Limiting Reagent
NH3 + O2 --> NO + H2O. In an experiment, 3.25 g of NH3 is allowed to react with 3.50 g of O2. What is the limiting reagent?
O2
A scientist began this reaction with 20 grams of lithium hydroxide and 80 grams of KCl. What is the theoretical yield of lithium chloride (grams)?
35 g of LiCl
What is the molarity of 0.444 mol of CoCl2 in 0.654 L of solution?
0.679 M
What is the empirical formula of a compound containing 60.0% sulfur and 40.0% oxygen by mass?
SO3
C4H9OH + NaBr + H2SO4 --> C4H9Br + NaHSO4 + H2O If 15.0 g of C4H9OH react with 22.4 g of NaBr and 32.7 g of H2SO4 to yield 17.1 g of C4H9Br, what is the percent yield of this reaction?
61.6%
NH3 + O2 --> NO + H2O. In an experiment, 3.25 g of NH3 is allowed to react with 3.50 g of O2. How many grams are formed?
2.63 g of NO
2NaI +MnO2+H2SO4 --> Na2SO4 + MnSO4 + H2O +I2
What is the percent yield of I2 if the actual grams produced is 39.78 grams of I2 from 62.55 grams of NaI and excess of all the other reactants?
54% (Theoretical yield= 53 g)
A 0.250 L sample of seawater contains 77.4 g of NaCl. What is the concentration of NaCl in the saltwater?
5.30 M (5.2977 M)
Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. The molar mass for chrysotile is 520.8 g/mol. What is the molecular formula?
Mg6Si4H6O16 (empirical is Mg3Si2H3O8)
A scientist began this reaction with 20 grams of lithium hydroxide and an unlimited amount of KCl. What is the theoretical yield of lithium chloride (grams)?
LiOH + KCl --> LiCl + KOH
17%
Mg(OH)2 +HCl --> MgCl2 + H2O
How many grams of MgCl2 will be produced from 12.0 g of Mg(OH)2 and 42.0g of HCl?
19.6 grams of MgCl2
If the typical yield is 86.78%, how much SO2 should be expected if 4897 grams of ZnS are used?
2803 grams (ZnS+O2 --> ZnO +SO2) Theoretical Yield: 3231
An aqueous 0.300 M glucose (MW: 180.16 g/mol) solution is prepared with 0.150 L. What is the mass of glucose in grams needed for the solution?
8.11 g (8.1072 g)
What is the empirical formula of a compound containing 47.37% carbon, 10.59% hydrogen, and 42.04% oxygen?
C3H8O2
Nitrogen and hydrogen at high temperatures are converted to ammonia using the following reaction known as the Haber Process.
3H2 + N2 --> 2NH3
When 400 grams of H2 are added to an excess amount of N2, 104 grams of NH3 are formed. What is the percent yield?
4.5%
Na +Cl2 --> NaCl
How many grams of NaCl will be produced from 18.0 g of Na and 23.0 g of Cl2?
37.9 g of NaCl
If 4.95 g of ethylene (C2H4) is combusted with 3.25 g of oxygen. How much CO2 is formed?
2.98 g CO2
Nitric acid (HNO3) is a powerful and corrosive acid. When ordered from a chemical supply company, its molarity is 16 M. How much of the stock solution of nitric acid needs to be used to make 8.00 L of a 0.50 M solution?
250 mL
An unknown compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen with a molecular mass of 60.0 g/mol. What is the molecular formula of the unknown compound?
C2H4O2
Given the following reaction to produce Iodine gas: 2NaI + MnO2 +H2SO4 --> Na2SO4 + MnSO4 + H2O + I2
What is the percent yield of I2 if the actual grams produced is 39.78 grams of I2 from 62.55 grams of NaI?
75%
C3H8 + O2 --> CO2 + H2O
How many grams of CO2 will be produced from 39.0 g of C3H8 and 11.0 g of O2?
9.07 g of CO2
If 93.8 grams of PCl5 were reacted with 20.3 grams of H2O, how many grams of H3PO4 would be produced?
PCl5+4H2O-->H3PO4+5HCl
27.63 g of H3PO4
What volume of 5 M NaOH is needed to create a 100 mL solution of 1 M NaOH?
20 mL of 5 M NaOH
A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.
C15H15N3
The reaction, N2 + 3F2 --> 2NF3, yields 21.6 g NF3 when 5.00 g N2 reacts with excess fluorine. What is the percent yield?
85.4%