General Chemistry Exit Exam-Questions and Answers (by a Verified Tutor, 2020)
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Course
CHEM 12-3 (CHEM123)
Institution
Mapa Institute Of Technology
CHEM 12-3 General Chemistry Exit Exam-Questions and Answers/CHEM 12-3 General Chemistry Exit Exam-Questions and Answers/CHEM 12-3 General Chemistry Exit Exam-Questions and Answers
chem 12 3 general chemistry exit exam questions and answerschem 12 3 general chemistry exit exam questions and answerschem 12 3 general chemistry exit exam questions and answers
EXIT EXAM GENERAL CHEMISTRY.
Atomic Number, Mass Number and Isotopes
M 1. How many neutrons are there in an atom of lead whose mass number is 208?
A.82 C.208
B.126 D.290
M2. An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron)
A.15 p, 16 n, 15 e C.16 p, 31 n, 16 e
B.16 p, 15 n, 16 e D.32 p, 31 n, 32 e
M 3. Give the number of protons (p), electrons (e), and neutrons (n) in one atom of chlorine-37.
A.37 p, 37 e, 17 n C.17 p, 17 e, 20 n
B.17 p, 17 e, 37 n D.37 p, 17 e, 20 n
M4. A magnesium ion, Mg2+, has
A.12 protons and 13 electrons
B.24 protons and 26 electrons
M5. An aluminum ion, Al3+, has:
A.13 protons and 13 electrons
B.27 protons and 24 electrons
M6. An oxide ion, O2-, has:
A.8 protons and 10 electrons
B.10 protons and 8 electrons
M7. A sulfide ion, S2- , has:
A.16 protons and 16 electrons
B.32 protons and 16 electronsC.12 protons and 10 electrons
D.12 protons and 14 electrons
C.16 protons and 13 electrons
D.13 protons and 10 electrons
C.8 protons and 9 electrons
D.10 protons and 7 electrons
C.16 protons and 18 electrons
D.16 protons and 14 electrons
M 8. How many protons and electrons are present in one Br- ion?
A.35 p, 35 e C.35 p, 34 e
B.35 p, 36 e D.80 p, 81 e
Writing Chemical Formula
M 9. What is the formula for the ionic compound formed by calcium ions and nitrate ions?
A.Ca3N2 C.Ca2NO3
B.Ca(NO3)2 D.CaNO3
M 10.What is the formula for the ionic compound formed by calcium and selenium?
A.CaSe C.CaSe2
B.Ca2Se D.Ca3Se
M 11.What is the formula for the ionic compound formed by magnesium and iodine?
A.MgI C.MgI2
B.Mg2I D.MgI3
M 12.What is the formula for the binary compound formed by potassium and nitrogen?
A.KN C.K3N
B.K2N D.NK3
M13. Which is the correct formula for copper(II) phosphate?
A.Cu2PO4
B.Cu3(PO4)2
M14. Which is the correct formula for lead (IV) chloride?
A.Pb4Cl
B.PbCl2C.Cu2PO3
D.Cu(PO4)2
C.PbCl4
D.Pb2Cl4 M15. The chemical formula for iron(II) nitrate is
A.Fe2(NO3)3 C.Fe2N3
B.Fe(NO2)2 D.Fe(NO3)2
M16. Which of these choices is the formula for hydrobromic acid?
A.HBr C.HBrO2
B.HBrO D.HBrO3
M 17. The formula for calcium phosphate is
A.CaPO4 C.Ca2(PO4)3
B.Ca3(PO4)2 D.Ca3(PO3)2
M 18. The formula for magnesium sulfate is
A.MgS C.MgSO4
B.MnSO3 D.MnSO3
M19. The formula for sodium sulfide is
A.NaS C.Na2S
B.NaS2 D.Na4S2
Naming Compounds
M 20. The chemical name for ClO 3- is "chlorate ion". Therefore, the name of HClO 3 is
A.hydrochloric acid C.chlorous acid
B.hydrogen trioxychloride D.chloric acid
M21. The chemical name for ClO 2- is "chlorite ion". Therefore, the name of HClO 2 is
A.hydrochloric acid C.chlorous acid
B.hydrogen dioxychloride D.chloric acid
M 22. The correct name for NH 4NO3 is
A.ammonium nitrate C.ammonia nitrogen oxide
B.ammonium nitrogen trioxide D.hydrogen nitrogen oxide
M 23. The correct name for Ba(OH) 2 is
A.barium hydrogen oxide C.barium hydrate
B.boron hydroxide D.barium hydroxide
M 24. The correct name for KHCO 3 is
A.calcium bicarbonate C.potassium hydrogen carbonate
B.potassium carbonate D.calcium carbonate
M 25. The Stock system name for Mn 2O7 is
A.dimanganese heptaoxide C.manganese(II) oxide
B.manganese(VII) oxide D.manganese(II) oxide
M 26. The Stock system name for As 2S5 is
A.arsenic(V) sulfide C.arsenic(III) sulfide
B.diarsenic pentasulfide D.arsenic(V) sulfate
M 27. Consistent with vanadium being a transition metal, the name for VSO 4 should be
A.vanadium sulfide C.vanadium (I) sulfate
B.vanadium (I) sulfite D.vanadium (II) sulfate
M 28. The Stock system name for CrSO 3 is
A.chromium sulfide C.chromium(II) sulfate
B.chromium(II) sulfite D.chromium(III) sulfite
M 29. The Stock system name for CrO 3 is
A.chromium oxide C.chromium(III) trioxide
B.chromium(II) oxide D.chromium(III) oxide
M 30. The Stock system name for Cr 2O3 is
A.chromium(III) oxide C.chromium(VI) oxide
B.dichromium trioxide D.chromium trioxide
Calculating Average Atomic Mass
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