Finding moles of water in a 5g BaCl2·H2O sample

[crayzlilgurl]

[SOLVED] A chem problem...help please

I don't know how to answer this question. I have to find the number of moles of water in the hydrate BaCL2*H2O. SOwwie i don't now how to make the 2 smaller. The mass of the hydrate is 5g, the Mass of lost
water is .7 grams and the anhydrous compound is 4.3 grams. Please help me. Thanks

 

[Chemicalsuperfreak]

Originally posted by crayzlilgurl
I don't know how to answer this question. I have to find the number of moles of water in the hydrate BaCL2*H2O. SOwwie i don't now how to make the 2 smaller. The mass of the hydrate is 5g, the Mass of lost
water is .7 grams and the anhydrous compound is 4.3 grams. Please help me. Thanks

It's pretty easy. You know that there was 0.7 grams of water originally. You, should, also know that water is 1/18 moles per gram. I can't make it any easier for you than that without telling you the answer, and that wouldn't do you any good.

 

[crayzlilgurl]

thanks...i noe wut to do it just all the numbers i was given confused the heck outta me...

 

[chris2009]

i don't kow eitehr