How many grams of magnesium oxide can be produced when 97.2 g mg react with 88.5 g o2?

unbalanced equation: mg + o2 → mgo

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

For either problem would be greatly appreciated

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.