Question

when heated, KCIO3 decomposes into KCI and o2. If this reaction produced 14.5 grams of KCI, how much O2 was produced (in grams)?

I know that I have to balance the equation first... 2KClO3----> 2KCl+3O2

but I don't really know the rest. I know how to convert from moles to grams, but this problem confused me.....


any help would be appreciated.

Answer 1

Are you trying to find the mass of the O2 produced?

Answer 2

If yes let me know to answer your question.

Answer 3

I'm not sure, it says how much O2 was produced (in grams)?.

Answer 4

@korosh23

Answer 5

OK.

Answer 6

First you transfer the grams of KCl to moles of KCl. Then you you use Molar bridge which is using the balanced equation.

Answer 7

Now you have the moles of O2. By the mole birdge.

Answer 8

Simply change moles of O2 to grams of O2 by using molar mass on the periodic table. Be careful, O2 is 32.0 g not 16.0. Additionally, O2 is diatomic element. Remember HOFBrINCl.

Answer 9

Let me know if you needed more help.

Answer 10

i still don't know how to do it till the end.. that's what I got so far..
(14.5g)(1mole/.197)(3mole/1mole) = that should give me the number of moles in O2 I got a .177619moles of O2 >>> do I just convert to grams now?

Answer 11

@korosh23

Answer 12

Yes you have to convert in grams now.

Answer 13

If its possible please give a medal. Thank you.