Question #cde77

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Answer 1 · 2016-02-25T17:25:00

(a) and (b) are both equivalent and are the correct answers.

First work out the number of moles of water in this 36 grams :

$n=m/(M_r)$

$=36/(1+1+16)$

$=2mol$ .

But 1 mole has $6.023xx10^23$ particles.

Hence 2 moles will have $1.2046xx10^24$ molecules.

This may also be written as $12.046xx10^23$ .

Thus the correct answer is both (a) and (b) as they are equivalent.