Question

What is the total number of moles present in a 52.0 gram sample of nan3?

Answer 1

52.0 divided by 65 g/mol gives you 0.8mol

Answer 2

Answer:

0.800 moles

Explanation:

• n = $\frac{m}{M}$
• n = moles , m = mass in grams (g) , M = molar mass (g/mol)
• Molar mass is the sum of atomic masses in the compound

           Na = 22.99 g/mol

           N = 14.01 g/mol x 3 = 42.03 g/mol

• n = $\frac{52}{22.99+42.03}$

• n = 0.799 = 0.8 moles