Presbyterian Prelim 2018, q.14 [multiple choice] (1 Viewer)

[jane1820]

can someone please explain this graph? i dont get it, i thought the answer mightve been 600 cm^3 because 3hrs into adding light oxygen absorbed increased to 600 cm^3 (A) but the answer said 1800 cm^3 (D)

 

[Hehehe22]

Ooh this one's confusing. It's 1800 cm^3 because I think it's talking about the rate of release of oxygen. The total oxygen released would be the area under the curve at that point, which is 600 x 3