Kilojoules and kilograms confusion!

[Mahnoorfatima]

Theres this question in chemistry theory paper 22 GCE cie.
Where It says
IN the reation when 3 moles of hydrogen react 49 kJ of enerdyis realsed calculate how much energy will be released when 500 kg of hydrogen react.
??? Now it also says that give your answer in kilo joules. How whould I converd kg into kJ??? PLEASE HELP!

 

[AbbbbY]

You're not supposed to convert kg into kJ, you're supposed to find moles from kg and use the ratio to find energy.

500kg of H2 = 500,000/2 = 250,000 mols

3 mol : 49 kJ
250,000 mols = 4,083,333.3 kJ

 

[Mahnoorfatima]

Ohhhhh right right.... Thanks dude!