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

1 Answer
Nov 30, 2016

Answer:

#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)#