Question

What would the total mass of a 4.9 mole sample of Barium (Ba) be if its Molar Mass is 137g?

O 132g
O 142g
O 671g

Answer 1

m = 671 grams

Step-by-step explanation:

Given that,

No of moles, n = 4.9

Molar mass of Barium, M = 137 g

Mass divided by molar mass is equal to no of moles. It can be given by the formula as follows :

`n=(m)/(M)\\\\m=n* M\\\\m=4.9* 137\\\\m=671.3\ g`

or

m = 671 grams

So, the total mass of the sample of Barium is 671 grams.