According to the following balanced reaction, how many moles of NO are formed fr
ID: 891095 • Letter: A
Question
According to the following balanced reaction, how many moles of NO are formed from 8.44 moles of NO2 if there is plenty of water present?
25.32 moles NO
12.66 moles NO
8.44 moles NO
5.63 moles NO
2.82 moles NO
2. According to the following balanced reaction, how many moles of HNO3 are formed from 8.44 moles of NO2 if there is plenty of water present?
25.32 moles NO
12.66 moles NO
8.44 moles NO
5.63 moles NO
2.82 moles NO
3. Consider the following reaction. How many moles of oxygen are required to produce 10.0 moles of water? Assume that there is excess C3H7SH present.
6.67 moles O2
15.0 moles O2
10.0 moles O2
40.0 moles O2
2.50 moles O2
4. According to the following balanced reaction, how many moles of KO are required to exactly react with 5.44 moles of H2O?
5.44 moles H2O
10.9 moles H2O
21.8 moles H2O
2.72 moles H2O
1.36 moles H2O
5. According to the following balanced reaction, how many moles of KOH are required to exactly react with 5.44 moles of H2O?
5.44 moles H2O
10.9 moles H2O
21.8 moles H2O
2.72 moles H2O
1.36 moles H2O
6. How many grams of oxygen are formed when 6.21 moles of KOH are formed?
6.21 g O2
24.8 g O2
49.7 g O2
199 g O2
99.4 g O2
7. How many molecules of HCl are formed when 80.0 g of water reacts according to the following balanced reaction? Assume excess ICl3.
4.46 × 1024 molecules HCl
2.68 × 1024 molecules HCl
8.04 × 1024 molecules HCl
5.36 × 1024 molecules HCl
4.46 × 1025 molecules HCl
8.Which of the following is NOT a strong electrolyte?
NaOH
CaCl2
CaCO3
NaC2H3O2
K2SO4
9. Which of the following is considered a STRONG electrolyte?
NH4NO3
C12H22O11
PbBr2
HC2H3O2
CH3SH
10. Which one of the following compounds is insoluble in water?
Ca Cl2
NaNO3
Pb Cl2
K2CO3
11. Which one of the following compounds is soluble in water?
Cu3(PO4)2
CoS
Pb(NO3)2
ZnCO3
12. How many of the following compounds are soluble in water?
0
1
2
3
4
13. Which of the following compounds is soluble in water?
CaS
MgCO3
PbBr2
PbSO4
None of these compounds is soluble in water.
14. Which of the following compounds is insoluble in water?
Hg2Cl2
MgSO4
(NH4)2CO3
SrS
All of these compounds are soluble in water.
15. The mixing of which pair of reactants will result in a precipitation reaction?
CsI(aq) + NaOH(aq)
HCl(aq) + Ca(OH)2(aq)
K2SO4(aq) + Hg2(NO3)2(aq)
NaNO3(aq) + NH4Cl(aq)
16. Which of the following is a precipitation reaction?
Zn(s) + 2 AgNO3(aq) 2 Ag(s) + Zn(NO3)2(aq)
NaCl(aq) + LiI(aq) NaI(aq) + LiCl(aq)
2 KI(aq) + Hg2(NO3)2(aq) Hg2I2(s) + 2 KNO3(aq)
HI(aq) + NaOH(aq) NaI(aq) + H2O(l)
None of these are precipitation reactions.
17. Which of the following pairs of aqueous solutions will form a precipitate when mixed?
K2CO3 + NaBr
Na2 SO4 + KOH
CaS + Na2SO4
None of these solution pairs will produce a precipitate.
All of these solution pairs will produce a precipitate.
18. Which of the following pairs of aqueous solutions will form a precipitate when mixed?
NH4NO3 + Li2CO3
Hg2(NO3)2 + LiCl
NaCl + Li3PO4
AgC2H3O2 + Cu(NO3)2
None of these solution pairs will produce a precipitate.
19. Silver ions can be precipitated from aqueous solutions by the addition of aqueous chloride:
Silver chloride is virtually insoluble in water so that the reaction appears to go to completion. How many grams of solid NaCl must be added to 25.0 mL of 0.366 M AgNO3 solution to completely precipitate the silver?
9.15 × 10-3 g
1.57 × 10-4 g
0.535 g
0.157 g
6.39 × 103 g
20.Identify the polyprotic acid.
H2SO4
HCl
LiCl
LiOH
Ca(OH)2
21.In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution. What is the concentration of the H2SO4 solution?
0.194 M
0.387 M
0.775 M
1.29 M
22. A solution is prepared by mixing 50.0 mL of 0.100 M HCl and 10.0 mL of 0.200 M NaCl. What is the molarity of chloride ion in this solution?
0.183
8.57
3.50
0.0500
0.117
23. A solution is prepared by adding 1.60 g of solid NaCl to 50.0 mL of 0.100 M CaCl2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
0.747
0.647
0.132
0.232
0.547
24. What is the molarity of a NaOH solution if 28.2 mL of a 0.355 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
0.801
0.315
0.629
125
0.400
25. What is the oxidation number of the sulfur atom in K2SO4 ?
-2
+2
+4
+6
26.Determine the oxidation state of S in Na2SO4.
-4
+2
+4
+6
-2
27. Identify the oxidation state of Ba in Ba(s).
+1
+2
0
-1
-2
28. Balance the chemical equation given below, and determine the number of grams of MgO are needed to produce 10.0 g of Fe2O3.
0.312 g
0.841 g
2.52 g
7.57 g
29. If the density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation?
6.19 mL
9.95 mL
19.9 mL
39.8 mL
30. If the percent yield for the following reaction is 75.0%, and 45.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq) are produced?
30.8 g
41.1 g
54.8 g
69.3 g
31. Determine the theoretical yield of H2S (in moles) if 64 mol Al2S3 and 64 mol H2O are reacted according to the following balanced reaction. A possibly useful molar mass is Al2S3 = 150.17 g/mol.
192 mol H2S
64 mol H2S
128 mol H2S
96 mol H2S
32 mol H2S
32. Which substance is the limiting reactant when 2.0 g of sulfur reacts with 3.0 g of oxygen and 4.0 g of sodium hydroxide according to the following chemical equation
S(s)
O2(g)
NaOH(aq)
None of these substances is the limiting reactant.
Explanation / Answer
1.) when 8.44 moles of NO2 presents it gives 8.44 moles of NO in presence of water.
as no of NO mole = no of NO2 moles
2) moles of HNO3 are formed from 8.44 moles of NO2 if there is same as above 8.44 moles.
3) this is first order reaction where the no of moles of oxygen are consumed = no of molesof water roduce.
Therefore 10.0 moles of water produced = 10 moles of Oxygen consumed.
4) According to the balanced reaction, 5.44 moles of KOH will required to react with 5.44 moles of H2O
5) According to the balanced reaction, 5.44 moles of KOH will required to react with 5.44 moles of H2O
6) 199 grams of oxygen are formed when 6.21 moles of KOH are formed.
7) 4.46 × 1025 molecules of HCl many are formed when 80.0 g of water reacts with excess ICl3.
8) CaCo3 is NOT a strong electrolyte
9) NH4NO3 is considered a STRONG electrolyte
10) PbCl2 compounds is insoluble in water
11) Pb(NO3)2 compounds is soluble in water
12) 1 of the following compounds are soluble in water.
13) PbSO4 the following compounds is soluble in water
14) SrS of the following compounds is insoluble in water?
Hg2Cl2
MgSO4
(NH4)2CO3
SrS
15) K2SO4(aq) + Hg2(NO3)2(aq) mixing of this pair of reactants will result in a precipitation reaction
16) None of these are precipitation reactions
Zn(s) + 2 AgNO3(aq) 2 Ag(s) + Zn(NO3)2(aq)
NaCl(aq) + LiI(aq) NaI(aq) + LiCl(aq)
2 KI(aq) + Hg2(NO3)2(aq) Hg2I2(s) + 2 KNO3(aq)
HI(aq) + NaOH(aq) NaI(aq) + H2O(l)
17) None of these solution pairs will produce a precipitate.
K2CO3 + NaBr
Na2 SO4 + KOH
CaS + Na2SO4
18) None of these solution pairs will produce a precipitate.
NH4NO3 + Li2CO3
Hg2(NO3)2 + LiCl
NaCl + Li3PO4
AgC2H3O2 + Cu(NO3)2
19)
20) H2SO4 is the polyprotic acid.
21) In an acid-base neutralization reaction 38.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution. 0.194M concentration of the H2SO4 solution
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