Question

What is the mass of .5 mole of calcium atoms?

Answer 1

Approx. `20*g`

Explanation:

`1` `"mole"` of calcium atoms have a mass of `40.08*g*mol`. It follows that `0.5*molxx40.08*g*mol^-1` `=` `??g`.

What is the number of calcium atoms that has this mass?