front 1 HI is an Arrhenius acid because A) it is a polar molecule. B) it can dissolve in water. C) it produces hydronium ions in solution. D) it produces hydroxide ions in solution. | back 1 C) it produces hydronium ions in solution. |
front 2 NaOH is a Brønsted-Lowry base because A) it is a polar molecule. B) it can dissolve in water. C) it is a hydroxide donor. D) it is a proton acceptor. | back 2 D) it is a proton acceptor. |
front 3 The conjugate acid of H₂PO₄⁻ is A) H₃PO₄ B) HPO₄²⁻ C) PO₄³⁻ D) H₂PO₄ | back 3 A) H₃PO₄ |
front 4 The conjugate base of HPO₃²⁻ is A) HPO₃⁻ B) H₂PO₃⁻ C) PO₃³⁻ D) H₃PO₃ | back 4 C) PO₃³⁻ |
front 5 Consider the reaction below. Which species are conjugate acid/base pairs? HSO₃⁻ (aq) + HCN (aq) ⇌ H₂SO₃ (aq) + CN⁻ (aq) A) HSO₃⁻, CN⁻ B) HSO₃⁻, H₂SO₃ C) H₂SO₃, CN⁻ D) HCN, H₂SO₃ | back 5 B) HSO₃⁻, H₂SO₃ |
front 6 Consider the reaction below. Which species is(are) the Brønsted-Lowry acid(s)? HF (aq) + NH₃ (aq) ⇌ NH₄⁺ (aq) + F⁻ (aq) A) HF, NH₄⁺ B) NH₃, NH₄⁺ C) F⁻, NH₄⁺ D) HF, NH₃ | back 6 A) HF, NH₄⁺ |
front 7 Which of the following is a conjugate acid/base pair? A) H₂O, NH₃ B) NH₄⁺, H₃O⁺ C) H₃O⁺, NH₃ D) H₃O⁺, H₂O | back 7 D) H₃O⁺, H₂O |
front 8 Write the formula of the conjugate acid of the Brønsted-Lowry base, CCl₃COO⁻ | back 8 A) CCl₃COOH |
front 9 Write the formula of the conjugate acid of the Brønsted-Lowry base, CH₃NH₂ | back 9 A) CH₃NH₃⁺ |
front 10 Write the formula of the conjugate acid of the Brønsted-Lowry base, HCO₃⁻ | back 10 H₂CO₃ |
front 11 Write the formula of the conjugate acid of the Brønsted-Lowry base, HCO₃⁻ | back 11 H₂CO₃ |
front 12 Write the formula of the conjugate acid of the Brønsted-Lowry base, SO₄²⁻ | back 12 HSO₄⁻ |
front 13 Write the formula of the conjugate base of the Brønsted-Lowry acid, CCl₃COOH | back 13 CCl₃COO⁻ |
front 14 Write the formula of the conjugate base of the Brønsted-Lowry acid, HPO₄²⁻ | back 14 PO₄³⁻ |
front 15 Write the formula of the conjugate base of the Brønsted-Lowry acid, NH₄⁺ | back 15 NH₃ |
front 16 Write the acidic equilibrium equation for HBrO | back 16 HBrO(aq) + H₂O(l) ⇌ H₃O⁺(aq) + BrO⁻(aq) |
front 17 Write the acidic equilibrium equation for HC₂H₃O₂ | back 17 HC₂H₃O₂(aq) + H₂O(l) ⇌ H₃O⁺(aq) + C₂H₃O₂⁻(aq) |
front 18 Write the basic equilibrium equation for NH₃ | back 18 NH₃(aq) + H₂O(l) ⇌ OH⁻(aq) + NH₄⁺(aq) |
front 19 Write the basic equilibrium equation for PO₄³⁻ | back 19 PO₄³⁻(aq) + H₂O(l) ⇌ OH⁻(aq) + HPO₄²⁻(aq) |
front 20 Write the acidic equilibrium equation for C₃H₇COOH. | back 20 HA(aq) + H₂O(l) ⇌ A⁻(aq) + H₃O⁺(aq) |
front 21 Which of the following has the greatest mass? A) α particle B) neutron C) proton D) β⁻ particle E) neutrino | back 21 A) α particle |
front 22 The equation below is best described as ___________. ²³⁵₉₂U → ²³⁵₉₃Np + ⁰₋₁e A) alpha decay. B) beta decay. C) gamma emission. D) positron emission. | back 22 B) beta decay. |
front 23 The equation below is best described as ___________. ²¹⁰₈₄Po→ ⁴₂He + ²⁰⁶₈₂Pb A) alpha decay. B) beta decay. C) gamma emission. D) positron emission. | back 23 A) alpha decay. |
front 24 Which of the following symbols represents a beta particle? A) ⁰₊₁e B) ⁰₋₁e C) ⁴₂He D) γ | back 24 B) ⁰₋₁e |
front 25 Which of the following symbols represents an alpha particle? A) ⁰₊₁e B) ⁰₋₁e C) ⁴₂He D) γ | back 25 C) ⁴₂He |
front 26 Which of the symbols listed below can be used to represent a beta particle? I. ⁰₋₁e II. ⁰₊₁e III. ⁰₋₁β ----------------- A) I only B) II only C) III only D) I and II E) I and III | back 26 E) I and III |
front 27 What is the product of alpha emission from uranium-238? A) ²³⁴U B) ²³²Th C) ²³⁴Th D) ²³⁷Np E) ²³¹Pa | back 27 C) ²³⁴Th |
front 28 ²¹⁰Pb decays by emitting a β⁻ particle. What nuclide is produced? A) ²¹⁰Bi B) ²¹⁰Pb C) ²¹⁰Hg D) ²¹⁰Tl E) ²⁰⁶Hg | back 28 A) ²¹⁰Bi |
front 29 Complete the following nuclear decay process: ²³⁵₉₂U → ⁴₂He + ___ A) ²³⁹₉₄Pu B) ²³¹₉₄Pu C) ²³¹₉₂U D) ²³¹₉₀Th E) ²³⁹₉₀Th | back 29 D) ²³¹₉₀Th |
front 30 An unstable isotope of Re-191 is a beta producer. What is the other product of the reaction? A) W-191 B) Os-190 C) Re-192 D) Os-191 E) Pt-192 | back 30 D) Os-191 |
front 31 What is the balanced nuclear reaction for the following process? Iodine-131, used to treat hyperactive thyroid glands, decays by producing a β⁻ particle. A) ¹³¹₅₃I → ⁰₁e + ¹³¹₅₂Te B) ¹³¹ ⃰ ₅₃I → ⁰₀γ + ¹³¹₅₃I C) ¹³¹₅₃I → ⁴₂He + ¹²⁷₅₁Sb D) ¹³¹₅₃I → ¹₁H + ¹³⁰₅₂Te E) ¹³¹₅₃I → ⁰₋₁e + ¹³¹₅₄Xe | back 31 E) ¹³¹₅₃I → ⁰₋₁e + ¹³¹₅₄Xe |
front 32 he nuclide Rn-204 is the daughter nuclide resulting from the α decay of what parent nuclide? A) Po-200 B) Th-206 C) Hg-297 D) Ra-208 E) ⁴He | back 32 D) Ra-208 |
front 33 The Cs-131 nuclide has a half-life of 30 years. After 120 years, 3.0 g remain. What is the original mass of the Cs-131 sample in grams? | back 33 48 g |
front 34 10 g of a radioactive substance was placed in an airtight container 50 years ago. When the container is opened, only 2.5 g remains. What is the half-life of this material? A) 5 years B) 25 years C) 50 years D) 80 years E) 100 years | back 34 B) 25 years |
front 35 One of the radioactive isotopes used in chemical and medical research is iodine-125, which has a half-life of 61 days. How long would it take for 0.25 g to remain of a 1.00 g sample of iodine-125? A) 244 days B) 122 days C) 61 days D) 31 days+ | back 35 B) 122 days |
front 36 One of the radioactive isotopes used in chemical and medical research is sulfur-35, which has a half-life of 87 days. How many days would it take for 0.25 g to remain of a 1.00 g sample of sulfur-35? | back 36 174 days |
front 37 Polonium was discovered in uranium ores by Marie and Pierre Curie. Polonium-210 decays by emitting a single alpha particle. What nuclide is formed in this process? A) ²⁰⁶Pb B) ²¹⁰At C) ²⁰⁹Pb D) ²¹⁰Bi E) ²¹⁴Rn | back 37 A) ²⁰⁶Pb |
front 38 Which of the following processes decreases the atomic number by two? A) gamma-ray production B) beta production C) positron-particle production D) alpha-particle production E) proton production | back 38 D) alpha-particle production |
front 39 Which of the following processes decreases the atomic number by two? A) gamma-ray production B) beta production C) positron-particle production D) alpha-particle production E) proton production | back 39 D) alpha-particle production |
front 40 When ²³⁵U absorbs a neutron, it forms an unstable nuclide that ultimately fissions into smaller nuclides. What is this unstable nuclide? A) ²³¹Th B) ²³⁵Pa C) ²³⁶U D) ²³⁵Np E) ²³⁹Pu | back 40 C) ²³⁶U |
front 41 A significant difficulty in using fusion as an energy source is A) the high cost of the reactants. B) the lack of useful starting nuclides. C) the extreme conditions required to initiate and sustain fusion reactions. D) the high radioactivity of the product nuclei. E) the disposal of waste products. | back 41 C) the extreme conditions required to initiate and sustain fusion reactions. |
front 42 What type of nuclear process requires extremely high temperatures to occur? A) Fission B) Fusion C) Transmutation D) Neutron emission E) Gamma ray emission | back 42 B) Fusion |
front 43 When two He atoms undergo fusion in a star, the resulting element is: A) H B) Li C) Be D) He E) All of the above | back 43 C) Be |
front 44 Choose the incorrect statement about the fusion process. A) Fusion reactions power stars. B) Fusion is the basis of a hydrogen bomb. C) Fusion reactions require extreme temperatures to initiate. D) Fusion is the splitting of a nucleus into smaller nuclei. E) Fusion is the combining of two small nuclei into a bigger nucleus. | back 44 D) Fusion is the splitting of a nucleus into smaller nuclei. |
front 45 Which of the following is(are) the product(s) of the fusion reaction ²H + ³H -->? A) ¹H + ⁴H B) ⁴He + ¹₀n C) 3n + 2¹H D) ³H + ²H E) 5n + 2e⁻ | back 45 B) ⁴He + ¹₀n |
front 46 The process that powers stars is A) fission B) fusion C) neutron emission D) gamma ray emission E) alpha particle emission | back 46 B) fusion |
front 47 A nuclear reaction in which a larger nuclei is split apart into smaller nuclei is called a _____ reaction. A) combustion B) combination C) fission D) fusion | back 47 C) fission |
front 48 Which type of radiation has the greatest penetrating ability? A) alpha particle B) beta particle C) positron D) gamma ray E) all radiation has the same penetrating ability | back 48 D) gamma ray |
front 49 Which of the following represents the three main types of radiation ranked by increasing penetrating ability? A) alpha < beta < gamma B) alpha < gamma < beta C) beta < alpha < gamma D) beta < gamma < alpha E) gamma < beta < alpha | back 49 A) alpha < beta < gamma |