The conversion of acetyl chloride to methyl acetate occurs via the following two-step mechanism: :: OCH :0: Bch, I. X. 121 slow fast 7 8CH • BỘ acetyl chloride methyl acetate If the concentrations of both "OCH 3 and acetyl chloride were increased 2 times, what would happen to the rate of the reaction? A) Rate would increase 16 times
B) Rate would increase 2 times
C) Rate would become one-fourth
D) Rate would increase 4 times

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Chemistry worksheet - i am not sure what they are asking for exactly?