Calculate For the reaction described in question 30 the concen -tration of CH 3 CHO is found to increase from 0.0300 mol /L . to 0.0500 mol /L in 42.5 seconds . Express the average rate the reac -tion in 0.0300mol / L 0.0500mol / L mol CH3CHO duced/L* s.

the average speed is 24.57 km/hr

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.