When dissolved in 1000 g of water, which chemical compound will produce a solution with the greatest freezing point depression?

a) 5.0 g of sodium chloride (nacl)
b) 9.2 g of potassium chloride (kcl)
c) 11 g of calcium fluoride (caf2)
d) 20 g of glucose (c6h12o6)

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

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.)