3 years ago

What is the law of conservation of mass and how does it relate to chemical equations?

1 answer:

6 0

Answer: Matter cannot be created or destroyed in chemical reactions.

Explanation: This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.

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_c h 3 c h 2 c o o h+ _0 2 -》 _h 2 o + co2 how many molecules of o2 are required for the complete combustion of 6 moles of propa

lesya692 [45]

Answer:

21 molecules of oxygen.

Explanation:

The balanced equation is

2CH3CH2COOH + 7O2 -----> 6CO2 + 6H2O.

So 2 molecules of propanoic acid require 7 moles of oxygen.

Therefore 6 molecules require 7/2 * 6 = 21 molecules of oxygen.

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3 years ago

How many total atoms does each element have? <br> Plz help!

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sineoko [7]

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Water is $H_{2}$ <em>O</em>

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2 years ago

Do states need to be written in a chemical equation

Reptile [31]

Yes. because equation balances the number of particles.

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