What is demand?

a. a table that lists the quantity of a good all consumers in a market will buy at each different price
b. the desire to own something and the ability to pay for it
c. consumers buying more of a good when its price decreases and less when its price increases
d. a graphic representation of a demand schedule

What layer of the atmosphere is directly above the troposphere?

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.)

Draw the structure for 5-isopropyl-2-methyl-3-nonene