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

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.