Which of the following is a TRUE comparison of Gram-positive and Gram-negative cell walls? (CS 8)

The dipole for a covalent bond indicates an unequal sharing of electrons by the atoms. 

The correct chemical formula for the compound formed by Ca and Br is CaBr.

Which choice BEST describes why the invention of the microscope is important to the field of microbiology? (H 2)  

A plot of 1/[BrO-] vs time is linear for the reaction:3 BrO-(aq) → BrO3-(aq) + 2 Br-(aq)What is the order of the reaction with respect to the hypobromite ion, BrO-?

Which one of the following solutes has a limiting van’t Hoff factor (i) of 3 when dissolved in water?

Which statement below regarding the half-life of a second-order reaction is true?

Plasmids are essential for bacterial growth if the bacteria are cultured under optimal growth conditions.  (CS 19, 20)

What are the units of k in the following rate law? Rate = k[X]

Determine the rate law and the value of k for the following reaction using the data provided. NO2(g) + O3(g) → NO3(g) + O2(g) [NO2]i (M) [O3]i (M) Initial Rate () 0.10 0.33 1.42 0.10 0.66 2.84 0.25 0.66 7.10