19 OAB is a triangle. OA = a
ch OB = b
The point C lies on OA such that OC : CA = 1:2
The point D lies on OB such that OD: DB = 1:2
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Using a vector method, prove that ABDC is a trapezium,​

How does the motion of particles in a gas change as the gas cools

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?