Question

calculate the molecular mass or formula mass (in amu) of each of the following substances. round your answer to the hundredths place. part 1 of 2 n₂o = 44.02 amu part 2 of 2 no₂ = 46.01 amu

Explanation:

Step1: Recall atomic masses

The atomic mass of N (nitrogen) is approximately 14.01 amu and of O (oxygen) is approximately 16.00 amu.

Step2: Calculate molecular mass of N₂O

For N₂O, there are 2 N - atoms and 1 O - atom. Molecular mass = 2×14.01+16.00 = 28.02 + 16.00=44.02 amu.

Step3: Calculate molecular mass of NO₂

For NO₂, there is 1 N - atom and 2 O - atoms. Molecular mass = 14.01+2×16.00 = 14.01+32.00 = 46.01 amu.

Answer:

N₂O: 44.02 amu
NO₂: 46.01 amu