Question

Dich one of the following is a Brønsted-Lowry base? 1) Which one A) (CH3)2N B) CH3COOH C) HNO2 D) HF E) none of the above 12) A volatile liquid is one that A) is highly flammable B) is highly hydrogen-bonded C) is highly cohesive D) is highly viscous E) readily evaporates 13) Consider the following reaction at equilibrium 2NH3 (8) N2(g) + 3H2 (8) Le Chatelier's principle predicts that the moles of Hy in the reaction container will increase with A) a decrease in the total pressure (T constant) B) addition of some N2 to the reaction vessel (V and T constant) C) some removal of NH3 from the reaction vessel (V and T constant) D) an increase in total pressure by the addition of hellum gas (V and T constant) E) a decrease in the total volume of the reaction vessel (T constant) 14) 14) On a clear day at sea level, with a temperature of 25 °C, the partial pressure of N2 in air is 0.78 atm and the concentration of nitrogen in water is 53 . 10-M. When the partial pressure of N2 is _atm, the concentration in water is 20 10-3 M. A) 2.9 B) 4.0 0.68 D) 0.63 E) 1.0 SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 15) London Dispersion Forces tend to _in strength with increasing molecular weight. 15) 16) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 16) Which molecule is the least volatile? A) CH4 B) CH3C CH3F D) CH3Br E) CH31

Answer 1

m) Prensted lowry bave is a proton aeceptor (AMEZNE И — А Removal of A decrease in total pressure shirts the reaction towards more moles of gas 2N143 (9) = N2(g) + 314208) - change in number of males on= (143)-2=+2 114) Ideal gas equation PV=nRT OP D= ART pse (e= concentration) . = ERT - PE AY ) = 0-78 x 1503 1904 '= 290tm (A) To enereare 16) Lester Gereater the strength of intermolecular foree greator lener will be the volatility, As molar masin inereares strength of Lonelon dispersion force Merear. Order of molar mais, Cty I> Elts for > Ettels eltz F etty Ļ Cetta I PS lens volatile (Greater Lonelon dospersion force)