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zhenek [66]
3 years ago
12

When snow melts does its volume decrease or increase?

Chemistry
1 answer:
kompoz [17]3 years ago
7 0

The volume of the snow decreases. This had happened because the snow is made up or comprised of water (H2O) and oxygen (O). When the snow starts melting, the air inside the snow discharges into the atmosphere and the water turn out to be a puddle on the ground. 

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3 years ago
Use the Lewis model to determine the formula for the compound that forms from each pair of atoms.
Oksi-84 [34.3K]

Answer:

KI

Explanation:

K is 1+  & I is 1- so we need 1 of each to balance out the compound.

8 0
3 years ago
Use the reaction and bond information to answer the question. H2 CO2 → CH2O2 Reactant bond energies: H–H is 432 kJ/mol, C=O is 7
Anna11 [10]

The energy absorbed by the system before the reaction start has been 752 kJ/mol.

The bond energy has been defined as the energy possessed by the bond that has been converted into the heat energy and utilized in the reaction.

The energy has been conserved in a chemical reaction. Thus, the energy absorbed by the reactant in the reaction has been the difference in the energy of the reactant and product.

<h3>Computation for the energy absorbed</h3><h3 />

The given reaction has been:

\rm H_2\;+\;CO_2\;\rightarrow\;CH_2O_2

The bond energy of the reactant has been:

H-H bond energy = 432 kJ/mol

2 C=O bond energy= 799 kJ/mol

The total energy of the reactant has been 432 kJ/mol + 799 kJ/mol

The total energy of the reactant has been 1231 kJ/mol

The bond energy of the product has been:

C-O bonds = 358 kJ/mol

C=O bonds = 745 kJ/mol

1 C-H bond = 413 kJ/mol

1 O-H bond = 467 kJ/mol

The total energy of the product has been 358 + 745 + 413 + 467 kJ/mol

The total energy of the product has been 1,983 kJ/mol

According to the law of conservation of energy:

\text{Product energy=Reactant energy + energy absorbed}

Substituting the values for energy absorbed:

\text{1,983 kJ/mol=1231\;kJ/mol+ energy absorbed}\\\rm Energy\;absorbed=1983-1231\;kJ/mol\\Energy\;absorbed=752\;kJ/mol

The energy absorbed by the system before the reaction start has been 752 kJ/mol.

Learn more about bond energy, here:

brainly.com/question/866298

7 0
2 years ago
Balance the reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1.
Ann [662]
2HCL + __ Zn --> ZnCl2 + H2

i think that's right, not exactly sure.
7 0
3 years ago
Read 2 more answers
Calculate the [OH–] if the hydrogen ion concentration is 3.64 x 10–8 M.
KIM [24]
Hello.


He have that:

[H+][OH-] = 10⁻¹⁴

3.64 x 10⁻⁸ [OH-] = 10⁻¹⁴

[OH-] = 0.27 x 10⁻⁶ mol/L
3 0
3 years ago
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