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Study Resources (Chemistry)

41) Which is a spectator ion from the following complete ionic equation: Ag+(aq) + NO3-(aq) + K+ (aq) + Br-(aq) → AgBr(s) + K+(aq) + NO3- (aq) A) Ag+ B) Br- C) K+ D) AgBr E) none of the above 42) Which of the following everyday substances does NOT typically contain an acid? A) lemons B) vinegar C) soap D) limes E).
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61) What is the formula mass of copper(II) fluoride? A) 101.55 B) 146.10 C) 90.00 D) 165.10 E) none of the above 62) Which of the following has the largest formula mass? A) CO2 B) SO2 C) NO2 D) SiO2 E) H2O 63) Which of the following compounds have the smallest formula mass? A) CO2 B) SO2 C) NO2 D) SiO2 E) H2O 64) A compound has a.
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11) Molecular elements do not exist in nature. 12) The element nitrogen normally exists in nature as a diatomic molecule. 13) Carbon dioxide is an example of a molecular compound. 14) The basic unit of an ionic compound is called the formula unit. 15) SO2 is an ionic compound. 16) Ionic compounds have a net.
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14) A strong electrolyte solution contains ionic compounds that completely dissociate in water. 15) An insoluble compound will partially dissolve in water. 16) When compounds containing polyatomic ions dissolve, the polyatomic ions usually dissolve as intact units. 17) Li+, Na+, K+ and NH4+ compounds are soluble. 18) Cl-, Br-, and I- are mostly insoluble. 19).
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21) An aqueous solution is: A) any liquid with another compound dissolved in it. B) an ionic compound with water dissolved in it. C) water with a molecular compound dissolved in it. D) water with another compound dissolved in it. E) none of the above 22) Which of the following compounds is INSOLUBLE? A) potassium acetate B) lithium.
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31) The net ionic equation for the reaction of sodium hydroxide plus hydrochloric acid is Na+ + Cl- ? NaCl. 32) An oxidation-reduction reaction must involve reaction with oxygen. 33) Evidence of a redox reaction is when a substance reacts with elemental oxygen. 34) Evidence of a redox reaction is when one substance transfers.
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Multiple Choice Questions 1) The average global temperature depends on all factors EXCEPT what? A) the amount of incoming sunlight B) the amount of outgoing heat lost to space C) the amount of greenhouse gases D) the angle of the earth's surface in relation to the incoming sunlight E) All of the above are factors. 2) Which.
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21) The names of the elements whose symbols are Si, P, Mn, and S are respectively, A) silicon, potassium, magnesium, and sulfur. B) silver, phosphorus, magnesium, and sulfur. C) silicon, phosphorus, manganese, and sulfur. D) silicon, phosphorus, magnesium, and sulfur. E) silicon, potassium, magnesium, and sodium. 22) Metals are located where on the periodic table? A) left.
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21) Fluorine is considered which of the following? A) atomic element B) molecular element C) molecular compound D) ionic compound E) none of the above 22) Ammonium fluoride is considered which of the following? A) atomic element B) molecular element C) molecular compound D) ionic compound E) none of the above 23) Which of the following species is a molecular element? A) neon B).
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31) What type of a reaction occurs when a potassium nitrate solution is mixed with a barium acetate solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction 32) A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous solution of A) iron(III) chloride. B).
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Multiple Choice Questions 1) What is the correct value for Avogadro's number? A) 6.022 × 1023 B) 6.022 × 1033 C) 6.023 × 1022 D) 6.022 × 102.3 E) none of the above 2) Which of the following statements about the mole is FALSE? A) The size of a mole of atoms has a reasonable mass. B) A mole.
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True/False Questions 1) When elements combine to form compounds, their properties only change slightly. 2) The properties of a compound are an average of the properties of the individual elements. 3) Life could not exist with just 91 elements if they did not combine to form compounds. 4) Although some substances we encounter in.
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Multiple Choice Questions 1) A reaction which forms a gaseous product is an example of a(n)________. A) oxidation-reduction reaction B) combustion reaction C) precipitation reaction D) gas evolution reaction E) none of the above 2) A reaction which forms a solid product is an example of a(n)________. A) oxidation-reduction reaction B) combustion reaction C) precipitation reaction D) gas evolution reaction E) none.
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True/False Questions 1) The chemical formula clearly indicates the relationship between the mass of each element in the formula. 2) Mass is used as a method of counting atoms. 3) The numerical value of the mole is defined as being equal to the number of atoms in exactly 12 grams of pure carbon-12. 4).
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True/False Questions 1) When the elements are arranged in order of increasing number of protons, certain sets of properties recur periodically. 2) The early scientists who developed the quantum-mechanical model were bewildered by the model and it altered our fundamental view of matter. 3) Light is a type of matter. 4) Light travels through.
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Multiple Choice Questions 1) Which of the following statements about atoms is FALSE? A) Atoms compose all matter. B) Atoms are responsible for the sensation of smell. C) Atoms are the basic building block of nature. D) An atom is the smallest identifiable unit of an element. E) All of the above statements are true. 2) Which.
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True/False Questions 1) Greenhouse gases affect the temperature of the earth by blocking sunlight from reaching earth. 2) Global warming is due to the greenhouse gases preventing heat from Earth escaping into space. 3) The primary greenhouse gas is carbon dioxide. 4) The primary source for the rising carbon dioxide levels is respiration of.
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51) What would the formula of diiodine pentasulfide be? A) I5S2 B) I2S5 C) I4S9 D) I2S7 E) none of the above 52) What is the correct formula for the molecular compound heptaphosphorus octafluoride? A) P5F8 B) P 7F6 C) P6F7 D) P7F8 E) none of the above 53) What is the proper name for HBr (aq)? A) hydrobromous acid B) hydrousbromic acid C) hydrobromic.
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51) Which of the following is already in its empirical formula? A) C22H34O10 B) C6H6 C) C6H12O3 D) C5H12O2 E) none of the above 52) The chemical formula CH2O can be classified as: A) not enough information B) molecular only. C) empirical only. D) empirical, possibly molecular. E) none of the above 53) A chromium oxide compound contains 104.0 grams of chromium.
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Multiple Choice Questions 1) When elements combine to form compounds, A) their properties are an average of all elements in the compound. B) their properties change completely. C) their properties do not change. D) their properties are completely random. E) none of the above 2) The first chemist to formally state the law of constant composition was.
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21) The key to predicting a precipitation reaction is the formation of an insoluble compound from soluble compounds. 22) A precipitation reaction will occur when sodium chloride is mixed with potassium nitrate. 23) A precipitate will form when you mix solutions of potassium chloride and lead nitrate. 24) We remove the spectator ions.
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51) What type of a reaction occurs when a hydrochloric acid solution is mixed with a sodium bicarbonate solution? A) precipitation B) acid-base neutralization C) oxidation-reduction D) gas evolution E) no reaction 52) Which of the following would NOT be a product from mixing hydrochloric acid with a solution of sodium sulfite? A) H2O (l) B) SO2 (g) C).
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11) Which of the following statements about the nature of electrical charge is FALSE? A) Electrical charge is a fundamental property of protons and electrons. B) Positive and negative electrical charges attract each other. C) Positive-positive or negative-negative charges repel each other. D) Positive and negative charges cancel each other so that a proton.
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41) The formula for potassium chlorate is KClO3. The formula for magnesium chloride is MgCl2. What is the formula for magnesium chlorate? A) MgClO3 B) Mg2ClO3 C) Mg(ClO3)2 D) Mg2(ClO3)3 E) none of the above 42) The charge of a vanadium ion in the compound V2O5 is: A) 5+ B) 2+ C) 10+ D) 10- E) none of the above 43) What.
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True/False Questions 1) The reaction of baking soda and vinegar to produce carbon dioxide gas is an example of a precipitation reaction. 2) The reaction of carbonate ion with magnesium ion to form solid magnesium carbonate is an example of an oxidation reduction reaction. 3) Combustion reactions are a subcategory of oxidation-reduction reactions. 4).
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21) The correct formula for calcium fluoride is CaF3. 22) Ionic compounds are usually made up of a metal and a nonmetal. 23) The ionic compound MgO is named manganese oxide. 24) The name of KNO3 is potassium nitratide. 25) The correct formula for sodium permanganate is NaMgO4. 26) Type II metal cations are usually.
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