What is the number of molecules of 140 g of CO?

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What is the number of molecules of 140 g of CO?

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Answer 1 · 2016-11-30T03:09:34

$3.01 \times 10^{24}$ $3.01 times 10^(24)$

Explanation:

The molar mass of carbon monoxide ( $C O$ $CO$ ) is 28.01 g/mol.

First calculate the number of moles of CO:
$\frac{140 g}{28.01 \frac{g}{m o l}} = 5.00 m o l$ $(140 g)/(28.01 g/(mol))=5.00 mol$

Then multiply by Avogadro's number to obtain the number of molecules:
$5.00 m o l \times 6.022 \times 10^{23} m o l^{- 1} = 3.01 \times 10^{24}$ $5.00 mol times 6.022 times 10^23 mol^-1=3.01 times 10^(24)$

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What is the number of molecules of 140 g of CO?

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