Pure Calcium is added to water

CaO+2H20-----> Ca(OH)2 + H2 gas

1.)Assume the CA piece is pure (not part oxidized) and weighs 4.5645 g. Assuming the reaction goes to completion, how many grams of Ca(OH)2 should you have made?

2.)Phenolphthalein turns pink in solutions that are 1.0 x 10 to the -5 M in hydroxide ions. The only source of hydroxide ions is Ca(OH)2. Lets assume that the amount of water left behind in the beaker to test for complete transfer is about 3 drops or 0.15 mL

how many moles of Ca(OH)2 would be in the three drops. How many grams of Ca(OH)2?

Ive been stuck on this for a few hours now, How would you set up the stoichiometry? thanks in advance to anyone who can help

For, #1 would I have to convert the grams to moles then multiply by the molecular weight? For the second problem, I'm really not sure where to start the stoichemetric problem