0chasapressureof245atmthemassofthegasis321

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Unformatted text preview: xide (NO) gas. What was the percent copper (by mass) in the sample? 3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O -48) A 5.00 L container of unknown gas at 25.0 °C has a pressure of 2.45 atm. The mass of the gas is 32.1 g. What gas is in the container? SO2 NO2 SO3 F2 Cl2 9) A 1.37 L vessel contains He at a temperature of 24.5 °C and a pressure of 205 mmHg. A 721 mL vessel contains Ne at a temperature of 36.2 °C and a pressure of 0.185 atm. Both of these gases are placed in a 2.00 L vessel at 302 K. What is the final pressure (in atm) in the 2.00 L vessel? 10) How much work, in joules, is done when the pressure is suddenly released from 4.56 atm to 1.25 atm on 45.4 g of O2 at 45 °C? 11) Using the heat of combustion of methanol as -726.6 kJ and the following data: C(graph) + 1/2O2 → CO(g) ΔH° = -110.5 kJ C(graph) + O2(g) → CO2(g) ΔH° = -393.5 kJ H2(g) + 1/2O2(g) → H2O(l) ΔH° = -285.8 kJ Determine ΔH° for the following reaction: CO(g) + 2 H2(g) → CH3OH(l) -512) Calculate △Hof of octane, C8H18(l), given the enthalpy of combustion of octane to CO2(g) and H2O(l), -5471 kJ/mol, and the standard enthalpies of formation of CO2(g) and H2O(l), -393.5 kJ/mol and -285.8 kJ/mol, respectively. 13) What is the wavelength of a bullet that is 0.450 g traveling at 2000. m/s? 14) What is the orbital designation for the quantum numbers n = 2, l = 1? 15) Which one of the following set of quantum numbers would not be allowed? n A) = 3, ℓ = 2, mℓ = -1 n B) = 3, ℓ = 2, mℓ = 1 n C) = 3, ℓ = 1, mℓ = -1 n D) = 3, ℓ = 0, mℓ = 0 n E) = 3, ℓ = 3, mℓ = 1 16) Choose the groups of molecules below in which all the molecules have a net dipole moment. A) iHCl3, O2, H2O S B) F, H2O, N2 H C) Cl4, HCl, NH3 C D) F, H2C=CH2, H2O H E) F, CH3Cl, H2O H -617) Draw the Lewis dot formulae for CO, NO and CH2PH3 18) According to principles of VSEPR theory specify the electron pair geometry and hybridization for the species AsCl52- 19) For BeCl2, the dipole moment of the molecule, hybridization on the central atom, and nu...
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This document was uploaded on 01/29/2014.

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