How many molecules are in 83.2 g of chlorine gas (Cl2)? Group of answer choices
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules

Try everything or guess, that will always work

1.42 x 10^24 molecules

1.78 x 10^28 molecules

7.04 x 10^23 molecules

14.2 x 10^24 molecules

Explanation:

"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"