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Calculate the standard enthalpy of formation per mole of ZnS(s).
ZnS(s) + O2(g) → ZnO(s) + SO2(g) ΔH = −878.2 kJ
ΔHfo(ZnO(s)) = −348.3 kJ/mol
ΔHfo (SO2(g)) = −296.8 kJ/mol
You mix 20g of potassium nitrate with 100mL of water at 20oC. Describe the solution in terms of saturation.
A drug used to treat hypertension undergoes a decomposition reaction to give an insoluble product. Calculate the temperature at which this reaction starts to become spontaneous if the enthalpy of reaction is 51 kJ/mol and the entropy of the reaction at this temperature is 118.74 J/mol-K
1.0 moles of potassium fluoride are dissolved to make 0.10 L of solution, what is the molarity of the solution?
Calculate the volume occupied by 22.12 g of sodium phosphate at 6.54 atm and 76 degrees Celsius.
write the rate equation
a lead fishing weight contains 0.85mol of lead atoms. what is its mass?
100 g of manganese dioxide reacts with 300 g of hydrochloric acid in the reaction shown below.
MnO2 + 4HCl -> MnCl2+ 2H2O + Cl2
(Use the following molar masses: MnO2= 86.9g/mol HCl = 36.5g/mol ; MnCl2= 125.8g/mol; H2O= 18.02g/mol and Cl 2 =70.9 g/mol.
a. Which reactant is limiting?
b. Which reactant is excess?
c. What is the theoretical yield of Cl2?
d. What is the percent yield of the reaction if 75.0 g of Cl2 was produced
How many moles of FeCl2 are produced when 16 grams of Fe reacts with HCl?
