Asample of a substance that has a density of 0.824 g/ml has a mass of 0.421 g. calculate the volume of the sample.

Density is a physical property which describes the mass of a substance per unit of volume of the substance. It is expressed as Density = m / V and it has units like g/cm^3. We use the density given to solve the problem.Density = m / V0.824 g/mL = 0.451 g / VV = 0.451 g / 0.824 g/mLV = 0.55 mL

U whay do you need with?

(no3)⁻n has oxidation number x,o has oxidation number -2.(x*1 -2*3) charge of the nitrate ion, and we know that charge of the nitrate ion =-1.so,(x*1 -2*3) =-1x-6=-1x=+5answer a. +5.