When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an e

Question

When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is a._14^31 Si b._14^30 Si c._16^31 S d._15^30 P e._15^31 P On analysis, an equilibrium mixture for the reaction 2H_2S(g) 2H_2(g) + S_2(g) was found to contain 1.0 mol H_2S 4.0 mol H_2, and 0.80 mol SA_2 in a 4.0 L vessel. Calculate the equilibrium constant, K_a, for this reaction. a. 1.6 b. 3.2 c. 12.8 d. 0.64 e. 0.8 Which one of these elements is not a gas at room temperature? a. chlorine b. fluorine c. nitrogen d. oxygen e. sulfur Which one of the following reactions would you expect to have highest Delta S degree? a. CH_4(g) + 2O_2(g) rightarrow CO_2(g) + 2H_2O(g) b. C_2H_2(g) + 5/2o_2(g) rightarrow 2CO_2(g) + H_2o(g) C. C_2H_4(g) + 3o_2(g) rightarrow 2CO_2(g) + 2H_2O(g) d. C_2H_6(g) + 7/2O_2(g) rightarrow 2CO_2(g) + 3H_2O(g) What is the osmotic pressure of a glutton that contains 13.7 g of propyl alcohol (C_3H_2OH) dissolved in enough water to nuke 500. mL of solution at 27 degree C? a. 0.0100 atm b. 0.0140 atm c. 0.0370 atm d. 0.456 atm e. 11.2 atm For the following reaction at equilibrium in a reaction vessel, which one these changes would cause the Br_2 concentration to increase? 2NOBr(g) 2NO(g) + br_2(g) Delta H degree = 30 kJ/mol a. Lower the temperature. b. Remove some NO. c. Remove some NOBr. d. Compress the gas mixture into a smaller volume. e. Add a catalyst

Explanation / Answer

7. d

8. b

9. e

10. d

11. e

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