1. Convert the following a) 120 g mol of NaCl to g. b) 120 g of NaCl to g mol. c) 120 lb mol of NaCl to lb. d) 120 lh of NaCIn Ih mol.

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Chapter2: Matter And Energy
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Homework 1.pdf >
1. Convert the following:
a) 120 g mol ol NaCl to g.
b) 120 g of NaCI to g mol.
c) 120 lb mol of NaCl to lb.
d) 120 lh of NaCl to Ih mol
2. Convert 39.8 kg of NaCl per 100 kg of water to kg mol of NaCl per kg mol of water.
3. How many Ib mol of NaNO, are there in 100 lb?
4. The density of a material is 2 kg/m'. What is its specific volume?
5. An empty 10 gal tank weighs 4.5 Ib. What is the total weight of the tank plus the water when it is
filled with 5 gal of water?
6. If you add 50 g of sugar to 500 ml of water, how do you calculate the density of the sugar
solution?
7. For ethanol, a handbook gives: sp. gr. 60°F = 0.79389. What is the density of ethanol at 60 F?
8. The specific gravity of steel is 7.9. What is the volume in cubic feet of a steel ingot weighing
4000 Ib?
9.
The specific gravity of a solution is 0.80 at 70°F. How many cubic feet will he occupied hy 10X0
Ih of the solution at 70'F?
10. A solution in water contains I.704 kg of HNOkg H;0, and the solution has a specific gravity of
1.382 at 20°C, What is the mass of HNO: in kg per cubic meter of solution
20°C?
11. Forty gal/min of a hydrocarbon fuel having a specific gravity of 0.91 flows into a tank truck with
a load limit of 40,000 Ib of fuel. How kong will it take to fill the tank in the truck!
1
Chemical Enzincsring Dariment- Collzsef Enrincuring - University of Disala
12. Pure chlorine enters a process. By measurement it is found that 2.4 kg of chlorine pass into the
process every 3.1 minutes. Calculate the molar flow rate of the chlorine in kg mol/hr.
13. Commercial sulfuric acid is 98% H;SO, and 2% H;O. What is the mole ratio of H,SO, to H;0?
14. A compound contains 50% sulfur and 50% oxygen by mass. Is the empirical formula of the
compound (1) SO, (2) SO, (3) SO, or (4) SO.?
15. How many kg of activated carbon (a substance used in removing trace impurities) must be mixed
with 38 kg of sand so that the final mixture is 28% activated carbon?
16. A gas mixture contains 40 lb of O,, 25 lb of SO, and 30 lb of SO,, What is the composition of
the mixture in mole fractions?
17. Saccharin, an artificial sweetener that is 3000 times sweeter than sucrose, is composed of 45.90%
carbon, 2.73% hydrogen, 26.23% oxygen, 7.65% nitrogen, and 17.49% sulfur. Is the molecular
formula of saccharin (a) CHO,N,S. (b) CH,O;NS, (e) C,H,O;NS, and (d) C;H,O;NS?
18. A mixture of gases is analyzed and found to have the following composition: Co, 12.0%, CO
6.0%, CH, 27.3%, H, 9.9% and N, 44.8%. How much will 3 lb mol of this gas weigh?
19. A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composition:
n-C,H 50%, n-C,H12 30%, and n-C,H, 20%. For this mixture, calculate:
a) The weight fraction of each component.
b) The mole fraction of each component.
c) The mole percent of each component.
d) The average molecular weight of the mixture.
II
Transcribed Image Text:0:YV Homework 1.pdf > 1. Convert the following: a) 120 g mol ol NaCl to g. b) 120 g of NaCI to g mol. c) 120 lb mol of NaCl to lb. d) 120 lh of NaCl to Ih mol 2. Convert 39.8 kg of NaCl per 100 kg of water to kg mol of NaCl per kg mol of water. 3. How many Ib mol of NaNO, are there in 100 lb? 4. The density of a material is 2 kg/m'. What is its specific volume? 5. An empty 10 gal tank weighs 4.5 Ib. What is the total weight of the tank plus the water when it is filled with 5 gal of water? 6. If you add 50 g of sugar to 500 ml of water, how do you calculate the density of the sugar solution? 7. For ethanol, a handbook gives: sp. gr. 60°F = 0.79389. What is the density of ethanol at 60 F? 8. The specific gravity of steel is 7.9. What is the volume in cubic feet of a steel ingot weighing 4000 Ib? 9. The specific gravity of a solution is 0.80 at 70°F. How many cubic feet will he occupied hy 10X0 Ih of the solution at 70'F? 10. A solution in water contains I.704 kg of HNOkg H;0, and the solution has a specific gravity of 1.382 at 20°C, What is the mass of HNO: in kg per cubic meter of solution 20°C? 11. Forty gal/min of a hydrocarbon fuel having a specific gravity of 0.91 flows into a tank truck with a load limit of 40,000 Ib of fuel. How kong will it take to fill the tank in the truck! 1 Chemical Enzincsring Dariment- Collzsef Enrincuring - University of Disala 12. Pure chlorine enters a process. By measurement it is found that 2.4 kg of chlorine pass into the process every 3.1 minutes. Calculate the molar flow rate of the chlorine in kg mol/hr. 13. Commercial sulfuric acid is 98% H;SO, and 2% H;O. What is the mole ratio of H,SO, to H;0? 14. A compound contains 50% sulfur and 50% oxygen by mass. Is the empirical formula of the compound (1) SO, (2) SO, (3) SO, or (4) SO.? 15. How many kg of activated carbon (a substance used in removing trace impurities) must be mixed with 38 kg of sand so that the final mixture is 28% activated carbon? 16. A gas mixture contains 40 lb of O,, 25 lb of SO, and 30 lb of SO,, What is the composition of the mixture in mole fractions? 17. Saccharin, an artificial sweetener that is 3000 times sweeter than sucrose, is composed of 45.90% carbon, 2.73% hydrogen, 26.23% oxygen, 7.65% nitrogen, and 17.49% sulfur. Is the molecular formula of saccharin (a) CHO,N,S. (b) CH,O;NS, (e) C,H,O;NS, and (d) C;H,O;NS? 18. A mixture of gases is analyzed and found to have the following composition: Co, 12.0%, CO 6.0%, CH, 27.3%, H, 9.9% and N, 44.8%. How much will 3 lb mol of this gas weigh? 19. A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composition: n-C,H 50%, n-C,H12 30%, and n-C,H, 20%. For this mixture, calculate: a) The weight fraction of each component. b) The mole fraction of each component. c) The mole percent of each component. d) The average molecular weight of the mixture. II
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