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Stoichiometry Unit Review

Stoichiometry Unit Review. How many grams are equal to 1.50 moles of krypton?. .0179 41.9 83.8 126 9.03 x 10 23. 4. How many moles of cobalt are equal to 4.7 x 10 23 atoms of cobalt?. .080 .78 1.3 46 2.8 x 10 25. 0. How many moles of zirconium are equal to 270 grams of zirconium?.

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Stoichiometry Unit Review

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  1. Stoichiometry Unit Review

  2. How many grams are equal to 1.50 moles of krypton? • .0179 • 41.9 • 83.8 • 126 • 9.03 x 1023 4

  3. How many moles of cobalt are equal to 4.7 x 1023 atoms of cobalt? • .080 • .78 • 1.3 • 46 • 2.8 x 1025 0

  4. How many moles of zirconium are equal to 270 grams of zirconium? • 2.96 • 4.49 • 91.2 • 24,629 • 1.78 x 1024 0

  5. 243.52 grams of antimony is equal to _______ mole(s) of antimony or _______ atom(s) of antimony. • 1; 6.02 x 1023 • 2; 6.02 x 1023 • 2; 1.20 x 1024 • .5; 1.20 x 1024 • 2; 2 0

  6. What is the molar mass of sulfuric acid, H2SO4? • 25 • 49 • 67 • 98 • 194 13

  7. 0 Sodium sulfide and cadmium(II) nitrate undergo a double replacement reaction. What is the mass of cadmium sulfide that can be produced from 5.00 g of sodium sulfide? Na2S + Cd(NO3)2 2 NaNO3 + CdS • 0.34 g • 0.64 g • 4.69 g • 9.38 g • 18.8 g

  8. 0 Hydrogen and nitrogen gases can be combined to form ammonia gas, NH3. How many moles of N2 are required to form 27.0 g of ammonia? 3 H2 + N2 2 NH3 • 0.79 mol • 1.59 mol • 3.17 mol • 44.4 mol • 88.8 mol

  9. How many grams of the excess reactant will remain when 10.0 g of silicon and 100 g of oxygen react?Si + O2 → SiO2 • 0.0 g • 21.5 g • 64.8 g • 88.4 g • 166 g 0

  10. What is the percent yield if 35 grams of SO3 is produced from 50 grams of SO2?2SO2 + O2 → 2SO3 • 15% • 30% • 56% • 80% • 94% 30

  11. Determine the percent yield of hydrogen if 12.5 grams of hydrogen is collected from the reaction of 500 g of zinc with 500 g of HCl.Zn(s) + 2HCl(aq) ↔ H2(g) + ZnCl2(aq) • 14% • 46% • 77% • 91% • 110% 30

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