Question

A chemist weighed out 101. g of gallium. Calculate the number of moles of gallium she weighed out.

Answer 1

To find the number of moles of gallium, divide the mass of gallium by its molar mass, yielding approximately 1.448 moles.

Step-by-step explanation:

To calculate the number of moles of gallium a chemist weighed out, we need to use the molar mass of gallium. Gallium's molar mass can be found on the periodic table and is approximately 69.723 g/mol. Using the formula:

number of moles = mass (g) / molar mass (g/mol)

We can plug in the values to get:

number of moles of gallium = 101 g / 69.723 g/mol

This calculation gives us approximately 1.448 moles of gallium.