What is the mole to mole relationship between the copper and silver respectively?A. 2:10B. 2:1C. 1:1D. 1:2E. 8:3How many moles of NH4Cl are in 5g of NH4Cl? The MW=53.492). To calculate the number of moles divide the grams by the molecular weight.A. 534 mol NH4ClB. 5 mol NH4ClC. 0.093 mol NH4ClD. 10.698 mol NH4ClE. 20 mol H20What was the initial heat energy before mixing the cold and hot water? To calculate this you need to use the formula : Qinitial= m1CpT(of the hot water) m2CpT(of the cold water) where Q is the heat energy m is the mass Cp is the specific heat of water 4.18 J/goC and T is the temperature. Choose the closest answer.A. 7JB. 218 JC. 1056 JD. 9 459 JE. 17 034 JThe molecular weight of propane is 44.10 g/mol.Based on the number of grams of gas measured how many moles is this? = mass / molecular weight) Choose the closest answer.A. 6.2 x 10-3 moleB. 5.2 x 10-3 moleC. 4.1 x 10-3 moleD. 1.28 x10-11 moleE. 9.8 x 10-2 moleIn a real gas (non-ideal) the molecules can interact with each other. Suppose that the primary interaction between the molecules is attractive.How would this affect the results?A. There would be no difference.B. Moving backward and forward simultanouslyC. The pressure becomes independent of the identity of the molecules.D. The pressure would be lower for a more strongly attracting gas.E. The pressure would be higher for a more strongly attracting gas.Which of the following represents the balanced equation for the reaction?A. Cu2CO3(OH)2*H2O -> 2CuO 2H2OB. Cu2CO3(OH)2*H2O -> 2CuOC. Cu2CO3(OH)2*H2OD. Cu2CO3(OH)2*H2O -> 2CuO 2H2O CO2E. Cu2CO3(OH)2*H2O -> CuO H2O CO2What is the correct sign ( or -) to place in front of the dH molar enthalpy for the reaction between HCl and NH3?A. d H = – 0B. dH because the reaction absorbed heat from the surroundingsC. dH because the reaction released heat into the surroundingsD. – dH because the reaction released heat into the surroundingE. – dH because the reaction absorbed heat from the surroundings
