A100 ml sample of propane gas is collected by water displacement. if the temperature of the water is 19 ? c and the barometric pressure reads 758 mm hg, what is the pressure of the propane in atm?

If two identical atoms are bonded,what kind of molecule is formed

How do you determine the percent yield of a chemical reaction

Malik formed a hypothesis that an increase in atmospheric oxygen levels by 10% would cause red-legged grasshoppers to grow larger than normal. suppose that malik performs an experiment to test his hypothesis. which of these actions would represent a scientific mistake in his experiment? a. he experiments on live grasshoppers instead of preserved ones. b. he focuses on red-legged grasshoppers instead of all kinds of grasshoppers. c. he varies the nitrogen and carbon dioxide levels in the air from one trial to the next. d. he conducts the experiment in a controlled lab setting with a lab partner. e. he measures the mass and length of his specimens at the start of each trial.