What is the ph of 0.020 M Ba(0H)2

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?

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 3.75 mol fe and 8.70 mol nio(oh) react?

372 ml is the volume of aluminum, density is 2.70 g/ml what is the mass in grams