Palladium is named after the asteroid Pallas, forms a gaseous compound of the formula Pd(CO)x What is the value of x given the fact that under the same conditions of temperature and pressure, methane (CH4) ?effuses 4.1 times faster than the compound
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- A student ran the following reaction in the laboratory at 759 K: N2(g) + 3H2(g) = 2NH3(g) When she introduced 3.13×10-2 moles of N2(g) and 6.00x102 moles of H2(g) into a 1.00 liter container, she found the equilibrium concentration of NH3(g) to be 6.84×10-4 M. Calculate the equilibrium constant, K., she obtained for this reaction. K. =What mass of gallium oxide, Ga2O3, can be prepared from 29.0 g of gallium metal? The equation for the reaction is 4Ga + 3O2 ⟶ 2Ga2 O3.Chloroform is a volatile (readily changes from liquid phase to gaseous phase) once commonly used in the laboratory but now being phased out due to its ozone depletion potential. If the pressure of gaseous chloroform in a flask is 195 Torr at 25°C and its mass for 1 liter of gas is 1.25 g, what is the molar mass (g/mol) of chloroform? O None of these O 119 g/mol 10.0 g/mol O 76.3 g/mol
- To form S²⁻ ions from gaseous sulfur atoms requires 214 kJ/mol, but these ions exist in solids such as K₂S. ExplainThe following data was collected for n-pentane and isopentane: Compound P, (kPa) n-pentane 282.9 at 70°C 895.5 at 120°C Isopentane 955.9 at 115°C 1152.4 at 125°C а) Develop a correlation for the vapor pressure of Isopentane as a function of temperature. Clearly state the units. b) Calculate the vapor pressure of Isopentane at 120°C. c) Estimate the heat of vaporization of Isopentane by using the data in the table. A closed container contains a mixture of 65.0 mol% n-pentane and 35.0 mol% isopentane. The system is initially all liquid at 120.0°C and high pressure and the pressure is gradually reduced at a constant temperature. d) i. Calculate the pressure (in kPa) at which the first bubble of vapor forms. ii. What is the composition (in mole fractions) of the first bubble of vapor at the conditions found in part (i)? A new mixture contains cyclohexane (Pv=288.3kPa at 120°C), n-pentane and isopentane at 120°C and high pressure. The pressure is reduced at constant temperature to a point…The vapor pressure of component C is 272 torr, and that of component E is 176 torr at 35°C. The C-E solution at 35C with x=0.200 has a vapor pressure of 904.2 torr and vapor composition of x=0.272. 1. Calculate y, for C 2.15 and for E 4.99 : in this solution. 2. Calculate a, for C 2.42 and for E 2.678 in this solution. 3. Calculate p,-p, for component C 2264.38 : (J/mol) and E 857.32 : (J/mol). 4. Calculate AmyG= -1092.22 : (J) for the corresponding ideal solution.
- At what pressure in atm does ethane (C₂H₆) have a density of 37.2 g/L at 75.0 °C?The enthalpy of combustion of hard coal averages −35 kJ/g, that of gasoline, 1.28 × 105 kJ/gal. How many kilograms of hard coal provide the same amount of heat as is available from 1.0 gallon of gasoline? Assume that thedensity of gasoline is 0.692 g/mL (the same as the density of isooctane).The following reaction plays a key role in the destruction of ozone in the atmosphere: Cl(g)+ O3 (g)-> ClO(g)+O2 (g) Given the standard molar entropies (S°) below, calculate the ΔS for this reaction. S°C1O = 218.9 J/mol*K S°O3 = 238.8 J/mol*K S°Cl = 165.2 J/mol*K S°O2= 205.0 J/mol*K _______ J/K = ΔS
- Nicotine, an alkaloid in the nightshade family of plants that is mainly responsible for the addictive nature of cigarettes, contains 74.02% C, 8.710% H, and 17.27% N. If 40.57 g of nicotine contains 0.2500 mol nicotine, what is the molecular formula?The formation constants at 25°C for Fe(CN)4-6 and Fe(EDTA)2– are 1.00 x 1037 and 2.10 x 1014, respectively. Answer the questions below. 1) Calculate K under standard conditions for the reaction Fe(EDTA)2−(aq) + 6CN−(aq) ----> Fe(CN)4−6(aq) + EDTA4−(aq) 2) Calculate ΔG° for the reaction. (kJ/mol)An unknown mixture is known to contain only Ba(OH)2 (MW=171.34 g/mole) and NaOH (MW=40.0 g/mole). If the mixture is known to contain 45% by mass NaOH, and 8.0 grams of the mixture is dissolved completely in 50.0 ml of solution, answer the following. c).If 10.0 ml of a 0.2 M solution of Na2SO4 was added to the 50.0 ml solution, what would be the final concentration of Na+ in solution.