francesco redi conducted the following experiment.

jars of meat with covers did not have maggots.

jars of meat with no covers did have maggots.

what should have been a control in redi's experiment?
a. the flies
b. the jar covers
c. the amount of meat in each jar
d. the number of maggots on the meat

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Based on the equation and the information in the table, what is the enthalpy of the reaction?