Chemistry B Quiz 4 Of 4

35 Questions | By Klt7560 | Updated: Mar 21, 2022 | Attempts: 1610

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This is the last Chemistry prep quiz before the End of trimester exam tomorrow.

Questions and Answers

1.

Which of the following includes an example of a chemical property of an element?
- A.
  
  Aluminum is a solid at room temperature and is a poor thermal insulator.
- B.
  
  Sulfur is not shiny and is not malleable.
- C.
  
  Sodium is a solid at room temperature and reacts with other elements.
- D.
  
  Silicon is shiny and is a poor conductor of electricity.
2.
- A.
  
  A Thermal energy → kinetic energy
- B.
  
  B Kinetic energy → potential energy
- C.
  
  C Chemical energy → thermal energy
- D.
  
  D Potential energy → chemical energy
3.
- A.
  
  Nuclear fusion is occurring because many smaller nuclei are being fused.
- B.
  
  Nuclear fission is occurring because large amounts of energy are being absorbed.
- C.
  
  Nuclear fusion is occurring because many energetic neutrons are being emitted.
- D.
  
  Nuclear fission is occurring because a nucleus is being split into smaller nuclei.
4.
- A.
  
  They consist of barium chloride anhydrous.
- B.
  
  They consist of barium chloride dihydrate.
- C.
  
  They consist of barium chloride hexahydrate.
- D.
  
  They consist of barium chloride heptahydrate.
5.

Heart cells require a certain balance of sodium and potassium ions to function. The blood, which is approximately 83% water, carries these two types of ions to the heart. The property of water that allows it to carry ions to the heart is its —
- A.
  
  Molecular mass
- B.
  
  Specific heat
- C.
  
  Polarity
- D.
  
  Density
6.

The equation below represents a chemical reaction that produces a gas. 2Na(s) + 2H O(l) → 2NaOH(aq) + H (g) 22 What is the theoretical yield in liters of H2 gas if 5.00 g of Na are completely reacted and the H2 gas is collected at STP?
- A.
  
  0.109 L
- B.
  
  2.44 L
- C.
  
  4.88 L
- D.
  
  5.09 L
7.
- A.
  
  F
- B.
  
  G
- C.
  
  H
- D.
  
  J
8.
- A.
  
  Volume
- B.
  
  Mass
- C.
  
  Boiling point
- D.
  
  Number of moles
9.

Which mixture can be separated through filtration because one of the substances is insoluble in water?
- A.
  
  NaClO and Pb(ClO) 3
- B.
  
  Na2SO4 and SrSO4
- C.
  
  NaNO and Pb(NO)
- D.
  
  NaCHO and Pb(CHO) 2
10.
11.

Some students used a variety of procedures to investigate four liquid samples. The students recorded the following information. • When Sample W was cooled, solid particles settled out of the liquid. • The mass and volume of Sample X were measured, and the density of Sample X was calculated to be 1.6 g/mL. • Sample Y was heated, and the temperature was recorded. All the liquid boiled away at the same temperature and left no residue in the container. • When a dilute acid was added to Sample Z, gas bubbles formed and rapidly rose to the surface of the liquid. Based on these observations, which sample was clearly identifiable as a pure substance?
- A.
  
  Sample W
- B.
  
  Sample X
- C.
  
  Sample Y
- D.
  
  Sample Z
12.

What is the electron configuration for an atom of germanium at ground state?
- A.
  
  [Ar]4s2 3d10 4p2
- B.
  
  [Ar]4s2 4d10 4p2
- C.
  
  [Kr]4s2 3d10 4p2
- D.
  
  [Kr]4s2 4d10 4p2
13.

Which of the following correctly matches a compound with its molecular geometry?
- A.
  
  Water (H2O): linear
- B.
  
  Carbon dioxide (CO ): tetrahedral 2
- C.
  
  Ammonia (NH3): trigonal planar
- D.
  
  Methane (CH4): tetrahedral
14.

A sample of a compound is added to distilled water in a clean beaker. A reaction occurs, and the water temperature drops rapidly. Which of the following statements is best supported by this observation?
- A.
  
  An endothermic reaction occurred.
- B.
  
  A dehydration reaction occurred.
- C.
  
  The water was originally warmer than the compound.
- D.
  
  The beaker was contaminated by another compound.
15.

Use the equation below to answer the following question. BaCl (aq) + Na SO (aq) → 2NaCl(aq) + BaSO (s) 2244 The theoretical yield of BaSO4 is 58.35 g. If 44.34 g of BaSO4 are produced from the reaction shown above, what is the percent yield of BaSO4?
- A.
  
  31.67%
- B.
  
  52.03%
- C.
  
  75.99%
- D.
  
  85.17%
16.

When zinc is exposed to air, zinc oxide is produced. What happens in this reaction?
- A.
  
  Zinc is oxidized, and oxygen is reduced.
- B.
  
  Zinc is reduced, and oxygen is oxidized.
- C.
  
  Both zinc and oxygen are oxidized.
- D.
  
  Both zinc and oxygen are reduced.
17.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
18.

How many molecules are in 0.500 mole of N2O5?
- A.
  
  1.20×1023 molecules
- B.
  
  3.01×1023 molecules
- C.
  
  6.02×1023 molecules
- D.
  
  3.01×1024 molecules
19.
- A.
  
  A heterogeneous mixture
- B.
  
  An element
- C.
  
  A compound
- D.
  
  A homogeneous mixture
20.
- A.
  
  544 mm Hg
- B.
  
  784 mm Hg
- C.
  
  1830 mm Hg
- D.
  
  6212 mm Hg
21.

Which of these statements is an accurate description of the ionization energies of elements in the periodic table?
- A.
  
  The ionization energy of lithium is greater than that of potassium.
- B.
  
  The ionization energy of iodine is greater than that of fluorine.
- C.
  
  The ionization energy of magnesium is greater than that of sulfur.
- D.
  
  The ionization energy of krypton is greater than that of neon.
22.

In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?
- A.
  
  The nucleus is negatively charged.
- B.
  
  The atom is a dense solid and is indivisible.
- C.
  
  The mass is conserved when atoms react chemically.
- D.
  
  The nucleus is very small and the atom is mostly empty space.
23.
- A.
  
  Liquid condenses on a cold glass rod when gas from the test tube on the left is released.
- B.
  
  A gas probe indicates that the water in the beaker contains dissolved nitrogen and oxygen.
- C.
  
  A burning wood splint placed above the mouth of the test tube on the right glows brighter when some gas is released from the test tube.
- D.
  
  The temperature of the wire connected to the battery increases.
24.
- A.
  
  Trihydrogen phosphite
- B.
  
  Phosphoric acid
- C.
  
  Phosphorous hydroxide
- D.
  
  Phosphorous acid
25.
- A.
  
  Indium (In), because it has a slightly higher atomic mass than aluminum (Al), and tin (Sn), because it has a slightly higher atomic mass than silicon (Si)
- B.
  
  Cadmium (Cd), because it has chemical properties similar to those of zinc (Zn), and mercury (Hg), because it has chemical properties similar to those of arsenic (As)
- C.
  
  Antimony (Sb), because it has a slightly higher atomic mass than zinc (Zn), and bismuth (Bi), because it also has a higher atomic mass than zinc (Zn)
- D.
  
  Gallium (Ga), because it has chemical properties similar to those of aluminum (Al), and germanium (Ge), because it has chemical properties similar to those of silicon (Si)