Solve following questions and show all the steps.

1. calculate the ph of a 2.0x10-4 m solution of aniline hydrochoride, c6h5nh3cl.

2. for a solution of 50 mm sodium chloride and 100 mm magnesium acetate, determine the ionic strength and the average activity coefficient for the na+/cl- ions.

3. calculate the mean ionic activity coefficient of a solution that is 10 mm ca(no3)2 (aq) at 298k.

The force will determine the acceleration.

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?