Zn + 2HC1 ZnCl + H2 ¿Cuántos moles de cloruro de zinc se obtendrán
si reaccionan seis moles de zinc y doce moles de
ácido clorhídrico?

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

the answer is c i believe

thats a little if u want the answer just look it up on google thats what i do haha : )