When testing the freezing point of water, why is it that
youshould keep the thermometer from touching the bottom or the
sidesof the beaker.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Ineed ! i have no clue how to do this problem.

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