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​C3: Quiz 1 – Answers

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

Questions

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