Exactly 4.0g of sulfur is burnt in a fume extraction cupboard. The sulfur is ignited in an excess of oxygen: S(s) + O2(g) ➔ SO2 (g) a. What volume of gas will form in dm3 at rtp?

b. What volume of oxygen will be used up?

c. Why is the investigation carried out in a fume extraction cupboard?

65uuyhjghj8ykitdyidii

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

its first and third is your answer i did the qustion the fourth isnt right