Which of the following is true of clouds at medium altitudes?

If an atom has 12 protons and 13 neutrons

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?

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?