1) 40
2) 44
3) 30
4) 160
5) 98
6) 180
7) 296
8) 101
9) 400
10) 187.5
11) 310
12) 107
There are quite a few questions here, so do not feel like you have to answer all of them.
1) Find the relative formula mass of MgO
The Ar of magnesium (Mg) is 24 and the Ar of oxygen (O) is 16.
2) Find the relative formula mass of CO2
The Ar of carbon (C) is 12 and the Ar of oxygen (O) is 16.
3) Find the relative formula mass of C2H6
The Ar of carbon (C) is 12 and the Ar of hydrogen is (H) is 1.
4) Find the relative formula mass of Fe2O3
The Ar of iron (Fe) is 56 and the Ar of oxygen (O) is 16.
5) Find the relative formula mass of H2SO4
H = 1, S = 32, O = 16
6) Find the relative formula mass of C6H12O6
O = 16, H = 1, C = 12
7) Find the relative formula mass of FeBr3
Fe = 56, Br = 80
8) Find the relative formula mass of H2SiCl2
Cl = 35.5, Si = 28, H = 1
9) Find the relative formula mass of Fe2(SO4)3
Fe = 56, S = 32, O = 16
10) Find the relative formula mass of Cu(NO3)2
Cu = 63.5, N = 14, O = 16
11) Find the relative formula mass of Ca3(PO4)2
O = 16, P = 31, Ca = 40
12) Find the relative formula mass of Fe(OH)3
O = 16, Fe = 56, H = 1