Question

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

Answer 1

`3.01 times 10^(24)`

Explanation:

The molar mass of carbon monoxide (`CO`) is 28.01 g/mol.

First calculate the number of moles of CO:
`(140 g)/(28.01 g/(mol))=5.00 mol`

Then multiply by Avogadro's number to obtain the number of molecules:
`5.00 mol times 6.022 times 10^23 mol^-1=3.01 times 10^(24)`