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Topic 5: Chemical formulas and Chemical Equations

7. Formulas of binary ionic compounds: Determining correct formula from name

1. Which is the correct formula for potassium hydride? 3) KOH 4) K(OH)2
1) KH2

2) KH

2. Which formula correctly represents the compound aluminum iodide ? 4) Al3I3
3) Al3I
1) AlI

2) AlI3

3. What is the correct chemical formula for cesium oxide?
1) CsO2 2) C2O3 3) CsO 4) Cs2O
4. Which formula is correct for magnesium sulfide?
1) MgS 2) Mg2S2 3) MnS 4) Mn2S2

5. Which is the formula for calcium nitride? 3) Ca3N3 4) Ca3N2
Teacher Preview Copy

1) PtN Teacher Preview Copy
1) CaN
2) Ca2N3

8. Formulas of compounds with polyatomic ion: Determining correct formula from name

1. Which formula is correct for sodium nitrate?

1) NaNO2 2) NaNO3 3) Na(NO)2 4) Na(NO)3

2. Which formula is correct for magnesium phosphate? 3) Mg2(PO4)3 4) Mg3(PO4)2
1) Mg2PO7

2) MgPO4

3. Which is the correct formula for ammonium oxide? 3) (NH4)2O 4) (NH4)2O2

2) NH2O

1) NH4O

4. Which is the correct formula for ammonium sulfate? 3) (NH4)2(SO4)2 4) (NH4)2SO4
1) NH4SO4

2) NH4(SO4)2

5. Which is the correct formula for zinc carbonate? 3) ZnCO6 4) ZnCO

2) Zn2(CO3)2
1) ZnCO3

9. Formulas of compounds with multiple oxidation numbers: Determining correct formula

1. What is the correct formula for lead (II) chloride?
1) PbCl 2) Pb2Cl 3) Pb2Cl2 4) PbCl2

2. The formula for lead (II) oxide is
1) PbO 2) PbO2 3) Pb2O 4) Pb2O3

3. The correct formula for the compound platinum (IV) nitride is ?
2) Pt3N4 3) Pt4N3 4) Pt4N
4. The correct formula for manganese (IV) sulfide is
1) Mn4S 2) MnS2 3) Mn4S2 4) Mn4S4

5. Which formula is correct for copper (II) chlorate?
1) Cu2Cl 2) CuCl2 3) Cu2ClO3 4) Cu(ClO3)2

6. Which formula correctly represents lead(II) thiosulfate?
1) Pb2(S2O3)2 2) Pb2S4O6 3)PbS2O3 4) PbSO3

7. Which formula is correct for nitrogen (IV) oxide?
1) NO2 2) N2O 3) N2O2 4) N4O2

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