Question

Help Idk how to do this! multiple choice.

Answer 1

products - reactants = 64.2 - 0

Answer 2

so its 0j?

Answer 3

no, 62.4 kJ - 0 = 62.4 kJ

Answer 4

but thats not in my options? @aaronq

Answer 5

yes it is, you need to convert it to J

Answer 6

and express it in scientific notation

Answer 7

how to convert it?

Answer 8

1 kJ = 1000 J

Answer 9

wait so do I do 62.4 / 1000?

Answer 10

@aaronq

Answer 11

hm you're doing it wrong.. the conversion is analogous to converting from kilometers to meters.

1 km = 1000 m
1 kJ = 1000 J

so if you have to travel 62.4 km.. you would travel 62.4 km x 1000 m/1km

it's the same thing for what you're doing

Answer 12

I still don't get how that gets me one of my answers below?

Answer 13

62.4 x 1000 = 62400

Answer 14

now express it scientific notation

Answer 15

6.24 x 10^2 ? Im sorry I dont really know how to express it in scientific notation?

Answer 16

6.24x10^4