1. In the following problem, first find how many grams of oxygen would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)?
How many grams of oxygen would be used? See attached file for full problem description.© BrainMass Inc. brainmass.com October 24, 2018, 8:40 pm ad1c9bdddf
Please see the attached file.
1. Rewrite and balance the reaction:
C5H11OH + 7.5O2 = 5CO2 + 6H2O
MW (C5H11OH) = 5*12+12+16 = 88 (g/mol)
MW (O2) = 32 (g/mol)
MW (H2O) = 18 (g/mol)
According to reaction balance, 1 mol of C5H11OH reacts with 7.5 mol of O2.
Number of mole of C5H11OH = 230/88 = 2.61 (mol)
Thus number of mole of O2 required = 2.61*7.5 = ...
The solution provides detailed explanations and answer for the problem.
Problem Set - Help setting up
1 How many grams of oxygen are required to fill a 4.5 x 103 liter hyperbaric chamber at a pressure of 225 cm Hg and 62 F? If the same quantity of oxygen, was pumped back into a gas cylinder at a pressure of 200 atm and at 75 F, what would the volume be?
2 Any number of green plants can photosynthesize glucose (C6H12O6) in the presence of carbon dioxide and water, and producing oxygen as the remaining product. 250 ml of oxygen was produced. The oxygen was collected over water at 27C and at a pressure of 755 Torr. The vapor pressure of water at 27C is approximately 26mm Hg. What mass of glucose was produce? How many grams of water were used in this biosynthesis?
3 The solubility of laughing gas, dinitrogen monoxide, in water is 7.50 mg per cent by mass at 760 Torr and 25C. If the density of the resulting solution is 1.01 grams per milliliter, what is the morality of the resulting solution? What is the % of the volume?
4 The specific heat of fusion of silver is 25.0 calories per gram and the specific heat of silver is 0.25 Joules per gram per degree C. Calculate the energy required to melt 1.0 moles of silver if it starts as a solid at 25 C below its normal melting point and is heated to its normal melting point.
5 One of the methods for the determination of lead is the titration of lead solutions with a standardized potassium chromate solution. If 42.50 ml of a solution of 6.357 grams of potassium chromate per liter was used to completely react with a sample of 10.000 grams of a soluble lead salt, what is the percentage of lead in the sample?
6 To examine the soda fountain methods of making carbonated beverages by measuring the amount of acid in a fixed volume of Coca-Cola. Use a 250 ml sample for all analysis and make each batch with a separate CO2 cylinder so that the carbon dioxide content in each batch would be as uniform as possible. In a typical experiment, saturate the Coke solution with all the CO2 in the cylinder. Titrate the 250 ml sample of a phenolphthalein endpoint with 7.65 ml of a sodium hydroxide solution that contains 5.670 grams of sodium hydroxide per liter. How much carbon dioxide was in the saturated solution?
7 In the reaction of copper with concentrated nitric acid, the products are copper (II) nitrate, water and nitrogen monoxide, sometimes called nitric oxide. If 150 ml of nitric oxide were collected over mercury at 42C and under a pressure of 74.5 cm of mercury, how many grams of copper had reacted?
8 If all the nitric oxide from above problem was allowed to react with oxygen, a red-brow gas, nitrogen dioxide is formed. How many grams of nitrogen dioxide would be formed? How many oxygen molecules would be needed for this reaction?
9 Consider the carbon dioxide cylinder mentioned in problem 6 above. If the cylinder contains 27.35 grams of carbon dioxide, what volume would the gas occupy at 360 Torr and 850F?
10 Ammonia and gaseous hydrogen chloride combine to form ammonium chloride. If 4.21 liters of ammonia at 27C and 1.02 atm is combined with 5.35liters of hydrogen chloride at 26C and 0.998 atm, what mass of ammonium chloride will be produced? Which gas is in excess?
11 A tank contains 3.0 moles of nitrogen, 2.0 moles of oxygen, 1.5 moles of helium, and 1.8 moles of carbon dioxide at 45C and under 1000 atm. Calculate the partial pressure of each gas in the mixture in Torrcellis.
12 A weather balloon is filled with 1.0 liter of helium at 23C and 1.0 atm. What volume does the balloon have when it has risen to a point in the atmosphere where the pressure is 200 Torr and the temperature is -31C?
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