Over millions of years, how do weathering and erosion change a mountain made of solid rock

List four observations that indicate that a chemical reaction may be taking place

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?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: