Which expression represents the percent by mass of nitrogen in nh 4 no 3 ? a. 28 g n / 80 g nh 4 no 3 × 100% b. 14 g n / 80 g nh 4 no 3 × 100% c. 80 g nh 4 no 3 / 28 g n × 100% d. 80 g nh 4 no 3 / 14 g n × 100%

a)

Explanation: Mass percentage is defined as the ratio of the mass of the particular element to the total mass of the substance multiplied by 100.

mass of nitrogen[2 atoms of N] = 28 g

Total mass of

where is the following

explanation:

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.