Question

How many molecules of nitrogen monoxide are in a 22.5 gram sample?

Answer 1

Okay, so you need to start by finding the molar mass (grams in one mole) of nitrogen monoxide (NO). N=14g. O=16g

Answer 2

The number of molecules of nitrogen monoxide is $4.52\times 10^{23}$

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of nitrogen monoxide = 22.5 g

Molar mass of nitrogen monoxide = 30 g/mol

Putting values in equation, we get:

$\text{Moles of nitrogen monoxide}=\frac{22.5g}{30g/mol}=0.75mol$

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules

So, 0.75 moles of nitrogen monoxide will contain = $\frac{6.022\times 10^{23}}{1}\times 0.75=4.52\times 10^{23}$ number of molecules

Learn more about number of moles and mole concept:

https://brainly.com/question/919137

https://brainly.com/question/10982990

#learnwithbrainly