How many hydrogen atoms in a $15*mol$ quantity of water?

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Answer 1 · 2017-02-02T16:03:11

$30xxN_A$ , where $N_A="Avogadro's Number........."$

We could have equally asked how many hydrogen atoms are there in the $"ONE molecule of water?"$ Of course there are 2.

The mole is simply another number, admittedly a very large number, i.e. $N_A=6.022xx10^23*mol^-1$ .

And thus in a $15*mol$ quantity there are approx. $9xx10^24$ $"hydrogen atoms"$ . What is the mass of this number of $"hydrogen atoms"$ ?

How many hydrogen atoms in a 15*mol15*mol quantity of water?