Question

What is the mass of 1.6x10^20 molecules of carbon monoxide?

Answer 1

We need to find the mass of 1.6x10^20 molecules of carbon monoxide

First, we must find the number of mol in the 1.6x10^20 molecules

For this, we need to use the avogadro's number ( 6.02*10^23 )

`1.6\cdot10^(20)\cdot\frac{1\text{mol}}{6.02\cdot10^(23)}=2.66\cdot10^(-4)\text{mol}`

Then, we must calculate the molar mass of carbon monoxide

M(CO) = 12 g/mol + 16 g/mol = 28 g/mol

Finally, we must multiply the number of mol by the molar mass to find the mass

`2.66\cdot10^(-4)mol\cdot28(g)/(mol)=7.448\cdot10^(-3)g=0.007448g`

ANSWER:

0.007