Question

Nitrogen (N) is made up of 99.632% 14N and 0.368% 15N. The atomic mass of 14N is 14.003 amu . The atomic mass of 15N is 15.000 amu . What is the average atomic mass of nitrogen?

Answer 1

Answer:

The answer to your question is = 14.0067  amu

Explanation:

Formula

Atomic mass N = (quantity of N 14)(atomic mass N 14) + (quantity of N 15)

                                                                                          (atomic mass N15)

Quantity of N 14 = 0.99632

Atomic mass N 14 = 14.003

Quantity of N 15 = 0.00368

Atomic mass N 15 = 15.000

Substitution

Atomic mass N = (0.99632)(14.003) + (0.00368)(15)

                         = 13.9515 + 0.0552

                         = 14.0067