Look at the piccc, help

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

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?

H2o is a single atom of wat true or false?