Question

1. how many moles are in 9.20 g of nitrogen?

Explanation:

Step1: Identify molar mass of nitrogen

The molar mass of nitrogen (N) is approximately 14.01 g/mol.

Step2: Use mole - mass formula

The formula to calculate the number of moles ($n$) is $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar mass. Given $m = 9.20$ g and $M=14.01$ g/mol, we have $n=\frac{9.20}{14.01}$.

Step3: Calculate the number of moles

$n=\frac{9.20}{14.01}\approx0.657$ mol

Answer:

0.657 mol