I'm stuck between 1, 4 and 5.
1) Since it's water there is going to be waterborne diseases, but fixing the pollution in the town seems to be the best option
4.) Enforcing water laws can lower the chance of having waterborne diseases that might happen.
5) Related to #1, it'll help keep the sickness down if it was monitored and reported to local hospitals
<span>This problem is solved by the law of effusion, which states that the rate of effusion is ~ 1/sqrt(molecular weight). Calculate the molecular weights of the different gases:
HBr = 80.91 g/mol
NO2 = 46.0055 g/mol
C2H6 = 30.07 g/mol
Thus, the approximate relative rates are HBr ~ 0.112, NO2 = 0.1474 and C2H6 = 0.1824.
Answer: C2H6 effuses fastest.</span>
acupuncture and acupressure both go into farthing healing I believe