A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
If you burn 42.7 g of hydrogen and produce 382 g of water. How much oxygen reacted?
anonymous
 one year ago
If you burn 42.7 g of hydrogen and produce 382 g of water. How much oxygen reacted?

This Question is Open

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1\[\color{red}{\sf 2H_2~(g)~ + ~O_2~(g) ~\rightarrow 2H_2O~(l)}\]You can either use the 42.7 g \(\sf H_2\) or you can use the 382 g \(\sf H_2O\) to find how much \(\sf O_2\) was used due to The Law of Conservation of Mass in a chemical reaction. It will approximately give you the same result. \[\sf 382 ~g~ H_2O ~ ~42.7~g ~H_2 = 339~g ~O_2 \] Let's check this using Stoichiometry. \[\sf 42.7~g~ H_2 ~\times~ \frac{1~mol~H_2}{2.02~g~ H_2} ~\times~ \frac{1~mol~O_2}{2~mol~H2}~\times~ \frac{31.9~g~O_2}{1~mol~O_2} \approx 338 ~g~O_2\]\[\sf 382~g~H_2O~\times~\frac{1~mol~H_2O}{18.0~g~H_2O}~\times~\frac{1~mol~O_2}{2~mol~H_2O}~\times~\frac{31.9~g~O_2}{1~mol~O_2}~\approx 339~g~ O_2 \] So you could see that they pretty much give you the same result when you subtract the two amounts.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.