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19 Nov 2019
Which of the following would be classified as a pure substance(s)? a) elements b) compounds c) pure water d) carbon dioxide e) all of these Aqueous solutions of ammonium phosphate and calcium chloride are mixed together. When the chemical equation is balanced using the smallest possible integers, what is the sum of all coefficients? a) 8 b) 9 c) 10 d) 11 c) 12 A sample of oxygen gas has a volume of 4.50 L at 27 degree C and 800.0 torr. How many oxygen molecules does It contain? a) 1.16 times 10^23 b) 5.8 times 10^22 c) 2.32 times 10^24 d) 1.15 times 10^22 e) None of these Aqueous solutions of sodium sulfide and copper(II) chloride are mixed together. Which statement is correct? a) Both NaCI and CuS precipitate from solution. b) No precipitate forms. c) CuS will precipitate from solution. d) NaCI will precipitate from solution. e) No reaction will occur. Which of the following compounds is insoluble in water? a) Na_2 S b) K_3 PO_4 c) Pb(NO_3)_2 d) CaCl_2 e) All of these are soluble in water Given the following reaction, suppose 2 moles of A are reacted with 1 mole of B. Which of the following is true? 3A + B rightarrow C + D a) A is the limiting reactant because of Its higher molar mass. b) A is the limiting reactant because you need 3 moles of A and have 2. c) B is the limiting reactant because you have fewer moles of B than A. d) B is the limiting reactant because 3 A molecules react with 1 B molecule. e) Neither reactant is limiting.
Which of the following would be classified as a pure substance(s)? a) elements b) compounds c) pure water d) carbon dioxide e) all of these Aqueous solutions of ammonium phosphate and calcium chloride are mixed together. When the chemical equation is balanced using the smallest possible integers, what is the sum of all coefficients? a) 8 b) 9 c) 10 d) 11 c) 12 A sample of oxygen gas has a volume of 4.50 L at 27 degree C and 800.0 torr. How many oxygen molecules does It contain? a) 1.16 times 10^23 b) 5.8 times 10^22 c) 2.32 times 10^24 d) 1.15 times 10^22 e) None of these Aqueous solutions of sodium sulfide and copper(II) chloride are mixed together. Which statement is correct? a) Both NaCI and CuS precipitate from solution. b) No precipitate forms. c) CuS will precipitate from solution. d) NaCI will precipitate from solution. e) No reaction will occur. Which of the following compounds is insoluble in water? a) Na_2 S b) K_3 PO_4 c) Pb(NO_3)_2 d) CaCl_2 e) All of these are soluble in water Given the following reaction, suppose 2 moles of A are reacted with 1 mole of B. Which of the following is true? 3A + B rightarrow C + D a) A is the limiting reactant because of Its higher molar mass. b) A is the limiting reactant because you need 3 moles of A and have 2. c) B is the limiting reactant because you have fewer moles of B than A. d) B is the limiting reactant because 3 A molecules react with 1 B molecule. e) Neither reactant is limiting.
huyenanhhLv1
13 Jul 2022
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Hubert KochLv2
9 Jul 2019
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