The decomposition of hydrogen peroxide is first order in H2O2. 2H2O2 (aq)--> 2H2O2(l) + O2(g)
The rate constant for this reaction at 20 degrees centigrade is 1.8x10-5 s-1.
If the concentration of H2O2 is 0.75M determine :
(a) the concentration of H2O2 remaining after 3h and
(b) how long it will take for the H2O2 concentration to drop to 0.10M

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 5.35 mol fe and 7.65 mol nio(oh) react?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

What is the effect of returning nuclear reactor cooling water back into bodies of water?