Does nickel form a precipitate when mixed with ammonia or does it form a soluble product?

Nickel forms precipitate when it reacts with ammonia

Explanation:

The reaction between Nickel and ammonia is such that produces a precipitate which dissolves when excess amount is added to it.

At first, the precipitate produces a green precipitate of Ni(OH)₂ when more ammonia is added, the precipitate eases or dissolves, to form a  solution of complex ion of Nickel forms.

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 : )

b. is the answer hoped i