alleryHow many water molecules are present in 9 g of water (molar mass 18 g/mol)?
A6.022 x 10^23
B1.204 x 10^24
C1.806 x 10^23
D3.011 x 10^23
Answer & Solution
Correct answer: D. 3.011 x 10^23
9 g is half a mole, and 0.5 x 6.022 x 10^23 gives 3.011 x 10^23 molecules.
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