### Fundamentals Textbook Homework E.23 part D

Posted:

**Sat Oct 17, 2020 2:37 pm**Calculate the amount (in moles) of (d) H2O in 2.00 g of Na2CO3⋅10H2O

For this question, I found the molar mass of Na2CO3⋅10H2O to be 19100 g. mol^-1. I divided 2g by this molar mass to get 1.05x10^-4 moles Na2CO3⋅10H2O. I then multiplied this by 10 because there are 10 (molecules?) of H2O to get 0.00105 moles of H2O.

My answer is wrong, and I think I went wrong when multiplying by 10 but I am unsure how else to get the moles of just H2O. Any help would be greatly appreciated!

For this question, I found the molar mass of Na2CO3⋅10H2O to be 19100 g. mol^-1. I divided 2g by this molar mass to get 1.05x10^-4 moles Na2CO3⋅10H2O. I then multiplied this by 10 because there are 10 (molecules?) of H2O to get 0.00105 moles of H2O.

My answer is wrong, and I think I went wrong when multiplying by 10 but I am unsure how else to get the moles of just H2O. Any help would be greatly appreciated!