MCQM3655 · [1] Volume of gas collected is plotted against time for a reaction. A tangent drawn to the curve at t = 40 s passes through the points (10 s, 12 cm^3) and (60 s, 42 cm^3) . What is the rate of reaction at t = 40 s ? A0.60 cm^3 s^-1B0.70 cm^3 s^-1C1.7 s cm^-3D30 cm^3 s^-1 Next question →