Done

Step 4. Balance O by adding H₂O molecules to the deficient side.

HNO₃ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄  

Step 5. Balance H by adding H⁺ ions to the deficient side.

3H⁺ + HNO₃ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄ + 5H⁺

Step 6. Balance charge by adding electrons to the deficient side.

3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O

4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻

The N atom is reduced because it gains electrons. The P atom is oxidized because it loses electrons.

Step 7. Multiply each half-reaction by a number to equalize the electrons transferred.

5 × [3H⁺ + HNO₃ + 3e⁻ ⟶ NO + 2H₂O]

3 × [4H₂O + P ⟶ H₃PO₄ + 5H⁺ + 5e⁻]

Step 8. Add the two half-reactions.

15H⁺ + 5HNO₃ + 15e⁻ ⟶ 5NO + 10H₂O

12H₂O + 3P ⟶ 3H₃PO₄ +15H⁺ + 15e⁻  

15H⁺ + 5HNO₃ + 15e⁻ + 12H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻

Step 9. Cancel species that occur on each side of the equation

15H⁺ + 5HNO₃ + 15e⁻ + 2(12)H₂O + 3P ⟶ 5NO + 10H₂O + 3H₃PO₄ + 15H⁺ + 15e⁻

becomes

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Step 10. Check that all atoms are balanced.

[tex]\begin{array}{ccc}\textbf{Atom} & \textbf{On the left} & \textbf{On the right}\\\text{H} & 9 & 9\\\text{N} & 5 & 5\\\text{O} & 17 & 17\\\text{P} & 3 & 3\\\end{array}[/tex]

Step 11. Check that charge is balanced

[tex]\begin{array}{cc}\textbf{On the left} & \textbf{On the right}\\0 & 0\\\end{array}[/tex]

Everything checks. The balanced equation is

5HNO₃ + 2H₂O + 3P ⟶ 5NO + 3H₃PO₄  

Answer:

light energy to convert carbon dioxide and water into glucose and oxygen gas. Each molecule of glucose essentially “stores” up to 38 molecules of ATP which can be broken down and used during other cellular reactions.

Explanation:

Answer:

Plants use sunlight to make glucose.

Its solar energy. Plants use the sun for energy.

Hope This Helps!  Have A Nice Day!!

Answer:

thermal

Explanation:

I can confirm that the answer you have to type down is thermal.

Answer:

195.199grams

Explanation:

Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.

1 mole of  calcium fluoride has a mass of 40.08+2×18.99984

=78.0797 grams

if one mole has a mass of 78.0797 grams, then 2.5 moles have:

2.5 moles× 78.0797 grams/mole= 195.1992 grams

Answer:

195

Explanation:

First, calculate the molar mass of CaF2:

Ca: 1 × 40.078 g/mol = 40.078 g/mol

F: 2 × 18.998 g/mol = 37.996 g/mol

40.078 g/mol + 37.996 g/mol = 78.074 g/mol CaF2

Then, convert moles to grams by multiplying the number of moles by the molar mass:

2.50 mol CaF2 × 78.074 g/mol CaF2 = 195 g CaF2

Answer:

D

Explanation:

hope this helps

Answer:

A

Explanation:

Noble gases have a full valence shell, so D is correct.

Inert gases are another term for noble gases, so B is correct.

Noble gases are found in the last column, which is group 18. This makes C correct.

The last one is A, so that must be the one that is incorrect.

I hope this helped and please mark me as brainliest!

Answer:

I believe it is;  The universe will stop expanding and collapse in a big crunch.

I may be wrong though so double check on that.

Explanation:

Answer:

The universe will stop expanding and collapse in a big crunch.

Explanation:

Answer: The greenhouse gases cause Earth's surface to heat up from the sunlight.

Explanation: The greenhouse gases causes the Earth's surface to warm up in the morning and at night, the surface cools down. When it cools down, that gives the heat a chance to get back into the air, but some of the heat is trapped (which is caused by the greenhouse gases). That's why, on average, Earth stays at 58 degrees Fahrenheit.

Answer:

The functional group

Explanation:

A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.

Answer: the functional group

Explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

1. Esters have functional group [tex]-O=C-OR[/tex].

Example: methyl ethanoate with molecular formula [tex]CH_3COOCH_3[/tex]

2. Alcohols have functional group [tex]-OH[/tex].

Example: Propanol with molecular formula [tex]CH_3CH_2CH_2OH[/tex]

3. Aledydes have functional group [tex]-O=CH[/tex].

Example: propanal with molecular formula [tex]CH_3CH_2CHO[/tex]

Thus esters , alcohols and aldehydes may have same number of carbon atoms and similar branching pattern but different functional groups.

Number of protons in the nucleus of an atom.

Answer:

The Atomic Number of an atom is the number of protons it contains (which are located in the nucleus of the atom).

Answer:

96.31 g.

Explanation:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,

1.0 mole of CaCO₃ reacts with 2.0 moles of HCl to produce 1.0 mole of CaCl₂, 1.0 mole of CO₂, and 1.0 mole of H₂O.

no. of moles of CaCO₃ = mass/molar mass = (102 g)/(100.08 g/mol) = 1.019 mol.

Using cross multiplication:

1.0 mole of CaCO₃ produce → 1.0 mole of CaCl₂.

∴ 1.019 mole of CaCO₃ produce → 1.019 mole of CaCl₂.

∴ The amount of CaCl₂ produced = no. of moles x molar mass = (1.019 mol)(110.98 g/mol) = 113.1 g.

∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.

Percent yield of the reaction = 85.15%, theoretical yield = 113.1 g.

∴ actual yield = [(percent yield of the reaction)(theoretical yield)]/100 = [(85.15%)(113.1 g)] / 100 = 96.31 g.

Answer:

96.3

Explanation:

took test

an alkene because there is a double bond

Final answer:

2-Octene is an alkene, a type of unsaturated aliphatic hydrocarbon with a double bond between the second and third carbon atoms in its eight-carbon chain. The double bond's position is what allows us to classify it as an alkene, in line with its general formula CnH2n.

Explanation:

A hydrocarbon is defined as a compound composed entirely of hydrogen and carbon atoms. The two general types of hydrocarbons are aliphatic and aromatic hydrocarbons. Aliphatic hydrocarbons are further subdivided into alkanes, alkenes, and alkynes. Alkanes are hydrocarbons with only single bonds, alkenes contain one or more double bonds, and alkynes contain one or more triple bonds.

2-Octene is an example of an alkene, which is a type of unsaturated aliphatic hydrocarbon. The term '2-octene' indicates that the hydrocarbon has eight carbon atoms (oct-) and a double bond (--ene) between the second and third carbon atoms, as implied by the number '2' in its name. The presence of this double bond is what allows us to classify 2-octene as an alkene, and its molecular formula can be approximated as CnH2n, which fits the general formula of alkenes.

Answer:

2/5

Explanation:

Make 40% to 40/100 simplify by dividing by 10 to 4/10 then simplify again by dividing by 2 to make 2/5

Answer:

Neutral (no net charge)  

Explanation:

Protons - Positive

Electrons - Negative

Neutrons - No charge

Why?

Neutrons are the particle in an atom with a (as the name suggests)  neutral charge. They are neither positive nor negative, unlike protons or electrons.

Answer: Option (D) is the correct answer.

Explanation:

When a dog runs faster then due to more force applied by the foot there occurs large footprints of the dog.

Spaces between the feet of dog increases due to running faster as running makes an individual to take long steps.

Whereas when a dog walks normally then  his footprints will be smaller in size.

Therefore, we can conclude that the BEST alternative to Rob's conclusion is that one of the dogs ran faster than the other.

The answer is:

The new volume is equal to 206.5 L.

To solve this problem, we need to assume that the pressure is constant, and use the Charle's Law equation, so, solving we have:

[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]

We are given:

[tex]V_1=350L\\T_1=500K\\T_2=295K[/tex]

Then, using the Charle's Law equation, we have:

[tex]\frac{350L}{500K}=\frac{V_2}{295K}[/tex]

[tex]\frac{350L}{500K}=\frac{V_2}{295K}\\\\V_2=\frac{350L}{500K}*295K=206.5L[/tex]

Hence, we have that the new volume is equal to 206.5 L.

Have a nice day!

Answer:

7.3

⋅

10

−

2

Explanation:

Answer:yo yo

Explanation:

123

Answer:

A. Fault blocks

Explanation:

The block mountains are formed by pieces of the crust that breaks down and pieces are pushed up by the movement of the crust around them.  These type of mountains usually have a steep and a slope side, due to the irregular nature of the fracture.  Example of such mountains are the Sierra Nevada mountains in North-America.

They're not caused by the collision of two tectonic plates, like most of the mountains of our planet.

Answer: A. fault blocks

Explanation: Fault-block Mountains - Fault-block mountains are formed along fault lines (the edge between plates).

The huge chunks of rock on either side of the fault are called fault blocks. As the tectonic plates

move, some of the fault blocks are pushed up, while others are pushed down. This difference in

elevation (height) forms fault block mountains. The Sierra Nevada Mountains in the western United

States are fault-block mountains.

Answer:

7

Explanation:

divide 35 by 5 and you get 7

or do inverse operation 7 x 5 = 35

Answer:

[tex]\boxed{\text{7 m/s}}[/tex]

Explanation:

The formula for average speed is  

[tex]\text{speed} = \dfrac{\text{distance}}{\text{time}}\\\\s = \dfrac{d}{t}[/tex]

Data:

d = 35 m

t =   5 s

Calculation:

[tex]s = \dfrac{\text{35 m}}{\text{5 s}} = \text{7 m/s}[/tex]

The average speed of the ball is [tex]\boxed{\textbf{7 m/s}}[/tex]

Answer:

Peatification and coalification

Explanation:

https://energyeducation.ca/encyclopedia/Coal_formation

Answer: Option (D)

Explanation: In order to form coal, two processes might be undergone and they are as follows-

Thus the correct answer is option (D).

Answer:

2.65 atm.

Explanation:

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

(P₁T₂) = (P₂T₁).

P₁ = 3.0 atm, T₁ = 30°C + 273 = 303 K,

P₂ = ??? atm, ​T₂ = -5°C + 273 = 268 K.

∴ P₂ = (P₁T₂)/(T₁) = (3.0 atm)(268 K)/(303 K) = 2.65 atm.

I have posted the answetr in this picture.

Answer:

Ethene reacting with hydrogen gas would produce ethane .

Explanation:

Hydrogenation of alkene gives alkane.

Hydrogenation of ethene gives the saturated hydrocarbon "ethane".

According to the equation:

C₂H₄ + H₂ → C₂H₆.

Answer:

1. Potential energy

2. Potential and kinetic energy

3. Kinetic energy

4. Potential and kinetic energy

5. Potential energy

Explanation:

As shown in picture <3 !!

The list associated with a pendulum as it cycles from the choices below are:

1. Potential energy.

2. Potential and kinetic energy.

3. Kinetic energy.

4. Potential and kinetic energy.

5. Potential energy.

Potential energy is the energy that is the saved in the still state of any object or stored form of energy before it starts to motion.

The kinetic energy is the energy used to perform any work or the energy used when any object is in motion.

Thus, the correct options are 1. Potential energy., 2. Potential and kinetic energy.3. Kinetic energy., 4. Potential and kinetic energy., 5. Potential energy.

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