Ineed . asap! look at the picture below. (9)

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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?