23. An antique automobile bumper is to be chrome plated to prevent corrosion. The bumper, which is dipped
into an acidic Cr2074 solution, serves as a cathode of an electrolytic cell. If the current is 21.4 amperes, how
long will it take to deposit 1.72 x 102 g of Cr(s) onto the bumper?

What happens to isotopes that are unstable?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

The vapor pressure of ethanol is 1.00 × 102 mmhg at 34.90°c. what is its vapor pressure at 61.61°c? (δhvap for ethanol is 39.3 kj/mol.)