A compound is known to contain 65.44% carbon and 19.36% oxygen by mass. Each molecule contains two atoms of oxygen. What is the molar mass of this substance?How many carbon atoms are there in the molecular formula for this compound? (It should be a whole number, no units)

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Asked Sep 9, 2019

A compound is known to contain 65.44% carbon and 19.36% oxygen by mass. Each molecule contains two atoms of oxygen. What is the molar mass of this substance?

How many carbon atoms are there in the molecular formula for this compound? (It should be a whole number, no units)

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Expert Answer

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In a 100 g of compound, 65.44% carbon and 19.36% oxygen is present by mass. By determin...

65.44g -5.45mol
mass
No.of moles of carbon
molar mass 12g/mol
19.36g -121mol
mass
No.of moles of oxygen
molar mass 16g/mol
Ratioof C:O=5.45:1.21 4.5:1
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65.44g -5.45mol mass No.of moles of carbon molar mass 12g/mol 19.36g -121mol mass No.of moles of oxygen molar mass 16g/mol Ratioof C:O=5.45:1.21 4.5:1

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