8.. When temperature increases, the speed or movement of the particles or atoms will However, when temperature decreases, the speed or movement
of the particles or atoms will
A. increase, increase
B. increase, decrease
C. decrease, decrease
D. decrease, increase

During which time interval does the object travel approximately 10 meters

Which statement describes james chadwick’s discovery.

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.)