At 298 K, a gas in a rigid cylinder with a movable piston has a volume of 145 mL and a pressure of 125 kPa. What is the new pressure of the gas if the volume is halved? (1) 69 kPa (2) 93 kPa (3) 160 kPa (4) 250 kPa

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 3.75 mol fe and 8.70 mol nio(oh) react?