The reaction mixture represented above is at equilibrium at 298 K in the molar concentrations RX equals two and Y equals .5 M and Z equals four what is the value of the equilibrium constant for the reaction at 298K

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )