Answer:C - 3.50g
Step-by-step 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