True/False
Indicate whether the sentence or statement is true or
false.
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1.
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The mole ratio is a comparison of how many moles of one substance are
required to participate in a chemical reaction with another substance, based on the balanced chemical
equation.
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2.
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The limiting reagent limits the amount of product formed in a chemical
reaction.
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3.
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A cation is a negatively charged atom.
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4.
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In a balanced chemical equation, the total mass of the reactants is equal to the
total mass of the products.
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5.
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If the temperature at which a reaction occurs increases, the number of
collisions decreases.
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6.
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The charge of fluorine in an ionic compound is always -3.
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7.
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When an atom gains electrons, it becomes positively charged.
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8.
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Pressure is a direct result of collisions between gas particles and the walls of
their container.
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Multiple Choice
Identify the letter of the choice that best
completes the statement or answers the question.
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9.
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The symbols for units of length in order from smallest to largest are
a. | m, cm, mm, km. | c. | km, mm, cm, m. | b. | mm, m, cm, km. | d. | mm, cm, m, km. |
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10.
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Which of the following is the right side of the equation for dissolving
Al(NO3)3?
a. | Al+ + (NO3)3– | c. | Al3+ +
NO33– | b. | Al3+(aq) +
3NO3–(aq) | d. | Al3–(aq) +
3NO3+(aq) |
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11.
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If 0.5 L of O2(g) reacts with H2 to produce 1 L of
H2O(g), what is the volume of H2O(g) obtained from 1 L of
O2(g)?
a. | 0.5 L | c. | 2 L | b. | 1.5 L | d. | Cannot be
determined |
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12.
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In an equation, the symbol for a substance in water solution is followed
by
a. | (1). | c. | (aq). | b. | (g). | d. | (s). |
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13.
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The volume of a sample of helium is 4.5 mL at 20.0°C and 203.0 kPa. What
will its volume be in the figure?  a. | 2.25 mL | c. | 4.34 mL | b. | 3.78 mL | d. | 6.85 mL |
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14.
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Which is NOT an appropriate unit for measuring density?
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15.
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The density of aluminum is 2.70 g/cm3. The volume of a solid piece of
aluminum is 1.50 cm3. Find its mass.
a. | 1.50 g | c. | 2.70 g | b. | 1.80 g | d. | 4.05 g |
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16.
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What is the electron configuration for nitrogen, atomic number 7?
a. | 1s2 2s2 2p3 | c. | 1s2 2s3 2p1 | b. | 1s2 2s3 2p2 | d. | 1s2 2s2
2p2 3s1 |
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17.
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Helium-4 and helium-3 are
a. | isotopes. | c. | compounds. | b. | different elements. | d. | nuclei. |
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18.
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Hydrofluoric acid reacts with 31.3 g of silica to produce hexafluorosilicic
acid. Determine the percent yield of H2SiF6 if the actual yield is 60.3
g.
a. | 0.818% | c. | 31.8% | b. | 12.2% | d. | 81.8% |
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19.
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The nucleus of most atoms is composed of
a. | tightly packed protons. | b. | tightly packed neutrons. | c. | tightly packed
protons and neutrons. | d. | loosely connected protons and
electrons. |
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20.
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1.06 L of water is equivalent to
a. | 0.001 06 mL. | c. | 106 mL. | b. | 10.6 mL. | d. | 1060 mL. |
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21.
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The density of a substance undergoes the greatest change when the substance
changes from a
a. | liquid to a gas. | c. | solid to a liquid. | b. | liquid to a solid. | d. | a molecular solid to an ionic
solid. |
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22.
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The measurement that has been expressed to four significant figures is
a. | 0.0020 mm. | c. | 30.00 mm. | b. | 0.004 02 mm. | d. | 402.10 mm. |
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23.
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Which equation is NOT balanced?
a. | 2H2 + O2 →
2H2O | b. | 4H2 + 2O2 →
4H2O | c. | H2 + H2 + O2 →
H2O + H2O | d. | 2H2 + O2 → H2O |
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24.
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When 64.4 is divided by 72.90, the correct number of significant figures in the
result is
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25.
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An object has a mass of 26.94 grams and a volume of 2.568 cubic centimeters.
What material is it likely to be made of? | Substance | iron | gold | silver | copper | | Density
(g/cm3) | 7.874 | 19.32 | 10.49 | 8.92 | | | | | |
a. | Iron | c. | Silver | b. | Gold | d. | Copper |
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26.
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A compound has the formula X3Y. For every 15 X atoms present in this
compound, how many Y atoms are there?
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27.
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Which is the name of the kind of solid substance formed in this
figure?  a. | aqueous | c. | coordinate complex | b. | precipitate | d. | synthesis |
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28.
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Elements to the right side of the periodic table (p-block elements) have
properties most associated with
a. | gases. | c. | metals. | b. | nonmetals. | d. | metalloids. |
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29.
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The element that has the greatest electronegativity is
a. | oxygen. | c. | chlorine. | b. | sodium. | d. | fluorine. |
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30.
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How many grams of O2 are required to produce 358.5 grams of ZnO?
2Zn + O2 → 2ZnO
a. | 1302 g | c. | 29.1 g | b. | 14.5 g | d. | 70.5 g |
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31.
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Which is the correct molar mass for the compound CaBr2?
a. | 120 g/mole | c. | 240 grams | b. | 200
moles | d. | 200
g/mole |
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32.
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A negative ion is known as a(n)
a. | ionic radius. | c. | cation. | b. | valence electron. | d. | anion. |
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33.
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A gas is confined in a steel tank with a volume of 6.982 L. At 20.20°C, the
gas exerts a pressure of 8.532 atm. After heating the tank, the pressure of the gas increases to
10.406 atm. What is the temperature of the heated gas?
a. | –32.60°C | c. | 84.59°C | b. | 24.63°C | d. | 92.64°C |
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34.
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The number of valence electrons in Group 17 elements is
a. | 7. | c. | 17. | b. | 8. | d. | equal to the period
number. |
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35.
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How many moles of Al would be produced from 20 moles of
Al 2O 3? Al2O3
→
Al + O2
a. | 10 moles | c. | 40 moles | b. | 20 moles | d. | 4 moles |
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36.
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A chemical bond results from the mutual attraction of the nuclei of atoms
and
a. | electrons. | c. | neutrons. | b. | protons. | d. | dipoles. |
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37.
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What principle states that atoms tend to form compounds so that each atom can
have eight electrons in its outermost energy level?
a. | rule of eights | c. | configuration rule | b. | Avogadro principle | d. | octet rule |
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38.
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Which is the correct formula for the compound Manganese (III) Fluoride?
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39.
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Name the compound CuCO3.
a. | copper(I) carbonate | c. | cuprous carbide | b. | cupric trioxycarbide | d. | copper(II)
carbonate |
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40.
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The electron configuration of nitrogen is 1s2
2s2 2p3. How many more electrons does nitrogen need to satisfy
the octet rule?
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41.
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What is the Lewis structure for hydrogen chloride, HCl?
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42.
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How many atoms of fluorine are present in a molecule of carbon tetrafluoride,
CF4?
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43.
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What is the formula for barium hydroxide?
a. | BaOH | c. | Ba(OH)2 | b. | BaOH2 | d. | Ba(OH) |
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44.
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What is the metallic ion in copper(II) chloride?
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45.
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Which element has a molar mass of 30.974 g/mol?
a. | Potassium | c. | Gallium | b. | Phosphorus | d. | Palladium |
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46.
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The number of significant figures in the measurement 0.000 305 kg is
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47.
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The molar mass of H2O is 18.015 g/mol. How many grams of
H2O are present in 0.20 mol?
a. | 0.2 g | c. | 35.9 g | b. | 3.6 g | d. | 89.9 g |
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48.
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When the limiting reactant in a chemical reaction is completely used, the
a. | excess reactants begin combining. | c. | reaction speeds
up. | b. | reaction slows down. | d. | reaction stops. |
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49.
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How many Mg2+ ions are found in 1.00 mol of MgO?
a. | 3.01 × 1023 | c. | 12.04 × 1023 | b. | 6.02 ×
1023 | d. | 6.02 × 1025 |
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50.
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Which is the mass of 8 moles of sodium
chloride? a. | 7.3 grams | c. | 0.137 g/mole | b. | 468 grams | d. | 468 moles |
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51.
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In writing an equation that produces hydrogen gas, the correct representation of
hydrogen gas is
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52.
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What is the small whole number that appears in front of a formula in a chemical
equation?
a. | a subscript | c. | a ratio | b. | a superscript | d. | a coefficient |
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53.
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To balance a chemical equation, it may be necessary to adjust the
a. | coefficients. | c. | formulas of the products. | b. | subscripts. | d. | number of products. |
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54.
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According to the kinetic-molecular theory, particles of matter
a. | are in constant motion. | c. | have different
colors. | b. | have different shapes. | d. | are always fluid. |
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55.
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For the reaction Cl2 + 2KBr → 2KCl +
Br2, calculate the percent yield if 200. g of chlorine react with excess potassium bromide
to produce 410. g of bromine.
a. | 73.4% | c. | 91.0% | b. | 82.1% | d. | 98.9% |
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56.
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Which substance has the lowest density?
a. | H2O(g) | c. | Hg(l) | b. | H2O(l) | d. | Hg(g) |
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57.
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What does the constant bombardment of gas molecules against the inside walls of
a container produce?
a. | temperature | c. | pressure | b. | density | d. | diffusion |
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58.
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Standard temperature is exactly
a. | 100˚C. | c. | 0˚C. | b. | 273˚C. | d. | 0 K. |
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59.
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Standard pressure is exactly
a. | 1 atm. | c. | 101.325 atm. | b. | 760 atm. | d. | 101 atm. |
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60.
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What is the formula for aluminum sulfate?
a. | AlSO4 | c. | Al2(SO4)3 | b. | Al2SO4 | d. | Al(SO4)3 |
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61.
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The volume of a gas is 93 mL when the temperature is 91˚C. If the
temperature is reduced to 0˚C without changing the pressure, what is the new volume of the
gas?
a. | 70 mL | c. | 120 mL | b. | 100 mL | d. | 273 mL |
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62.
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Equal volumes of diatomic gases under the same conditions of temperature and
pressure contain the same number of
a. | protons. | c. | molecules. | b. | ions. | d. | Dalton's "ultimate
particles." |
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63.
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Gold is reacted with chlorine gas according to the reaction 2 Au + 3
Cl 2 → 2 AuCl 3. Use the data in the table to
determine the percent yield of gold chloride. | Mass of Gold | Mass of
Chlorine | Theoretical Yield | Actual Yield | | 39.4 g | 21.3
g | ? | 35.2 g | | | | |
a. | 60.7 % | c. | 58.1 % | b. | 54.1 % | d. | 51.4 % |
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64.
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Which is the term used for the measurement of the average kinetic energy of the
particles of a substance?
a. | density | c. | length | b. | temperature | d. | mass |
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65.
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Which value has only 4 significant digits?
a. | 6.930 | c. | 8450 | b. | 0.0450 | d. | 0.392 |
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66.
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Which ion is this atom most likely to form? 
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67.
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What is the correct formula for the compound formed between magnesium and the
phosphate ion?
a. | MgPO4 | c. | Mg3(PO4)2 | b. | Mg3PO2 | d. | MgP2O8 |
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68.
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Which is the correct name for the compound FeS?
a. | Iron Sulfide | c. | Iron (II) Sulfide | b. | Iron (I) Sulfide | d. | Iron (II) Sulfide
(II) |
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69.
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Which is the correct name for the compound CaClO2?
a. | Calcium Chloride | c. | Calcium Chlorite | b. | Calcium Chloroxide | d. | Calcium
Chlorate |
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Compounds | | Soluble in Water | Insoluble in Water | | NaCl | AgCl | | Mg(NO3)2 | CuCl | | K2CO3 | BaSO4 | | Na2CO3 | SrSO4 | | MgaSO4 | MgCO3 | | CaSO4 | CaCO3 | | AgNO3 | PbF2 | | |
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70.
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Which are the spectator ions in the reaction shown?  a. | Cl-, Na+, NO3- | c. | Ag+,
Cl- | b. | Ag+, Na+, NO3- | d. | Na+,
NO3- |
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71.
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How many total atoms are in 4Ca3(PO4)2?
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72.
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Which type of reaction is Al + O2 → Al2O3?
a. | synthesis | c. | single replacement | b. | decomposition | d. | combustion |
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73.
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Find the formula for the compound that contains 72.40% iron and 27.60%
oxygen.
a. | FeO | c. | Fe3O4 | b. | Fe2O3 | d. | FeO2 |
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74.
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How many grams of bromine are required to react
completely with 37.4 grams aluminum chloride?
AlCl3 + Br2 → AlBr3 +
Cl2 a. | 33.6 g | c. | 29.9 g | b. | 134.5 g | d. | 67.2 g |
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75.
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Gas is confined in a metal tank in the figure. At 20.20 °C, the gas exerts a pressure of 8.532 atm. After heating the tank, the
pressure of the gas increases to 10.406 atm. What is the temperature of the heated gas?  a. | -32.60°C | c. | 84.59°C | b. | 24.63°C | d. | 92.64°C |
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