Question

24 g of carbon reacts with some oxygen
to make 88 grams of carbon dioxide.
Find out how much oxygen must have
been used.​

Answer 1

hey mate

Your answer

O2 + C = CO2

O2 + 24g = 88g

O2 = 88 - 24

O2 = 64g

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Answer 2

Explanation:

we know that C + O2 ----> CO2

now since 1 mole of carbon is 12g and 1 mole of oxygen gas is 32g

by law of conservation of mass

mass of C + mass of O2 = mass of CO2

12g + 32g = 44g

since we know 88g of CO2 is produced and 24 grams of carbon is used

24g + xg of O2 used = 88g

from here we get x as 64g

which is the same as 2 moles of O2 gas

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