× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
buffyoumofo buffyoumofo
wrote...
Posts: 126
Rep: 3 0
12 years ago
the reaction between nitric oxide(NO) and oxygen to form nitrogen dioxide (NO2) is a key step in photochemical smog formation:

2NO(g) + O2(g) ------------ 2NO(g)

-How many grams of O2 are needed to produce 2.21 g of NO2?
Read 4783 times
3 Replies

Related Topics

Replies
wrote...
#1
12 years ago
2*molecular weight of NO reacts with 16 gms of O2.
Therefore 2.21 gms reacts with16/15*2.21gms.
wrote...
#2
12 years ago
Calculate the mol of NO2 in 2.21g:

2.21 g * (1 mol/46g) = 0.048 mol NO2

Since the ratio od NO2 : O2 is 2:1 there will be half the amount of O2 required to make this amount of NO2.  So mol of O2 needed = 0.048/2 = 0.024 mol of O2

0.024 mol O2 * (32 g/mol) = 0.77 g of O2 are needed
wrote...
#3
12 years ago
The above is only correct if you assume the reaction favors product only. There is an equilibrium that is created.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1255 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 62
  
 854
  
 308
Your Opinion
Which is the best fuel for late night cramming?
Votes: 145
Previous poll results: Where do you get your textbooks?