oook so..
- If CO2 amd H2O are formed when compound 'x' is burned, which two elements must be present in 'x'?
andd
- Some coals and oils contain sulphur impurities. Which harmful gas is formed when these fuels are burned?
Pleasee help guys, would be much appreciated x x x
2007-01-29 07:05:27 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The answers look fair (don't know why some one went mad with the thumbs down) but here's a link to BBC bitesize which has really good chemistry info. Click on 'Oil and oil products' then 'combustion' and it will tel you about sulphur dioxide and acid rain. Click revise and you get the info up. It's logical that the compound must contain carbon and hydrogen because they must come from somewhere. Always remember that there needs to be a source for every element listed. Check out bitesize though, I love it.
http://www.bbc.co.uk/schools/gcsebitesize/chemistry/
2007-01-29 07:34:02 · answer #1 · answered by ammie 4 · 1⤊ 0⤋
If CO2 amd H2O are formed when compound 'x' is burned, which two elements must be present in 'x'? .. ANS: Carbon and Hydrogen....
Some coals and oils contain sulphur impurities. Which harmful gas is formed when these fuels are burned?.. ANS: SO2 and SO3
2007-02-02 12:35:10 · answer #2 · answered by uv 2 · 0⤊ 0⤋
Hi
I agree with many of the others:
If carbon dioxide CO(2) and water H(2)O is formed when a compound is burnt then does it stand to reason that carbon C and hydrogen H are present in the original compound.
when sulphur is burnt in air sulphur dioxide SO(2) is produced
2007-01-29 22:23:28 · answer #3 · answered by babe_boo 2 · 0⤊ 0⤋
When something is burned oxygen gets added to it, so in order to get carbon dioxide you have to start with carbon and to get water you must have hydrogen present. So therefore compund x is a hydrocarbon - contains both carbon and hydrogen.
Similarly when you burn sulphur it binds to oxygen becoming sulphur dioxide, SO2.
Whenever answering questions about combustion just remember combustion is the addition of oxygen. The oxygen comes from the air, but don't forget to include it in any equations you write.
2007-01-30 05:54:48 · answer #4 · answered by Ellie 4 · 0⤊ 0⤋
The two elements must be carbon and hydrogen and the compound itself must be an organic one.
When plenty of air is available sulphur will burn to form a gas called sulphur dioxide.
Other gases which contain sulphur are sulphur trioxide and hydrogen sulphide which is very smelly like rotten eggs !!
2007-01-29 17:57:28 · answer #5 · answered by Anonymous · 0⤊ 1⤋
1. The compound must contain carbon and hydrogen
2. Sulphur dioxide (SO2) is produced
2007-01-30 14:02:26 · answer #6 · answered by Elaine 2 · 0⤊ 0⤋
1. You need 3 elements ... Carbon, Hydrogen (and Oxygen from air).
e.g. Methane CH4 will burn in sufficient oxygen to give Carbon Dioxide (CO2) and Water vapour (H2O).
CH4 + 2O2 = CO2 + 2H2O
2. When Sulphur burns it produces Sulphur Dioxide.
(S + O2 = SO2)
2007-01-29 18:04:56 · answer #7 · answered by Norrie 7 · 0⤊ 0⤋
1. Carbon and Hydrogen
2. Sulphur Dioxide
2007-01-29 15:16:40 · answer #8 · answered by kangaroo 4 · 1⤊ 1⤋
Carbon & Hydrogen
Sulphur Dioxide
2007-01-30 16:29:43 · answer #9 · answered by lenpol7 7 · 0⤊ 0⤋
Carbon and Hydrogen (oxygen is obtained from the air)
SO2 (S+O2 ----> SO2)
For no1, does the question mention where the compound is burnt?
2007-01-29 15:10:53 · answer #10 · answered by SS4 7 · 1⤊ 1⤋