11. 2.4g Na2SO4 to molecules 12. 5.50 x 10^22 atoms CaSO4 to grams

13. 6.8g (NH4)3PO4 to moles.

Enough of a monoprotic weak acid is dissolved in water to produce a 0.0172 m solution. if the ph of the resulting solution is 2.39 at 20 °c, determine the pka for the acid.

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?

Acontrol during an experiment. might change remains constant does not exist does change