CH 4 C 3 H 4 C 2 H 4 C 2 H 6 023 points QUESTION 14 1 When balancing the

Ch 4 c 3 h 4 c 2 h 4 c 2 h 6 023 points question 14 1

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CH 4 C 3 H 4 C 2 H 4 C 2 H 6 0.23 points QUESTION 14 1. When balancing the following equation, what is the coefficient of oxygen? H 2 + O 2 → H 2 O 3 1 2 0 4 0.23 points QUESTION 15 1. Lead(II) sulfide was once used in glazing earthenware. It will react with hydrogen peroxide to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide? PbS + 4 H 2 O 2 → PbSO 4 + 4 H 2 O
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16.3 g 65.1 g 91.g 150 g 0.23 points QUESTION 16 1. If barium metal and 22.0g nitrogen gas are obtained from heating 87.6g of Ba(N 3 ) 2 , what is the mass percent yield of nitrogen gas, N 2 ? Hint: work out the stoichiometry of the reaction first A . 33. 2 B . 19. 9 C . 66. 2 D . 59. 6 E. 11. 1 0.23 points QUESTION 17 1. How many fluorine atoms are there in 65 g of CF 4 ? 4.45 x 10 23 atoms 1.78 x 10 24 atoms 4.0 atoms 1.78 x 10 22 atoms 1.11 x 10 23 atoms 0.23 points QUESTION 18 1. Which one of the following compounds is a weak electrolyte? KCl HCl
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NH 3 N 2 C 6 H 12 O 6 (gluco se) 0.23 points QUESTION 19 1. Considering what you know about the electron configuration of atoms and ions, which of the following is the ion most likely to form when an O atom forms an ion? O 4+ O 2- O 6+ O 4- None of the above. 0.23 points QUESTION 20 1. Pure benzene has a density of 0.874 g/mL at 25C. What would be the mass of 7.60 mL of benzene at 25C? 7.60 g 6.64 g 9.32 g 8.70 g 11.4 g 0.23 points QUESTION 21 1. The chemical symbol for Tellurium is?
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  • Fall '19
  • Atom, Chemical element, Lecturer, NAo

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