1) What is the formula of sodium oxide? a) NaO b) Na2O c) NaO2 d) Na2O2 2) What is the formula of ammonium fluoride? a) NH4F b) NHF c) NHF4 d) N4HF 3) What is the formula of magnesium hydroxide? a) MgOH2 b) Mg2OH c) Mg(OH)2 d) Mg(OH2) 4) What is the formula of aluminium nitrate? a) AlNO3 b) Al(NO)3 c) AlNO9 d) Al(NO3)3 5) What is the formula of copper bromide? a) CuBr b) Cu2Br c) CuBr2 d) Cu2Br2 6) What is the formula of iron(III) oxide a) Fe2O3 b) FeO c) Fe3O2 d) FeO3 7) What is the formula of ammonium carbonate? a) NH2CO3 b) (NH4)2CO3 c) (NH4)2CO d) NH4CO3 8) The formula of lithium hydrogencarbonate LiHCO3. If the lithium ion is Li+, what is the formula of the hydrogencarbonate ion? a) HCO3- b) HCO3- c) HCO- d) HCO3+ 9) The formula of calcium hydrogensulfate Ca(HSO4)2-. If the calcium ion is Ca2+, what is the formula of the hydrogensulfate ion? a) HSO- b) HSO4- c) HSO4+ d) HSO4- 10) The formula of aluminium phosphate is AlPO4. If the aluminium ion is Al3+, what is the formula of the phosphate ion? a) PO4- b) PO43+ c) PO43- d) PO3-

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