Question

If 25 grams of hydrogen peroxide reacts, how many greams total of water and oxygen gas would you expect? Why would you expect this?
HELP ME PLEASE

Answer 1

Grams, not greams

Answer 2

First draw out the chemical reaction

H2O2 -> O2 + H2O

Second you need to balance it here are videos

https://www.youtube.com/watch?v=ORK4eeKZaYg
https://www.youtube.com/watch?v=UGf60kq_ZDI
https://www.youtube.com/watch?v=RnGu3xO2h74

Third convert 25g moles of H2O2 to moles using the equation

Moles = Grams/molecular mass of H2O2

Finding molecular mass, see video
https://www.youtube.com/watch?v=F9NkYSKJifs

Fourth Using the balance reaction equation convert from moles of H2O2 to moles of O2 and H2O
https://www.youtube.com/watch?v=S6UQX7ZdkTg

Fifth take moles of H2O and O2 determined and convert to grams using the formula

Moles = grams/molecular mass
or to save you the algebra

Moles*molecular mass = grams

Answer 3

if this is a simple decomposition reaction, where the hydrogen peroxide is the ONLY reactant, and the water and oxygen are the ONLY products, we can apply the law of conservation of mass directly.

If you start with 25g of one reactant, and it decomposes completely into two products, those two products must have a total weight of 25g. It doesn't ask to find grams of each, it simply says total grams.

@Australopithecus is correct in the steps to find grams of each, but this particular problem isn't asking for that

Answer 4

Thanks you guys!!! :)