How many molecules are in 10.0 moles of H2O?

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How many molecules are in 10.0 moles of H2O?

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Answer 1 · 2016-09-04T08:46:48

Well, in one mole of stuff there are $Avogadro's Number, N_{A}$ $"Avogadro's Number, "N_A$ , individual items of stuff.

Explanation:

$Avogadro's Number,$ $"Avogadro's Number,"$ $N_{A}$ $N_A$ , $= 6.022 \times 10^{23} \cdot m o l^{- 1}$ $=6.022xx10^23*mol^-1$ .

$10.0*molxxN_A=10.0*cancel(mol)xx6.022xx10^23*cancel(mol^-1)$

$=$ $6.022xx10^24" individual water molecules."$

Note that had you been asked $"how many eggs are in 2 dozen eggs"$ I think you would have very very quickly given the answer. $N_A$ is a collective number like the $"dozen"$ ; the only difference is that $N_A$ is monumentally larger.

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How many molecules are in 10.0 moles of H2O?

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