The mass of 0.125 mol of nitrogen is

A 224g

B 1.75g

C 3.50g

D 112g

Answer:C - 3.50g

Explanation:

To solve this problem, nitrogen is a gas and it's always two atoms of it in every reaction.

Using the formula

n = m / Mm

n - number of mole

m - number of mass

Mm - number of molar mass

n = 0.125 mole

The molar mass of N2 = 14.0067 * 2 = 28.0134g/mol

(N - 14.0067)

n = mass / molar mass

0.125 mol = mass / 28.0134g/mol

Mass = 0.125 * 28.0134

= 3.501675

= 3.50g