WorksheetsStoichiometry with mass/ molarity/ molar volume
Total questions: 8
Worksheet time: 22mins
Calculate the number of moles of O2 required to react with phosphorus to produce 2.82 g of P4O6. (Molar mass P4O6 = 219.9 g/mol)
4 P + 3 O2 → P4O6
0.0128 mol
0.088 mol
0.0385 mol
0.0256 mol
0.077 mol
A 5.95-g sample of AgNO3 is reacted with excess BaCl2 according to the equation
2AgNO3(aq) + BaCl2(aq) → 2AgCl(s) + Ba(NO3)2(aq)
to give 4.48 g of AgCl. What is the percent yield of AgCl?
59.5%
44.6%
89.2%
75.3%
100%
Nitric oxide, NO, is made from the oxidation of NH3 as follows: 4NH3 + 5O2 → 4NO + 6H2O
What volume of oxygen gas is needed to react with 9.6 grams of NH3 at STP>
9.10
10.1 L
0.45 L
15.8 L
49.6 L
What is the molarity of an NaI solution that contains 5.7 g of NaI in 33.0 mL of solution?
1.1 M
0.038 M
0.0057 M
0.00022 M
0.17 M
What minimum mass of cobalt (II) nitrate must be added to 60.0 mL of a 0.0890 M phosphate solution in order to completely precipitate all of the phosphate as solid cobalt (II) phosphate?
2PO43–(aq) + 3Co(NO3)2(aq) → Co3(PO4)2(s) + 6NO3–(aq)
0.976 g
2.93 g
0.651 g
0.325 g
1.40 g
The reaction of HCl with NaOH is represented by the equation
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
What volume of 0.668 M HCl is required to titrate 27.2 mL of 0.539 M NaOH?
9.79 ml
1.49 ml
21.9 ml
27.2 ml
33.7 ml
Soda ash (Na2CO3) is titrated with 15.66 mL of 0.1082 M HCl, what volume in mL of CO2 is to be formed at STP?
Na2CO3(aq) + 2 HCl(aq) → 2 NaCl(aq) + H2O() + CO2(g)
0.0189 ml
18.9 ml
3.18 ml
1.62 ml
37.1 ml
Sulfur dioxide will react with water to form sulfurous acid (see balanced equation below).
SO2(g) + H2O(l) → H2SO3(l)
What volume of sulfur dioxide is needed to prepare 2.5 L of 0.50 M H2SO3(l)?
28 L
14 L
22.4 L
8.96 L
11.2 L
