Gold is isolated from rocks by reaction with aqueous cyanide, CN−: 4Au(s)+8NaCN(aq)+O2(g)+H2O(l)→4Na[Au(CN)2](aq)+4NaOH(aq) The [Au(CN)2]− ion can be converted back to Au(0) by reaction with Zn(s) powder. Write a balanced chemical equation for this reaction.
3. Consider the following reaction: 2 SO2 (g) + O2 (g) → 2 SO3 (g) AH.x = -197.6 kJ a. If 285.3 g of SO2 is allowed to react with 158.9 g of O2, what is the limiting reactant and theoretical yield of SO3 in liters if the reaction is performed at 315 K and 50.0 mmHg? How much of each reactant remains at the end of the reaction? [10] LR: SO TY: SO2 remaining: O2 remaining: Imol soa 64.000log...
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H20 (1) --> 2 H2SO4 (aq) ? 02 mol SO2 2 mol H2SO4 2 mol H2SO4 2 mol O2 0 1 mol O2 2 mol H20 O 2 mol O2 1 mol O2 2 mol H20 2 mol SO2 Question 1 1 pts What do the coefficients in a balanced equation tell us? Mark ALL that...
4. Given the reaction: CH4 (8) + 2 O2(g) → CO2 (g) + 2 H20 (8) where AH = -891 kJ Calculate the enthalpy change if 1.00 g of methane (CH) is burned in excess oxygen.
1) 2) 3) 4) C3H8(g) + 5 O2(g) = 3 CO2(g) + 4H2O(1) AH = -2220 kJ Decreasing the temperature will result in shift the equilibrium to the right shift the equilibrium to the left Keq is decreased O no effect in shifting the equilibrium more information is needed Which of the following expressions is the correct equilibrium-constant expression for the reaction below? P4010(s) = P4(s) + 5 O2(g) [02]-5 O [0215 [P4010] [Pd][02] [P][0215 O [P4010] [P4010) [P][0,1175 A...
Consider the reaction shown. 4 HCl(g) + 02(g) 2 CL2(g) + 2 H2O(g) Calculate the number of grams of Cl2 formed when 0.375 mol HCl reacts with an excess of o2 Consider the reaction shown. 4 HCl(g) + O2(g) + 2Cl2(g) + 2 H,0(g) Calculate the number of grams of CI, formed when 0.375 mol HCl reacts with an excess of o, bo
1. A degreasing agent, tetrachloroethylene, is produced in the reaction CH4(g) +4 HCl(g) +2 02(g) → C2C14(1) + 4H2O(1) AH° (kJ/mol): 52.26 -92.31 - 285.8 a) determine AH°for CCl4(1) AH' - 878.5 kJ a) AH° for C,CL(1) = b) How much heat (kJ) would be evolved when 7.5 kg of CH4(g) reacts completely (with stoichiometric amounts of HCl and O2)? b) heat, do = c) Using the equation for work done by/on the system; w=-P AV, calculate the amount of...
The thermochemical equation for the reaction is shown below: 4 Al(s) + 3 O2(g) → 2 Al2O3(s) AH = -3352 kJ How much heat is released when 12.1 g of Al react with O2(g) at 25 °C and 1 atm? 0 - 104 kJ 0 -3.59 x 105 kJ -1.50 x 103 kJ O-376 kJ A 77.0-mL sample of a 0.203 M potassium sulfate solution is mixed with 55.0 mL of a 0.226 M lead(II) nitrate solution and this reaction...
2 P4 (8) + 6 02 (g) 2 P406 (5) AH = -3280.2 kJ 4 P4 (8) + 20 02 (8) 4P,010 (5) AH=-11760.4 kJ P.06 () + 202 (Ⓡ) P.010 (5) 3.5 points Save Answer Using the information from the given reactions, the enthalpy of reaction for the reaction between P406 and Oz would be figures. 6. Be aware of significant Minh
Question 8 of 27 > Consider the reaction shown. 4 HCI(g) + O2(8) 2012(g) + 2 H2O(g) Calculate the number of grams of Cl, formed when 0.115 mol HCl reacts with an excess of o,