Stoichiometry IShow all work, units, substances, sigfigs and circle answers. ______
Li3N+3H2ONH3+3LiOH
1)2.5mol Li3Nmol LiOH?7.5
2)2.5mol Li3Nmol NH3?2.5
3)5.1mol H2Omol NH3?1.7
4)5.1mol H2Omol LiOH?5.1
5)9.99mol LiOHmol Li3N?3.33
6)0.1212mol NH3mol H2O?0.3636
2C4H10+13O28CO2+10H2O
7)0.78mol C4H10 mol CO2? 3.1
8)5.92mol C4H10 mol H2O?29.6
9)4.87mol CO2 mol C4H10?1.22
10)7.45mol CO2 mol O2?12.1
11)1.56mol H2O mol O2? 2.03
12)45.96molH2Omol C4H10?9.192
Stoichiometry II Show all work, units, substances, sigfigs and circle answers.
MgO + 2HCl MgCl2 + H2O
13)How many grams of H2O can be made from 3.28mol HCl? 29.6
14)How many grams of MgO are required to make 9.4molMgCl2? 380
15)How many mol HCl are required to make 34.95gH2O? 3.879
2Cu2S + 3O2 2Cu2O + 2SO2
16)How many mol Cu2S are needed to make 245.39g SO2? 3.830
17)How many grams SO2 are made from 23mol O2? 980
18)How many mol O2 are needed to make 26.4g Cu2O? 0.277
Write + balance: aluminum hydroxide + magnesium magnesium hydroxide + aluminum
______+ __ ___ ______+ __ ___
19)How many mol Al can be made from 395.12g Al(OH)3? 5.065
20)How many mol Mg are required to make 34.20g Mg(OH)2? 0.5863
21)How many grams Mg(OH)2 are produced when 4.92mol Al(OH)3 rxts w/ Mg?430.
SiCl4 + 2H2O SiO2 + 4HCl
22)How many grams SiO2 are made when 8.3mol SiCl4 rxts w/H2O?5.0x102
23)How many grams H2O are needed to make 5.3mol HCl?48
24)How many mol HCl can be made from 94.2gSiCl4?2.22
Stoichiometry IIIShow all work, units, substances, sigfigs and circle answers.
2Al + 3H2SO4 Al2(SO4)3 + 3H2
25)Given 10.0g of aluminum, how many grams of hydrogen gas will be produced?1.12
26)Given 10.0g of aluminum, how many grams of aluminum sulfate will be produced?63.4
27)Given 5.0 g of aluminum, how many grams of hydrogen gas will be produced?0.56
28)Given 5.0 g of aluminum, how many grams of aluminum sulfate will be produced?32
3H2 + N2 2NH3
29)Given 3.0 g of nitrogen gas, how many grams of ammonia (NH3) will be produced?3.6
30)Given 6.0 g of nitrogen gas, how many grams of ammonia (NH3) will be produced?7.3
31)Given 7.5 grams of hydrogen gas, how many grams of NH3 will be produced?42
32)Given 2.5 g of hydrogen gas, how many grams of NH3 will be produced?14
Predict + balance DD rxn for 33-36: magnesium chloride rxts w silver(I)nitate
______
33)Given 10.0 g of silver nitrate, how many grams of silver chloride will be produced? 8.44
34)Given 10.0 g of magnesium chloride, how many grams of silver chloride will be produced?30.1
35)Given 5.0 g of silver nitrate, how many grams of silver chloride will be produced?4.2
36)Given 5.00 g of magnesium chloride, how many grams of silver chloride will be produced?15.1
Stoichiometry Mixed ReviewShow all work, units, substances, sigfigs and circle answers.
2Na+2H2O→2NaOH+H2
37)0.36mol H2→ mol Na?0.72
38)45.29 gH2O→ mass of NaOH? 100.5
39)3.4mol NaOH→ mass of H2O?61
2LiBr+Cl2→2LiCl+Br2
40)2.3mol LiCl→grams Cl2?82
41)293.12g Br2→ mass LiBr?318.6
42)2.18mol Cl2→ mol LiCl?4.36
2Al+3H2SO4→Al2(SO4)3+3H2
43)9.34mol Al→ mol Al2(SO4)3?4.67
44)9.5mol Al→ mass H2?29
45)27.38g H2SO4→ mol H2?0.2791
C3H8+5O2→3CO2+4H2O
46)83.22gO2→ mass of H2O?37.49
47)6.03molC3H8→ molCO2? 18.1
48)2.3mol H2O→ grams O2?92
2Al2O3→4Al+3O2
49)1.17mol Al→ mol Al2O3?0.585
50)326.98g Al2O3→ mass of O2?153.9
51)2.64mol O2→ mass of Al2O3?179
3Fe+4H2O→4H2+Fe3O4
52)3.72g H2O→ mass of H2?0.417
53)3.93mol Fe→ mol Fe3O4?1.31
54)4.93mol H2→g Fe?207
Stoichiometry III(cont.)Show all work, units, substances, sigfigs and circle answers.
Cl2+2KBr2KCl+Br2
55)How many grams Br2 can be produced from 249.9g KBr? 167.8
56)How many grams KBr are needed to react w/ 82.56g Cl2? 277.1
3NaBr + H3PO4 3HBr + Na3PO4
57)How many grams Na3PO4 are made when 48.29g NaBr react? 25.65
58)How many grams HBr can be made from 93.05g H3PO4? 230.5
3NaOH + H3PO4 Na3PO4 + 3H2O
59)How many grams H2O can be made from 147.53g H3PO4? 81.38
60)How many grams NaOH are required to make 352.67g Na3PO4? 258.2
2NaClO3 2NaCl + 3O2
61)How many grams NaCl can be made from the reaction of 72.45g NaClO3? 39.78
62)How many g O2 can be made using 91.37g NaClO3? 41.20
63)Determine the mass of lithium hydroxide produced when 0.38g of lithium nitride rxts w/ water. Li3N+3H2O NH3 + 3LiOH 0.78
64)What mass of sodium chloride is produced when chlorine rxts w/ 0.29g of sodium iodide?
Cl2+2NaI 2NaCl + I2 0.11
65)Determine the mass of carbon dioxide produced when 0.85g of butane rxts w/ oxygen:
2C4H10+13O2 8CO2 + 10H2O 2.6
66)Determine the mass of antimony produced when 0.46g of antimony (III) oxide rxts w/ carbon:
Sb2O3 +3C 2Sb + 3CO0.38
67)What mass of hydrogen peroxide, H2O2, must decompose to produce 0.77g water? 1.5 2H2O22H20 +O2
68)What mass carbon monoxide rxtsw/air to yield 0.69g carbon dioxide?0.44 2CO+O22CO2
69)What mass sodium nitrate is produced when 0.73g nickel(II)nitrate rxts w/sodium hydroxide: 0.68Ni(NO3)2+2NaOHNi(OH)2+2NaNO3
70)Determine mass of the calcium hydroxide produced when calcium carbide rxts w/ 0.64 g water: 1.3CaC2+2H2OCa(OH)2+C2H2
71)How many grams ozone, O3 decompose to produce 0.87g of oxygen?0.872O33O2
72)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? 2.1gO3
Limiting Reactants/Percent YieldName______
Show all work, unit + substance/every number, sigfigs and circle answers.
1)If 41.6g N2O4 rxts w/ 20.8gN2H4, the products are nitrogen and water. What is the limiting reactant? How much N2 can be made? How much of the excess reactant remains? What is the percent yield if 26.3g are produced?N2O4+2N2H43N2+4H2O 27.3, 11.7, 96.3
2)If 16.8g CO is mixed under high pressure w/ 1.78gH2, making methanol, CH3OH. What is the limiting reactant? How much CH3OH can be made? How much of the excess reactant remains? What is the percent yield if 13.1g are produced? CO+2H2CH3OH14.1,4.5,92.9
3)58.7gsodium iodiderxtsw/29.4g chlorine producing21.9 g sodium chloride and iodine.Write balanced SD reaction. What is LR, how many grams NaCl can be produced?How much excess reactant remains? What is % yield? NaI,22.9,15.5,95.6
4)If 3.74gNa rxts w/ 26gO2 making sodium peroxide, Na2O2, what is the limiting reactant? How much Na2O2 can be made? How much of the excess reactant remains? What is the percent yield if 5.34 g are produced? 2Na+O2Na2O2 6.34, 23, 84.2
5)How many grams C2H2 can be made when 43.25g CaC2 rxts w/ 33.71g H2O? How much C2H2 can be made? How much excess reactant remains? What is %yield if 16.57 g are produced?CaC2+2H2OCa(OH)2+C2H2 17.57,9.39, 94.31
6)C12H22O11+12O212CO2+11H2O 10.0 g sucrose, C12H22O11, rxts w/ 10.0 g O2producing 5.00gH2O (a) What is the limiting reactant? (b) How much water can be made? (c) What mass of excess reactant remains? (d)What is the percent yield?5.16, 1.1, 96.9
7)2NBr3+3NaOHN2+3NaBr+3HOBr (a+b)Determine limiting reactant and calculate mass NaBr formed when 50.12g NBr3 and 57.00g NaOH react. (c)What mass of the excess reactant remains? (d)What is % yield if actual yield is 30.0g NaBr? 30.49, 45.15, 98.4
8)34.0g aluminum rxts w 39.0g chlorine gas to form 40.0g aluminum chloride.Write balanced synthesis reaction. What is the limiting reactant? How many grams of AlCl3 can be produced? How much excess reactant remains? What is % yield?Cl2,48.9, 24.1, 81.8
9)316.0g aluminum sulfide rxts w 493.0g water. Al2S3+6H2O2Al(OH)3+3H2S (a) What is the limiting reactant? (b) How much hydrosulfuric acid can be made? (c)What mass of excess reactant remains? (d)What is % yield if actual yield is 175g H2S?215.2, 265.5, 81.3
10)CaCO3+2HClCaCl2+CO2+H2O 6.088g Calcium carbonatereacted w/ 2.852g HCl. (a) What is the limiting reactant? (b) How much calcium chloride can be made? (c) mass excess reactant remains? (d)What is % yield if actual yield is 3.25g CaCl2? 4.341, 2.173, 74.9
11)4.00g hydrogenrxts w 3.21g nitrogen toform1.04g NH3:Write balanced reaction.Limiting reactant?Theoretical yield? Percent yield? Mass excess rxt left?N2,3.90,26.7,3.31
12)302.38g Na rxts w 419.02g Fe2O3toproduce 228.9g Fe.Limiting reactant?Theoretical yield?Percent yield?Mass excess rxt left?6Na+Fe2O33Na2O+2Fe244.9,93.47,68.9
13)76.93gbutane, C4H10, rxts w 38.06g oxygen to make 29.64g carbon dioxide + water.Balanced combustion rxn? Limiting rxt?Theoretical yield?Percent yield?Mass excess rxt left over?O2,32.21,92.02,66.29
14)Percentage yield=83.2%. What mass PCl5 is expected (actual yield)if 73.7g PCl3rxts w excess Cl2? PCl3+Cl2→PCl593.2
Stoichiometry w/ Volume Show all work, units, substances, sigfigs and circle answers.
For 1-3)2H2O2(l)2H2O(l)+O2(g), D(O2)=1.428g/L,D(H2O2)=1.407g/mL, 1000mL=1L
1)How many liters oxygen can be made from 342g hydrogen peroxide? 113
2)How many liters oxygen can be made from 55mLhydrogen peroxide? 25
3)How many litershydrogen peroxide are needed to make 4.25L oxygen? 0.00917
For 4-6)2KClO3(s)2KCl(s)+3O2(g); D(O2)=1.428g/L,1000mL=1L
4)How many liters oxygencan be made from 5.00x10-2mol potassium chlorate?1.68
5)How many grams potassium chlorate must react to form 42.0mL oxygen?0.153
6)How many mL of oxygen will form from 55.2g potassium chlorate? 1.51x104
7-10: C5H12(l)C5H8(l)+2H2(g);D(C5H8)=0.681g/mL;D(H2)=0.0899g/L;D(C5H12)=0.620g/mL
7)How many mL C5H8can be made from 366mLC5H12?315
8)How many liters H2 can form when 4.53x103mLC5H8form?2.03x103
9)How many milliliters C5H12are needed to make 97.3 mL C5H8?113
10)How many milliliters H2(1000mL=1L) can be made from 1.98x103mL C5H12?7.64x105
11)Write balanced SDreaction: Magnesium burns in oxygen to produce magnesium oxide.
- What mass magnesium will burn in the presence of 189 mL oxygen D=1.428g/L?0.410
Molar Volume: For any gas @STP, use 1 mole = 22.41L
12)Find mass of sugar, C6H12O6, required to produce 1.82L carbon dioxide gas @STP.7.32C6H12O62C2H6O+2CO2
13)How many liters of oxygen are neededto rxt w 425g sulfur to produce sulfur dioxide@STP? 297S+O2SO2
14)Find mass of benzene (C6H6) required to react w oxygen to produce 2.66L carbon dioxide gas and water @STP.1.55 2C6H6+15O26H20+12CO2
Stoichiometry Test Review: Show all work, unit + sub on every #, sigfigs, circle answers.
1)For 2-5)Write balanced equationSodium azide, NaN3,decomposes into sodium + nitrogen
2)How many moles Na can be made from 6.09mol NaN3? 6.09
3)How many grams N2 can be made from 10.3mol NaN3?433
4)How many moles NaN3 are needed to make 274.1g Na? 11.92
5)How many grams NaN3 are needed to make 53.67g N2? 83.03
6)Write balanced SD reaction: 38.92gsodium rxts w/ 176.30g iron(III)oxide to produce51.46g sodium oxide + iron. What is LR? How much Na2O can be made? How much excess reactant remains? What is % yield?52.46, 131.24, 98.09
For 7+8)2Na+2H2O2NaOH+H2
7)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?57.38,49.01,51.06
8)If 38.4gNa rxts w 37.2gH2O and has a 78.0%yield, what is the actual yield of NaOH?52.1
For 9+10)C5H12+8O25CO2+6H2O; D(CO2)=1.997g/L; D(O2)=1.429g/L
9)Pentane, C5H12, burns in oxygen to produce carbon dioxide + water. If 85.5g pentane completely burns, what volume of carbon dioxideis produced?131
10)If 85.5L oxygencompletely burns, what volume of carbon dioxide is produced? 53.1