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Question

What is the mass of 3.01×1022 molecules of NH3?

A
6 g
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B
2 g
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C
0.85 g
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D
10 g
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Solution

The correct option is C 0.85 g
Mass of 6.023×1023 molecules of NH3=17 g
Mass of 3.01×1022 molecules of NH3=17×3.01×10226.023×1023=0.85 g

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