Calculating Molecular mass

Calculate the relative molecular mass, Mr of nitrous oxide,  $N_2O$  

[Ar: O, 16; N, 14]

Calculate the relative molecular mass, Mr of sodium carbonate,  $Na_2CO_3$   

[Ar: O, 16; C, 12; Na, 23]

Calculate the relative molecular mass, Mr of aluminium oxide,  $Al_2O_3$   

[Ar: O, 16; Al, 27]

Calculate the relative molecular mass, Mr of ammonium nitrate,  $NH_4NO_3$   

[Ar: O, 16; N, 14; H, 1]

Calculate the relative molecular mass, Mr of sodium hydrogencarbonate,  $NaHCO_3$  

[Ar: O, 16; C, 12; Na, 23; H, 1]

Calculate the relative molecular mass, Mr of sodium oxide,  $Na_2O$  

[Ar: O, 16; Na, 23]

Calculate the relative molecular mass, Mr of copper oxide,  $CuO_{ }$   

[Ar: O, 16; Cu, 64]

Calculate the relative molecular mass, Mr of copper carbonate,  $CuCO_3$   

[Ar: O, 16; C, 12; Cu, 64]

Calculate the relative molecular mass, Mr of potassium nitrate,  $KNO_3$  

[Ar: O, 16; K, 39; N, 14]

Calculate the relative molecular mass, Mr of potassium nitrite,  $KNO_2$  

[Ar: O, 16; K, 39; N, 14]