Aballoon’s internal pressure is 1.25 atm, and its volume is 2.50 l. if the balloon is taken to the bottom of the ocean (pressure = 95.0 atm), what would be its new volume? assume that the temperature does not change. (round to the nearest hundredth place) l

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

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.)