Which of the following pairs of reactants will react together to produce water (h2o) as one of the products? a. fe(oh)3 and cuo b. cu(oh)2 and h2s c. mgo and ca(oh)2 d. so3 and h2o

The answer is Fe(OH)3 + H2SO4 -> H2O + Fe2(SO4)3 and they're not balanced.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"