Find the mass of water (H2O) needed to react with 150 grams of potassium (K)

2K(s) + 2 H2O (g)-2KOH +H2(g)

How do I get the number of moles in H2O?
Desperate to understand this.
I got K= 150g./39.0983=3.84 mols of K.

Then would it be 3.84(2mols H2O/7.68)
How do I get the proper equation to figure out what 2 moles of H2O would be.
If you can walk me through this problem I will understand it and be able to continue with my work. Please help.

See my earlier post. Repost if you have other questions about it.

drbob222 can you please answer the science questions on my post

Rachael.

See your post. I've looked at it.

did you write anything because it doesnt show

It does now.

the one that says science rachel

do you know anyone who can help me with those questions if you do can you please let them know thanks