11ashh
Badges: 7
Rep:
?
#1
Report Thread starter 3 years ago
#1
A student hears 5.29 grams of Sr(No3)2 and collects the gas at RTP.
2Sr(No3)2 - 2SrO + 4NO2 + O2
Calculate the volume of gas in dm3
Molar mass of Sr(No3)2 = 211.6 g mol -1


Any ideas of how to do this?
0
reply
MexicanKeith
Badges: 12
Rep:
?
#2
Report 3 years ago
#2
(Original post by 11ashh)
A student hears 5.29 grams of Sr(No3)2 and collects the gas at RTP.
2Sr(No3)2 - 2SrO + 4NO2 + O2
Calculate the volume of gas in dm3
Molar mass of Sr(No3)2 = 211.6 g mol -1


Any ideas of how to do this?
First you need to calculate the number of moles of Strontium Nitrate in 5.29 grams

From the equation of the reaction you then know how many moles of gas are produced for each mole of nitrate reacting, so you can work out how many moles of gas are produced.

You can then use the ideal gas law to find the volume that this gas will occupy
(or if you prefer you can use the fact that one mole of gas at RTP occupies 24000cm^3)
0
reply
Pigster
Badges: 19
Rep:
?
#3
Report 3 years ago
#3
(Original post by 11ashh)
A student hears 5.29 grams of Sr(No3)2
What sound did it make?
0
reply
charco
Badges: 17
Rep:
?
#4
Report 3 years ago
#4
(Original post by Pigster)
What sound did it make?
If this was lead(II) nitrate the answer would be "it decrepitates" ...

.. but I don't believe that strontium nitrate does anything of the kind!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

What are you most likely to do if you don't get the grades you were expecting?

Go through Clearing (189)
38.73%
Take autumn exams (149)
30.53%
Look for a job (17)
3.48%
Consider an apprenticeship (21)
4.3%
Take a year out (84)
17.21%
Something else (let us know in the thread!) (28)
5.74%

Watched Threads

View All
Latest
My Feed