What is the percent composition of nio?

The percent composition of nickel oxide (NiO) can be calculated by dividing the mass of each element by the total mass of the compound, and then multiplying by 100 to get the percentage.

The molar mass of NiO is 74.71 g/mol.

Ni:

• Atomic mass of Ni = 58.69 g/mol
• (58.69 g/mol ÷ 74.71 g/mol) x 100 = 78.5%
• Therefore, about 78.5% of the mass of nickel oxide is nickel.

O:

• Atomic mass of O = 15.99 g/mol
• (15.99 g/mol ÷ 74.71 g/mol) x 100 = 21.5%
• Therefore, about 21.5% of the mass of nickel oxide is oxygen.

Therefore, the percent composition of NiO can be expressed as approximately 78.5% Ni and 21.5% O.