2. The ocean contains a variety of minerals and ionic compounds. A scientist isolates a specific ion from a sample of ocean water and determines that it has 12 protons and 12
neutrons with 10 orbiting electrons.

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 4.20 mol fe and 6.70 mol nio(oh) react?