Question

If I have 38g of MgCl2, how many moles do I have?

Answer 1

0.3991

Step-by-step explanation:

• no. of moles = mass/molar mass.

so lets get the molar mass of MgCl2

(Mg=24.305 and Cl=35.453) so the molar mass of MgCl2= 24.305+(2*35.453)

molar mass of MgCl2= 95.211

• now lets get the no of moles:

no of moles=38g/95.211=0.3991