會考化學題MC

因為金剛石 = C / 金剛石含有C

( 我唔知金剛石既英文 .... 我是讀英文的 .... )

C + O2 = CO2 ( 燃燒 )

所以第二句正確

2008-04-11 16:07:38 補充：
第二句正確 , 而且亦解釋左點解會出 CO2

The first statement describes the combustion reaction between diamond and oxygen, you have to think about how CO2 is produced by diamond.
When we express it in terms of a chemical equation, it is like this:
C(diamond) + O2(g) -----> CO2(g)
The second statement states about the composition of diamond which is carbon, rite?
So think about it: If diamond is not a carbon, then it cannot explain how diamond react with oxygen to give carbon dioxide. (think about conservation of mass and energy!!!)
So the answer is A, not B.

因為有碳既成份先會燒完有二氧化碳
所以1可以解釋到2