Show All Work on a Separate Sheet of Paper, Unit + Sub on Every #, Sigfigs, and Circle Answers

Show All Work on a Separate Sheet of Paper, Unit + Sub on Every #, Sigfigs, and Circle Answers

Stoichiometry

Show all work on a separate sheet of paper, unit + sub on every #, sigfigs, and circle answers.

Li3N + 3H2O  NH3 + 3LiOH

  1. How many moles LiOH are produced when 2.5mol Li3N reacts with water in the following equation?7.5
  2. How many moles NH3 are produced when 2.5mol Li3N reacts with water in the following equation?2.5
  3. How many moles NH3 are produced when 5.1mol H2O reacts with Li3N in the following equation?1.7
  4. How many moles LiOH are produced when 5.1mol H2O reacts with Li3N in the following equation?5.1
  5. How many moles Li3N are produced when 9.99mol LiOH reacts with H2O in the following equation? 3.33
  6. How many moles H2O are produced when 0.1212mol NH3 reacts with H2O in the following equation? 0.3636

2C4H10 + 13O2 8CO2 + 10H2O

  1. How many moles CO2 are produced when .78mol C4H10 reacts with O2 in the following equation?3.1
  2. How many moles of H2O are produced when 5.92mol C4H10 reacts with O2 in the following equation?29.6
  3. How many moles of C4H10 are needed to produce 4.87mol CO2 in the following equation?1.22
  4. How many moles of O2 are needed to produce 7.45mol CO2 in the following equation?12.1
  5. How many moles of O2 are needed to produce 1.56mol H2O in the following equation?2.03
  6. How many moles of C4H10 are needed to produce 45.96mol H2O in the following equation?9.192
  7. Forthisreaction: ____Al____O2→ ____Al2O3
  8. HowmanymolesofAl2O3willbeformedfrom17molesofAlreacting?8.5
  9. HowmanymolesofO2areneededtoreactwith23.8molesofAl?17.9
  10. Forthisreaction: ____NH3+____O2→____NO+____H2O
  11. HowmanymolesofO2areneededtoreactwith3.24molesofNH3?4.05
  12. HowmanymolesofH2Oareproducedfrom12.8molesofO2?15.4
  13. Forthisreaction: ____Fe3O4+____CO→ ____Fe+____CO2
  14. HowmanymolesofCO2areproducefrom2.87molesofFe3O4?11.5
  15. HowmanymolesofCO areneededtoreactwith8.25molesofFe3O4?33.0
  16. Forthisreaction: ____PbO+ ____O2→____Pb3O4
  17. HowmanymolesofPb3O4areproducedfrom1.25molesofO2?2.50
  18. HowmanymolesofO2mustreactwith8.75molesofPb3O4?4.38

MgO + 2HCl  MgCl2 + H2O

  1. How many grams of H2O can be made from 3.28mol HCl according to the above equation? 29.6
  2. How many grams of MgO are required to make 9.4mol MgCl2 according to the above equation? 380
  3. How many mol HCl are required to make 34.95g H2O according to the equation above? 3.879

2Cu2S + 3O2 2Cu2O + 2SO2

  1. How many mol Cu2S are needed to make 245.39g SO2 according to the equation above? 3.830
  2. How many grams SO2 are made from 23mol O2 according to the equation above? 980
  3. How many mol O2 are needed to make 26.4g Cu2O according to the equation above? 0.277

2Al(OH)3 + 3Mg 3Mg(OH)2 + 2Al

  1. How many mol Al can be made from 395.12g Al(OH)3 according to the equation above? 5.065
  2. How many mol Mg are required to make 34.20g Mg(OH)2 according to the above equation? 0.5863
  3. How many grams Mg(OH)2 are produced when 4.92mol Al(OH)3 reacts with magnesium according to the equation above? 430.

SiCl4 + 2H2O  SiO2 + 4HCl

  1. How many grams SiO2 are made when 8.3mol SiCl4 reacts with water according to the equation above? 5.0 x 102
  2. How many grams H2O are needed to make 5.3mol HCl according to the equation above? 48
  3. How many mol HCl can be made from 94.2gSiCl4 according to the equation above? 2.22

4P + 5O2 P4O10

  1. How many grams of P is needed to make 38g P4O10? 17
  2. How many grams of O2 is needed to make 32.59g P4O10? 18.37

Al2(SO4)3 + 3Ca(OH)2 2Al(OH)3 + 3CaSO4

  1. If 46.00g Ca(OH)2 reacts completely according to the above reaction, how many g CaSO4 will be made? 84.52
  2. If 67.6g Al2(SO4)3 are used in the above reaction, how many g Al(OH)3 will be formed? 30.8

2Al + 6HCl  2AlCl3 + 3H2

  1. How many grams H2 can be made from 45g HCl in the above reaction? 1.2
  2. How many grams AlCl3 can be made from 45.000g HCl in the above reaction? 54.85

2Bi + 3F2 2BiF3

  1. How many grams BiF3 can be made from 22.9g Bi? 29.1
  2. How many grams BiF3 can be made from 22.4g F2? 105

2Al + 3H2SO4 Al2(SO4)3 + 3H2

  1. Given 10.0g of aluminum, how many grams of hydrogen gas will be produced?1.12
  2. Given 10.0g of aluminum, how many grams of aluminum sulfate will be produced?63.4
  3. Given 5.0 g of aluminum, how many grams of hydrogen gas will be produced?0.56
  4. Given 5.0 g of aluminum, how many grams of aluminum sulfate will be produced?32

3H2 + N2 2NH3

  1. Given 3.0 g of nitrogen gas, how many grams of ammonia (NH3) will be produced?3.6
  2. Given 6.0 g of nitrogen gas, how many grams of ammonia (NH3) will be produced?7.3
  3. Given 7.5 grams of hydrogen gas, how many grams of NH3 will be produced?42
  4. Given 2.5 g of hydrogen gas, how many grams of NH3 will be produced?14

MgCl2 + 2AgNO3 Mg(NO3)2 + 2AgCl

  1. Given 10.0 g of silver nitrate, how many grams of silver chloride will be produced? 8.44
  2. Given 10.0 g of magnesium chloride, how many grams of silver chloride will be produced?30.1
  3. Given 5.0 g of silver nitrate, how many grams of silver chloride will be produced?4.2
  4. Given 5.00 g of magnesium chloride, how many grams of silver chloride will be produced?15.1

Cl2+2KBr2KCl+Br2

  1. How many grams Br2 can be produced from 249.9g KBr? 167.8
  2. How many grams KBr are needed to react w/ 82.56g Cl2? 277.1

3NaBr + H3PO4 3HBr + Na3PO4

  1. How many grams Na3PO4 are made when 48.29g NaBr react? 25.65
  2. How many grams HBr can be made from 93.05g H3PO4? 230.5

3NaOH + H3PO4 Na3PO4 + 3H2O

  1. How many grams H2O can be made from 147.53g H3PO4? 81.38
  2. How many grams NaOH are required to make 352.67g Na3PO4? 258.1

2NaClO3  2NaCl + 3O2

  1. How many grams NaCl can be made from the reaction of 72.45g NaClO3? 39.78
  2. How many g O2 can be made using 91.37g NaClO3? 41.20
  3. Determine the mass of lithium hydroxide produced when 0.38g of lithium nitride rxts w/ water. Li3N+3H2O  NH3 + 3LiOH 0.78
  4. What mass of sodium chloride is produced when chlorine rxts w/ 0.29g of sodium iodide?

Cl2+2NaI  2NaCl + I2 0.11

  1. Determine the mass of carbon dioxide produced when 0.85g of butane rxts w/ oxygen:

2C4H10+13O2 8CO2 + 10H2O 2.6

  1. Determine the mass of antimony produced when 0.46g of antimony (III) oxide rxts w/ carbon: Sb2O3 +3C  2Sb + 3CO 0.38
  2. What mass of hydrogen peroxide, H2O2, must decompose to produce 0.77g water? 1.5 2H2O22H2O +O2
  3. What mass carbon monoxide rxts w/ air to yield 0.69g carbon dioxide?0.44 2CO+O22CO2
  4. What mass sodium nitrate is produced when 0.73g nickel(II)nitrate rxts w/sodium hydroxide: 0.68 Ni(NO3)2+2NaOHNi(OH)2+2NaNO3
  5. Determine mass of the calcium hydroxide produced when calcium carbide rxts w/ 0.64 g water: 1.3 CaC2+2H2OCa(OH)2+C2H2
  6. How many grams ozone, O3 decompose to produce 0.87g of oxygen?0.87 2O33O2
  7. NO2(g)+O2(g)NO(g)+O3(g) What mass of ozone, O3, will form from 2.0gNO2 in a car's exhaust and excess oxygen? 2.1

2Na + 2H2O → 2NaOH + H2

  1. How many mol Na are needed to make 0.36mol H2? 0.72
  2. What mass of NaOH can be made from 45.29 gH2O? 100.5
  3. What mass of H2O is needed to make 3.4mol NaOH? 61

2LiBr + Cl2→ 2LiCl + Br2

  1. How many grams Cl2 are needed to make 2.3mol LiCl? 82
  2. What mass LiBr is needed to make 293.12g Br2? 318.6
  3. How many mol LiCl can be made from 2.18mol Cl2? 4.36

2Al + 3H2SO4→ Al2(SO4)3 + 3H2

  1. How many mol Al2(SO4)3 can be made from 9.34mol Al? 4.67
  2. What mass of H2 is made from 9.5mol Al? 29
  3. How many mol H2 can be made from 27.38g H2SO4? 0.2791

C3H8 + 5O2→ 3CO2 + 4H2O

  1. What mass of H2O can be made from 83.22g O2? 37.49
  2. How many mol CO2 can be made from 6.03mol C3H8? 18.1
  3. How many grams O2 are needed to make 2.3mol H2O? 92

2Al2O3→ 4Al + 3O2

  1. How many mol Al2O3 are needed to make 1.17mol Al? 0.585
  2. What mass of O2 can be made from 326.98g Al2O3? 153.9
  3. What mass of Al2O3 is needed to make 2.64mol O2? 179

3Fe + 4H2O → 4H2 + Fe3O4

  1. What mass of H2 can be made from 3.72g H2O? 0.417
  2. How many mol Fe3O4 can be made from 3.93mol Fe? 1.31
  3. How many grams Fe are needed to make 4.93mol H2? 207

N2O4 + 2N2H4 3N2 + 4H2O

  1. If 41.6g N2O4 reacts with 20.8g N2H4, the products will be nitrogen and water. (a)What is the limiting reactant? (b) How much N2 can be made? (c)How much of the excess reactant remains? (a) N2H4 (b)27.3 (c)11.8

CO + 2H2 CH3OH

  1. If 16.8g CO is mixed under high pressure with 1.78g H2, making methanol (CH3OH). (a)What is the limiting reactant? (b) How much CH3OH can be made? (c)How much of the excess reactant remains? (a) H2 (b)14.1 (c)4.5

2NaI + Cl2 2NaCl + I2

  1. If 58.7g NaI with 29.4g Cl2 gas and the products are sodium chloride (NaCl) and I2. (a) What is the limiting reactant? (b) How much NaCl is produced? (c)How much of the excess reactant remains? (a)NaI (b)22.9 (c)15.5

2Na + O2 Na2O2

  1. If 3.74g Na reacts with 26.0g O2 making Na2O, (a) what is the limiting reactant? (b) How much Na2O2 can be made? (c) How much of the excess reactant remains? (a)Na (b)6.34 (c)23.4

CaC2 + 2H2O  Ca(OH)2 + C2H2

  1. When 43.25g CaC2 reacts with 33.71g H2O, according to the following equation, (a) what is the limiting reactant? (b) How much C2H2 can be made? (c) How much of the excess reactant remains? (a) CaC2 (b)17.57 (c)9.39

C12H22O11+ 12O2→ 12CO2+ 11H2O

  1. There are 10.0 g of sucrose, C12H22O11, and 10.0 g of oxygen reacting. Find the limiting reactant, how much water can be made, and how much of the excess reactant remains. LR=O2, 5.16, 1.1

2NBr3+ 3NaOH → N2+ 3NaBr + 3HOBr

  1. Calculate the mass of NaBr formed when 50.12g NBr3 and 57.00g NaOH react? (hint: how much will the limiting reactant produce?) 30.49

2Al + 3Cl2→ 2AlCl3

  1. How many grams of aluminum chloride could be produced from 34.0 g of aluminum and 39.0 g of chlorine gas? (b)What is the limiting reactant? (c) How much of the excess reactant remains? (a) 48.89 (b) Cl2 (c)24.1

Al2S3+ 6H2O → 2Al(OH)3+ 3H2S

  1. Suppose 316.0 g aluminum sulfide reacts with 493.0 g of water. (a) What is the limiting reactant? (b)What mass of the excess reactant remains? (a)Al2S3(b) 265.5

CaCO3+ 2HCl → CaCl2+ CO2+ H2O

  1. 6.088 g CaCO3reacted with 2.852g HCl. (a) What is the limiting reactant? (b) How much calcium chloride can be made? (c) What mass of the excess reactant remains? (a)HCl (b)4.341 (c)2.173

Determine (a) limiting reactant, (b) theoretical yield, (c) percent yield, and (d) amount of excess remaining for each of the following situations in questions 71-73.

  1. N2 + 3H2→ 2NH3 When 4.00 g of H2 is added to 3.21g of N2, 1.04g of NH3 is produced. N2, 3.90, 26.7%, 3.31
  2. 6Na + Fe2O3→ 3Na2O + 2Fe When 302.38g Na reacts with 419.02g Fe2O3 and 228.9g Fe are produced. Na, 244.9, 93.47%,68.9
  3. 2C4H10 + 13O2→ 8 CO2 + 10H2O When 76.93g C4H10 reacts with 38.06g O2 to make 29.64g CO2. O2, 32.21, 92.02%, 66.29
  4. PCl3 + Cl2 → PCl5The percentage yield for the following reaction in 83.2%. What mass of PCl5 is expected from the reaction of 73.7g PCl3 with excess Cl2? 93.2

2H2O2(l) → 2H2O(l) + O2(g)

  1. How many liters of O2 can be made from 342g H2O2 if the density of O2 is 1.428 g/L? 113
  2. The density of H2O2 is 1.407 g/mL and the density of O2 is 1.428g/L. How many liters of O2 can be made from 55mL H2O2? 25
  3. Using the densities from question 96, how many liters of H2O2 are needed to make 4.25L O2? 0.00917

2KClO3(s) → 2KCl(s) + 3O2(g)DO2=1.428g/L.

  1. What volume of oxygen can be made from 5.00 x 10-2 mol KClO3? 1.68
  2. How many grams KClO3 must react to form 42.0mL O2? 0.153
  3. How many mL of O2 will form from 55.2g KClO3? 1.51 x 104

105-108:C5H12(l)C5H8(l)+2H2(g);D(C5H8)=0.681g/mL;D(H2)=0.0899g/L;D(C5H12)=0.620g/mL

  1. How many mL C5H8 can be made from 366mLC5H12?315
  2. How many liters H2 can form when 4.53x103mLC5H8 form?2.03x103
  3. How many milliliters C5H12 are needed to make 97.3 mL C5H8?113
  4. How many milliliters H2 (1000mL=1L) can be made from 1.98x103mL C5H12?7.64x105
  5. Write balanced synth reaction: Magnesium burns in oxygen to produce magnesium oxide.
  6. What mass magnesium will burn in the presence of 189 mL oxygen D=1.428g/L? 0.410

111-113: For any gas @STP, use 1 mole = 22.41L

  1. C6H12O62C2H6O+2CO2Find the mass of sugar, C6H12O6, required to produce 1.82L of carbon dioxide gas at the STP: 7.32
  2. S+O2 SO2How many liters of oxygen are necessary for the combustion of 425 g of sulfur, if rxn occurs at STP? 297
  3. 2C6H6 + 15O2 6H20 + 12CO2Find the mass of benzene (C6H6) required to produce 2.66 L of carbon dioxide gas at STP: 1.55

Stoichiometry Test Review: Show all work, unit + sub on every #, sigfigs, circle answers.

  1. For (114-118) Write balanced equation Sodium azide, NaN3,decomposes into sodium + nitrogen

  1. How many moles Na can be made from 6.09mol NaN3? 6.09
  2. How many grams N2 can be made from 10.3mol NaN3?433
  3. How many moles NaN3 are needed to make 274.1g Na? 11.92
  4. How many grams NaN3 are needed to make 53.67g N2? 83.03
  5. Write balanced SD reaction: 38.92g sodium rxts w/ 176.30g iron(III)oxide to produce 51.46g sodium oxide + iron. What is LR? How much Na2O can be made? How much excess reactant remains? What is % yield?Na, 52.46, 131.24, 98.09

For (120-121)2Na+2H2O2NaOH+H2

  1. 32.98g sodium + 74.86g water produce 29.30g sodium hydroxide. What is LR? How much sodium hydroxide can be made? How much excess reactant remains? What is % yield? Na,57.38,49.01,51.06
  2. If 38.4gNa rxts w 37.2gH2O and has a 78.0%yield, what is the actual yield of NaOH?52.1

For (122-123) C5H12+8O25CO2+6H2O; DCO2=1.997g/L; DO2=1.429g/L

  1. Pentane, C5H12, burns in oxygen to produce carbon dioxide + water. If 85.5g pentane completely burns, what volume of carbon dioxide is produced? 131
  2. If 85.5L oxygen completely burns, what volume of carbon dioxide is produced? 52.6

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