Question

How many moles are equal to 2.8 x 10^23 molecules of carbon monoxide

Answer 1

The proportion of number to mol is 1 mol to approximately 6.022 x 10^23, that is, there are 6.022 x 10^23 of somthing in 1 mol of it.

So, using rule of three, we have:

2.8 x 10^23 molecules --- x

6.022 x 10^23 molecules --- 1 mol

`\begin{gathered} (2.8*10^(23))/(6.022*10^(23))=(x)/(1mol) \\ x=(2.8*10^(23))/(6.022*10^(23))mol=(2.8)/(6.022)*10^(23-23)mol\approx0.46mol \end{gathered}`

So, this is approximately 0.46 mol or 4.6 x 10^-1 mol.