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1. Answer the following questions: a) can Al3+(aq) oxidize tin (Sn) under standard-state conditions?; b) would it be OK to store an aqueous AlCl3 solution in a tin container?; c) can Sn2+(aq) oxidize aluminum (Al) under standard state conditions?; d) would it be OK to store an aquous SnCl2 solution in an aluminum container?
A. a) yes; b) yes; c) no; d) noB. a) no; b) no; c) yes; d) yesC. a) yes; b) no; c) no; d) yesD. a) no; b) yes; c) yes; d) no
2. The exothermic reaction NH3(g) + HCl(g) ? NH4Cl(s) proceeds spontaneously at 25°C even though there is a decrease in disorder in the system (gases producing a solid). Why?
A. the exothermic reaction increases the temperature from 25°C to a higher temperature which increases the T?S componentB. there is a phase change from gases to solid which means ?G is zero which, when combined with a negative ?H, results in a spontaneous processC. the decrease in entropy of the system is offset by an increase in the entropy of the surroundings caused by the absorption of heat by the system from the surroundingsD. the decrease in entropy of the system is offset by an increase in the entropy of the surroundings caused by the release of heat from the system to the surroundings
3. The equilibrium reaction CaCO3(s) ? CaO(s) + CO2(g) reaches ?G° = 0 at 835°C. At this temperature:
A. ?H° = ?S°B. the percent yield of CaO reaches 100%C. the reaction becomes exothermicD. the pressure of CO2 is 1 atmE. the decomposition of CaCO3 begins
the utilization of one glucose molecule is involved d. oxygen is produced e. none of the above. Which answer is correct and WHY?
What is the number of H's per signal and the splitting for each signal for 2 chloropropane in an NMR?
An aqueous solution of nitrous acid (HNO2) has a ?G= 19.1 kJ. What is the pH when [NO2-]=1.00 M, [HNO2]=1.00 M, and the ?G=0?
Can anyone help with with drawing the net dipole moment vectors from bond dipoles and the net dipole moment vectors
Trimyristin is one of a number of natural products found in nutmeg, including the one which gives it its characteristic odor. Bases on the chemical properties of trimyristin and the amount of inpurity found when the extracted trimyristin was re-cr..
Calculate mass, mole fraction and avg. molecular weight of air, Calculate the constituent (a) mass, (b) mole fraction (c)average molecular weight of air at 25 degree centigrade, 1 atm, and molar density of all listed gases
Use the van der Waals equation of state to calculate the pressure of 3.20 mol of Xe at 481 K in a 5.80-L vessel.
What mass of CCl2F2 substance must evaporate in order to freeze 135 g of water initially at 15 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
Need to make an aqueous solution of 0.233 M potassium iodide for an experiment in lab, using a 250 mL volumetric flask. How much solid potassium iodide should you add?
Calculate the cell potential for the following reaction that takes place in an electrochemical cell
What is the resultant pressure if 3.7 mol of ideal gas at 273 K and 1.97atm in a closed container of constant volume is heated to 446 K.
22.3 g of a substance X dissolves in enough water to make 0.507 L of a 0.779 M solution. Calculate the molar mass of X in g/mol.
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