Please help with this question!

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?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy