Question

MC7 The average kinetic energy of the molecules in a gas at room temperature is about 3.5 kJ/mol. How does this energy compare with the energy of a hydrogen bond in water? A. A hydrogen bond is about 10 times weaker B. A hydrogen bond is about 10 times stronger. C. Both values are more or less the same MC8 In homeopathy, a 20C dilution means 20 consecutive 100-fold dilutions. Suppose you start with a 1M solution of glucose. How many molecules of glucose do you expect to have in 1L of a 20C homeopathic solution of glucose? A. 1040 B. 0.05 C. 6 x 10-17 D. 6 x 10 17 E. 1040 MC9 You have 10 mL of a solution and add 90 mL of solvent. Which statement is correct? A. You have performed a 1:90 dilution B. You have performed a 9-fold dilution C. You have performed a 1:9 dilution D. You have performed a 10-fold dilution E. You have performed a 1:100 dilution MC10 How many resonance structures can be drawn for the ion NO3 (nitrate)? A. 1 B. 1.5 C. 2 D. 3 E. none

Answer 1

Mc 7: B A Hydrogen bond is 10 times stronger. Mc 9: C you have performed a 1: 9 ditection. Mc 10: 3 resonance structures