If we assume that the pressure and temperature are standard the volume of one

# If we assume that the pressure and temperature are

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If we assume that the pressure and temperature are standard, the volume of one  mole is 22.4 liters. To determine the number of moles, use the following  equation.   Number of moles = Mass  ÷  Mass of 1 mole   Let’s determine the mass of 1 mole of C3H8 and CO2   For C3H8, mass = 3 * 12 + 8 = 44 grams   For CO2, mass = 12 + 2 * 16 = 44 grams   Let’s convert 20 pounds to grams.   Mass = 20 lb * 454 g/lb = 9080 grams   Mass of 1 mole = 3 * 12 + 8 = 44 grams   Number of moles = 9080  ÷  44   1/3 = 9080  ÷  44/ Moles of CO2   Moles of CO2 = 3 * 9080  ÷  44   This is approximately 619 moles. This is the number of moles of CO2. To  determine the mass, multiply by 44.   Mass = 44 * 3 * 9080  ÷  44 = 2.72*10^4 grams 9. Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction CaF 2 + H 2 SO 4 CaSO 4 + 2HF 3 Copyright © 2016 by Thomas Edison State University . All rights reserved.
In one process 6.00 kg of CaF 2 are treated with an excess of H 2 SO 4 and yield 2.86 kg of HF. Calculate the percent yield of HF. (5 points) CaF2= 6000g/78.0748 = 7.68 Mols HF= 2*76.8=153.6 Mass HF= 153.6 * 20.0064 g/mol = 3.075kg 2.86kg/3.075kg *100%= 93% (Reference: Chang 3.89) 10. Certain race cars use methanol (CH 3 OH; also called wood alcohol) as a fuel. Methanol has a molecular mass of 32.0 g/mol and a density of 0.79 g/mL. The combustion of methanol occurs according to the following equation: 2CH 3 OH + 3O 2 2CO 2 + 4H 2 O In a particular reaction 2.00 L of methanol are reacted with 80.0 kg of oxygen.

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• Fall '15
• Chemistry, Reaction, Sulfuric acid, Thomas Edison State University, Edison State University

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