I cant see it maybe post it again?
Answer:
N-Cl
Explanation:
Look at the chart below. Since N-Cl bond has a electronegativity difference of (3.0-3.0) zero, they are non-polar.
5mg in liter is 5 ppm
Explanation: 1 ppm is one part per million.
1 ppm is 1 mg is one part of million from 1 kg = 1000 000 mg
1 litre water is 1. Kg.
The formula for rubidium nitride is RbNO3.
The density of the stone is 5 because the formula is mass/volume and the volume is 5 and the mass is 25