1. Find the molar mass of MgCl₂:
* Mg (magnesium) has a molar mass of 24.31 g/mol
* Cl (chlorine) has a molar mass of 35.45 g/mol
* MgCl₂ has 1 Mg and 2 Cl atoms: (24.31 g/mol) + 2*(35.45 g/mol) = 95.21 g/mol
2. Use the formula:
* moles = mass / molar mass
3. Plug in the values:
* moles = 53.8 g / 95.21 g/mol
* moles ≈ 0.565 moles
Therefore, there are approximately 0.565 moles in 53.8 g of magnesium chloride.
