# How many moles are present in a #"351 kg"# block of calcium?

##### 2 Answers

The number of moles in

#### Explanation:

First determine the mass of one mole (i.e. molar mass) of calcium. The molar mass of an element is its atomic weight on the periodic table in g/mol.

**The molar mass of calcium is 40.078 g/mol .**

Next, since molar mass is g/mol, we need to convert 351 kg to g. There are 1000 g in 1 kg.

Next we'll convert the given mass to moles by dividing the given mass by the molar mass.

There are approx.

#### Explanation:

And molar quantity is simply the quotient:

Note that this calculation is dimensionally consistent. I wanted an answer in