7 What might cause a theory to change over time?
A
New laws passed by the government
B
New but untestable Ideas
C Changes in public opinion
D
The discovery of new evidence

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .