How many molecules are in 2.570 moles of H2?

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How many molecules are in 2.570 moles of H2?

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Answer 1 · 2018-03-21T13:30:39

$15.5 \cdot 10^{23}$ $15.5*10^23$ molecules (of $H^{2}$ $H^2$ )

Explanation:

Number of moles * Avogadro's number ( $6.02 \cdot 10^{23}$ $6.02*10^23$ )= # of molecules

So:

$2.570 \cdot 6.02 = 15.5$ $2.570*6.02= 15.5$

$15.5 \cdot 10^{23}$ $15.5* 10^23$ = A very, very large number
So you can leave it expressed as $15.5 \cdot 10^{23}$ $15.5* 10^23$

(Note: Avagrdo's number is how many molecules/atoms are in a mole. There are always 12 things in a dozen. There are always $6.02 \cdot 10^{23}$ $6.02*10^23$ things in a mole.)

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How many molecules are in 2.570 moles of H2?

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