Chemical Reactions Formulas and Equations Worksheet, Exercises of Chemistry

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Formula & Equations Review gg en ‘as 1. Every water molecule has two hydrogen atoms bonded to one oxygen atom. This fact supports the concept that elements in a compound are A) chemically combined in a fixed proportion B) chemically combined in proportions that vary C) physically mixed in a fixed proportion D) physically mixed in proportions that vary . Which formula represents strontium phosphate? Se** POW? B) Sr3POs CD) Sr3(POsp: | . The compound XCl is classified as ionic if X represents the element Metal + Nonmetal D) Br he 4, What is the chemical formula for iron(II) oxide? a Fer? O° A) SrPO4 C) Sr2(PO4)3 A)H B)I A) FeO B) Fe2Q3 -C) Fe30 D) Fe3O2 _ In which compound is the ratio of metal ions to a nonmetal ions | to 2? | = Cot* Be a calcium bromide B) calcium oxide C) calcium phosphide D) calcium sulfide Cn* PF Cat> So \ 6. Which group on the Periodic Table of the Elements contains elements that react with oxygen to form compounds with the general formula X20? 0” 2 2 8 x" C) Group 14 D) Group 18 x 7. What is the total number of different elements present in — NHNO3? — B) 9 Cod D) 4 8. What is the chemical formula for sodium sulfate? 2 A) 7 5 Not SOq A) Na2SO3 B) Na2S0O4 C) NaSO3 _D) NaSO« DY 9. What is the chemical formula for copper(II) hydroxide? —— 4% = Co OH A) CuOH B) CuOH2 C) Cuw(OH) (D) Cu(OH): ] 10. Which formula correctly represents fhe composition of gD iron (III) oxide? Fet>? O A) FeQ3 B) Fe203 C) Fe3O D) Fe3O2 11. The chemical formula for nickel a) bromide is hoi? Br’ A) NieBr ( B) NiBr2 C) NoBr D) NBnr (b 12. Atoms of metals tend to A) lose electrons and form negative ions B) lose electrons and form positive ions C) gain electrons and form negative ions D) gain electrons and form positive ions 2, the formula of Mi C (7 13. If M represents an element in Group its chloride would be A) MCI C) M2Cl () MCh D) M2Chk 14. Which is the formula for the compound that forms _when magnesium bonds with phosphorus? a -% B) MgP2 D) Mg3P2 A) MgoP C) MgoP3 AY -& 15. What is the [UPAC name for the compound ZnO? A) zinc oxide B) zinc oxalate D) zinc hydroxide % -u 16. What is the chemical formula of iron(II) sulfide? C) zinc peroxide » A) FeS B)) Fe2S3 C) FeSQ3 D) Fe2(SO3)3 . | : 2 | 17. Which formula represents copper(I) oxide? A) CuO B) CuQ2 C)) CwO D) CwO2 \ y 18. What is the name of the polyatomic ion in the — compound Na2O2? « Oz A) hydroxide B) oxalate C) oxide 0) peroxide 4h 19. Which formula represents lead(II) cnreniated @)) PbCrQ4 C) Pb2CrO« A B) Pb(CrOs)2 D) Pb2(CrOs)s -uL Cc 20. What is the TUPAC name for the compound FeS? ‘, : + A) iron(II) sulfgee B) iron(IIl) sulfgeé Fe (S) iron(II) sulfide D) Iron(III) sulfide