How many moles of nitrogen are in 2.0*10-2mole of quinine?

Express your answer using two significant figures.

Answer: 4 x 10 ∧-2 moles of nitrogen.

Explanation:

The chemical formular for quinine is; C20 H24 N2 O2

As can be seen from the chemical formular;

1 mole of quinine contains 2 moles of Nitrogen

Thus; 2.0 x 10 ∧-2 moles of quinine would contain

2.0 x 10 ∧-2 x 2 = 4 x 10 ∧-2 moles of nitrogen.

Therefore 4 x 10 ∧-2 moles of nitrogen are in 2.0*10-2mole of quinine