Question

Calculate the mass of 0.5 moles of n2 gas ( molar mass ofb = 14)

Answer 1

Answer:

Mass of N2 is 7g

Explanation:

no of moles = n = 0.5

Molar mass = M = 14 g

mass taken = m =?

By equation;

n = m/M

m= n×M

Therefore

m = 0.5 × 14

= 7 g

Hope you understand

Answer 2

Answer: 14g

Explanation: first here we can find here the mass of n2 gas:-

There will be 2 atoms of nitrogen

Molar mass = 14×2= 28g

Now,

Mole = mass÷molar mass

Mole = 0.5,given mass = ?, Molar mass = 28g

Put the values in formula

0.5 = mass÷28

Mass = 28×0.5 = 14g