posted by Jina .
I really need help on this problem...
Hydrocarbon Formula Delta H (kj/mol)
1,3-Butadiene C4H6(g) 111.9
a) calculate the fuel value in kJ/g for this compound and determine the percentage of hydrogen by mass.
I've tried it for hours yet I can't figure out how to do this.
Please help thank you@!!
You have kJoules/mol. How many grams of this compound are in one mole? Divide your given number by the grams in a mole to get kJ/g.
Percentage of H?
6(atomic mass H)/molmassC4H6 * 100
Here is the problem-
Calculate the total enery change when warming 5.00g of ice at -15 degrees celcius to liquid water at 25 degrees celcius.
could i get a step by step solution and answer to this problem??? What is the thermal energy change as 175.og of water drops from 75.00 degrees celcius to 15.50 degrees celcius? help?