What is the molar mass of calcium?

1 Answer
Mar 19, 2018

40 \ "g/mol".

Explanation:

On the periodic table, it shows us that calcium has a mass of around 40 \ "amu".

We now need to convert from "amu" to "g/mol".

We know that the mass of one mole of carbon-12 atoms is 12 \ "g", or,

1 \ "mol"*m_(""^12C)=12 \ "g", because of the definition of the mole.

And so, we get, m_(""^12C)=12 \ "g/mol".

Meanwhile, one carbon-12 atom has a mass of exactly 12 \ "amu", i.e. m_(""12^C)=12 \ "amu".

So, we have found out that

12 \ "g/mol"=12 \ "amu"

or

1 \ "g/mol"=1 \ "amu"

Source: https://chemistry.stackexchange.com/questions/13764/amu-and-g-mol-relation

Now, a calcium atom has a mass of 40 \ "amu".

So, the molar mass of calcium would be 40 \ "g/mol".