Hey Guys! Can anyone help me, I'm kinda confused here.

How many moles of calcium hydroxide are needed to produce 73.7 milliliters of water, if the density of water is 0.987 g/mL? Show all steps of your calculation as well as the final answer.

HCl + Ca(OH) 2 → H2O + CaCl2

Question

Hey Guys! Can anyone help me, I'm kinda confused here. 

How many moles of calcium hydroxide are needed to produce 73.7 milliliters of water, if the density of water is 0.987 g/mL? Show all steps of your calculation as well as the final answer. 

HCl + Ca(OH) 2 → H2O + CaCl2

nechirwan · Answer

first balance the equation
2 HCl + Ca(OH)2 --> 2 H2O + CaCl2

anonymous · Answer

It isn't balanced already?

nechirwan · Answer

the mole ratio of calcium hydroxide : water is 1:2
(73.7 mL) x (0.987 g/mL) / (18.0153 g H2O/mol)=4.037 mole of water
 4.037/2= 2.02 moles Ca(OH)2

anonymous · Answer

Ohhhh I think I get it now...Thank you! 
Would you maybe have some study tips for Chemistry? I'm finding it difficult to grasp concepts.

nechirwan · Answer

just do every  thing step by step

anonymous · Answer

Okay thank you

nechirwan · Answer

welcome