Question

Question7.7. (TCO 2) An isotope ofpotassium has a mass number of 39. How many neutrons are present inthis isotope?(Points : 4)

19
20
24
44
58

Question8.8. (TCO 3) Hydrogen combineswith oxygen to form water. Which of the statements below bestdescribes the bond that forms between hydrogen and oxygen? (Points: 4)

It is an ionic bond in whichthe hydrogen and oxygen atoms are held together by sharingelectrons.
It is an ionic bond in whichthe hydrogen atom accepts electrons from the oxygen atom.
It is a covalent bond in whichthe hydrogen atom donates electrons to the oxygen atom.
It is a covalent bond in whichthe hydrogen atom accepts electrons from the oxygen atom.
It is a covalent bond in whichthe hydrogen and oxygen atoms are held together by sharingelectrons.

Question9.9. (TCO 3) Atom X forms a -2anion. Atom Y forms a +1 cation. Which is the overall charge of thepolyatomic ion XY₄? (Points : 4)

0
-1
+4
+2
+1

Question10.10. (TCO 3) Which of thestatements about transition metals is true? (Points : 4)

Transition metals can gain orlose electrons to form anions or cations.
Transition metals can gain avariable number of electrons to form two or more differentanions.
All transition metals form atleast two different ions.
All of the above
None of the above

Question11.11. (TCO 4) How much 0.70 MHNO₃
could you make from 200 mL of 1.40 M HNO₃? (Points :4)

100 mL
196 mL
400 mL
83 mL
0.075 mL

15. (TCO 5)Hydrocarbons can be classified as saturated or unsaturated. How arethese two classes of hydrocarbons different? (Points : 4)

More hydrogen atoms could beadded to an unsaturated hydrocarbon.
Unsaturated hydrocarbonscontain heteroatoms.
Saturated hydrocarbons arelonger.
Saturated hydrocarbons containdouble or triple covalent bonds.
Saturated hydrocarbons aresolid at room temperature.

Question18.18. (TCO 6) During osmosisacross a semipermeable membrane, water will _____. (Points :4)

exhibit a net movement to theside with lower water concentration
exhibit a net movement to theside with higher water concentration
exhibit a net movement to theside with lower solute concentration
exhibit an equal movement inboth directions across the membrane
not cross themembrane

Question19.19. (TCO 7) Jasmine isrunning in a 10 K race. After the halfway point, her muscles needmore oxygen than her blood can provide. Which happens now? (Points: 4)

Her muscles are workinganaerobically.
She is past her aerobiccapacity.
Her muscle cells startproducing lactic acid.
All of the above
None of the above

Question21.21. (TCO 7) Which of thefollowing statements is incorrect? (Points : 4)

Oxygen is a product ofphotosynthesis; carbon dioxide is a product of cellularrespiration.
Oxidation is the gain ofelectrons; reduction is the loss of electrons.
Lactic acid is a product ofanaerobic respiration; ethyl alcohol is a product offermentation.
Oxidation is the loss ofelectrons; reduction is the gain of electrons.
Glucose is a product of aerobicrespiration; lactic acid is a product of anaerobicrespiration.

Question22.22. (TCO 7) Which of thefollowing summarizes the process of aerobic cellular respiration?(Points : 4)

Glucose > lactic acid +energy
Energy + carbon dioxide + water> glucose + oxygen + water
Glucose > ethyl alcohol +carbon dioxide + energy
Glucose + lactose >galactose + water
Glucose + oxygen > carbondioxide + water + energy

Question23.23. (TCO 7) The first stageof aerobic respiration is _____. (Points : 4)

the Calvin cycle
the electron transportchain
the citric acid cycle
lactic acid fermentation
glycolysis

24.

We often speak of aerobic respiration. This meansthe respiration is occurring in the presence of _____. (Points :4)

oxygen
carbondioxide
ATP
light
carbohydrate

Question25.25. (TCO 7) Duringfermentation, _____ is _____. (Points : 4)

NADH; reduced
NAD⁺; oxidized
NADH; oxidized
pyruvate; oxidized
ethanol; oxidized

Question9.