Question

a laboratory sample of calcium has a mass of 60.0 g. how many moles of calcium does the sample contain?

Answer 1

1.49 moles of calcium.

Step-by-step explanation:

The molar mass of calcium (Ca) is 40.08 g/mol. To find the number of moles of calcium in a sample of 60.0 g, we can use the following formula:

moles = mass / molar mass

moles = 60.0 / 40.08

moles = 1.49 moles

So, the sample contains 1.49 moles of calcium.