Question

# Calculate the mass of $$12.0\times 10^{14}$$ atoms of hydrogen.

A
6.023×1023 g
B
12×1014 g
C
1.99×109 g
D
9.33×1022 g

Solution

## The correct option is B $$1.99\times 10^{-9}$$ gMass of $$6.02\times 10^{23}$$ atoms of hydrogen = $$1$$ gTherefore mass of $$1$$ atom of hydrogen = $$\dfrac{1}{6.02\times 10^{23}}$$ g$$\therefore$$ Mass of $$12\times 10^{14}$$ atoms of hydrogen = $$\dfrac{12\times 10^{14}}{6.02\times 10^{23}}$$ = $$1.99\times 10^{-9}$$gChemistry

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