What is a possible benefit of having the food and drug administration (fda) test a new drug instead of having the drug manufacturer test it?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

State one important difference between a physical change and a chemical change?

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules