Respuesta :

To convert a mass of a substance to units of moles, we would need the molar mass of the substance since is it describes the mass of one mole of that substance. For CuCl2, the molar mass is 134.45 g/mol. For Al, the atomic mass is 26.98 g/mol.

2.50 g CuCl2 ( 1 mol / 134.45) = 0.019 mol CuCl2
0.25 g Al ( 1 mol / 26.98 g ) = 0.0093 mol Al
Eduard22sly

A. 2.50 g of CuCl₂ equals 0.02 mole

B. 0.25 g of Al equals 0.009 mole

Description of mole

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

A. How to determine the mole 2.50 g CuCl₂

  • Molar mass of CuCl₂ = 134.45 g/mol
  • Mass of CuCl₂ = 2.50 g
  • Mole of CuCl₂ =?

Mole = mass / molar mass

Mole of CuCl₂ = 2.5 / 134.45

Mole of CuCl₂ = 0.02 mole

B. How to determine the mole 0.25 g Al

  • Molar mass of Al = 27 g/mol
  • Mass of Al = 0.25
  • Mole of Al =?

Mole = mass / molar mass

Mole of Al = 0.25 / 27

Mole of Al = 0.009 mole

Learn more about mole:

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