Question

what is the molar mass of Mg(ClO2)2?
a: 77.76 g/mole
b: 91.76 g/mole
c: 127.21 g/mole
d: 159.21 g/mole

Answer 1

Do you have a periodic table?

Answer 2

no i left everything at home.

Answer 3

The atomic mass for MG is 24.305 (Look at a the periodic table and fin the atomic mass)
So first you have 1 Mg and 2 of both Cl and O.
What you want to do is to find the atomic mass for both of these.
Atomic mass for: Cl=35.453
Atomic mass for: O=15.9994

What you want to do now is, since you have 2 Cl and 2 O you have to multiply them both;
35.453 x 2 = 70.906
15.9994 x 2 = 31.9988

Now that you have all of them, simply add them all up and see what you get :-)


Ex: H2So4= 2x1.008 + 4x116.00 = 98.09 g/mol

Answer 4

I hope that this helps :-)

Answer 5

Thanks it did (: