Question

State the number of moles in 72g of magnesium.

A) 0.5 moles
B) 1 mole
C) 1.5 moles
D) 2 moles

Answer 1

The number of moles of magnesium in 72g is approximately 2.96 moles, which does not match any of the provided options. There may be a mistake in the provided options.

Step-by-step explanation:

To determine the number of moles in 72g of magnesium, we need to use the molar mass of magnesium. The molar mass of magnesium (Mg) is approximately 24.31g/mol. The number of moles is calculated by dividing the mass of the sample by its molar mass:

Number of moles = Mass of Mg (g) / Molar mass of Mg (g/mol)

Using the given mass:

Number of moles = 72g / 24.31g/mol = 2.96 moles

However, none of the options A) 0.5 moles, B) 1 mole, C) 1.5 moles, or D) 2 moles match the calculated value. There might be an error in the provided options or the question may need to be reevaluated to ensure accuracy.