Question
Asked Dec 6, 2019
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3.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 46. g/mol, is burned
completely in excess oxygen, and the mass of the products carefully measured:
product
mass
6.70 g
carbon dioxide
4.11 g
water
Use this information to find the molecular formula of X.
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Explanation
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3.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molecular molar mass of 46. g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured: product mass 6.70 g carbon dioxide 4.11 g water Use this information to find the molecular formula of X. Check Explanation Privac Terms of Use O 2019 McGraw-Hill Education. All Rights Reserved. 10:0 12/5/ 99+ O Type here to search hp home ins prt sc delete f12 fiu fjo f9 f8 f7 +. f6 10

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Expert Answer

Step 1

Given:

Mass of CO2 = 6.70 g.

Mass of H2O = 4.11 g.

Molar mass of CO2 = 44 g/mol.

Molar mass of H2O = 18 g/mol.

Step 2

Calculation for mass of Carbon in CO2:

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molar mass of C Mass of C = Mass of CO, x molar mass of CO2 12 g/mol Mass of C = 6.70 g × 44 g/mol Mass of C = 1.83 g

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Step 3

Calculation for mass of Hydro...

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2 x molar mass of H molar mass of H20 Mass of H = Mass of H20 x 2.02 g/mol Mass of H = 4.11 g × 18 g/mol Mass of H = 0.46 g

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