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fredd [130]
3 years ago
6

What is a chemical substance that cannot be broken down into another chemical substance?

Chemistry
1 answer:
Dimas [21]3 years ago
4 0

Molecule is a chemical substance that cannot be broken down into another chemical substance.

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In the decomposition reaction, 1 mole of water (mw = 18.015 g/mol) was produced for every mole of cuo (mw = 79.545 g/mol) produc
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Reactives -> Products

CuO and water are products.

I found this reaction which has CuO and water as products: decomposition of Cu(OH)2.

Cu(OH)2 -> CuO + H2O

Stoichiometry calculus involve the mole proportions you can see in the reaction: When 1 mole of Cu(OH)2 reacts, 1 mole of CuO and 1 mole of H2O are formed.

Considering the molar masses:

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Then: When 83.56 g of Cu(OH)2 react, 79.545 g of CuO and 18.015 g H2O are formed.

You should use that numbers in the rule of three:

79.545 g CuO __________18.015 g water

3.327 g CuO__________ x =3.327*18.015 /79.545 g water 

x= 0.7535 g water




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How many moles of molecules are in 40g of H2O?
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Molecular mass of H2O is: 16+2*1=18
so moles of 40g of H2O is: 40/18=2.22
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