Calculate the number of moles in 19.3g of NaCl

0.33 mole

Explanation:

Let the number of moles be represented by x.

We should note that 1 mole of NaCl = 58.44g

Therefore, the number of moles in 19.3g of NaCl will be :

= 19.3/58.44

= 0.33 mole

Therefore, the number of moles in 19.3g of NaCl is 0.33 mole

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.