Answer:
3.Rate law=k[BH3]^1×[NH3]^1
Step-by-step explanation:
first and 2nd trial comparison
when NH3 is halved, the rate is halved and therefore the exponent is 1
2nd and third trial comparison
0.125 to 0.100
which will effect the initial rate by ×100/125
the initial rate would be 0.0852×200/250
will be 0.0682
therefore the exponent for BF is 1