Question

Calculate the number of moles of Mg present in a Mg ribbon weighing 12 g. The molar atomic mass of Mg is 24.3 g/mol.

Answer 1

Approximately 0.4938 moles of magnesium are present in a 12 gram ribbon of Mg, using the molar mass of 24.3 g/mol for the calculation.

Step-by-step explanation:

To calculate the number of moles of Mg present in a 12 gram Mg ribbon, use the formula:

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

Given that the molar mass of Mg is 24.3 g/mol, we can perform the following calculation:

Number of moles = 12 g / 24.3 g/mol = 0.4938 moles (approx.)

So, there are approximately 0.4938 moles of magnesium in a 12 gram ribbon of Mg.