The atoms and molecules in a gas are in constant motion. temperature is a measure of their speed as they move. how are these related?

a. as temperature decreases, the molecules and atoms move faster.
b. as temperature increases, the atoms and molecules move more slowly.
c. as temperature increases, the molecules and atoms move faster.
d. atoms and molecules always move at the same speed regardless of any temperature change.

Agood hypothesis includes which of the following? a: prediction b: data c: uncertainty d: conclusion

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

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.)