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Atomic Mass

In a sample o...

Question

In a sample of $35.0 g$ hydrogen sulfide, how many moles are contained?

A

1.03 m o l

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B

2.06 m o l

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C

6.18 m o l

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D

9.45 m o l

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E

11.3 m o l

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Solution

The correct option is A $1.03 m o l$
Molar mas of $H_{2} = 2 (1) + 32 = 34 g / m o l$
Number of moles is obtained by dividing mass with molar mass.
Number of moles, $n = \frac{35.0}{34} = 1.03 m o l$

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