What is one thing you commit to doing in your classes tomorrow to show you are engaged?

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

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt