What is the mass of 1.2x10^25 atoms of Helium

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?

What is i fracture in the crust called when land move up, down or sideways

Particles vibrate in a rigid structure and do not move relative to their neighbors.