General Chemistry

Check Also in Atoms, Molecules, and Ions:

Practice

1.

Calculate the percentage composition of butane, C4H10. How many percent of carbon and hydrogen, by mass, does butane contain?

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82.8% C

17.2% H

Solution

2.

What is the percent composition of lithium in Li3PO?

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17.9%

Solution

3.

What is the percent composition of water in Cupric sulfate pentahydrate, CuSO4·5H2O ?

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36.1%

Solution

4.

How many grams of phosphorous are there in a 49.7 g sample of P2O5?

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21.7 g of P

Solution

5.

Determine the empirical formula for a compound that contains 18.75 % C, 6.25% H, and 75% O by mass.

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CH4O3

Solution

6.

Fructone is used in different types of perfumes as a synthetic fruit-aroma additive. It contains 55.17 % C, 8.046 % H and the rest being oxygen. Determine the empirical and molecular formula of Fructone considering that its molar mass is 174.0 g/mol.

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Molecular – C8H14O4

Empirical – C4H7O2

Solution

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