Sulfur trioxide as follows:
2 SO21g2 + O21g2 ¡ 2 SO31g2
At a certain temperature and pressure, 50 L of SO2 reacts with
25 L of O2. If all the SO2 and O2 are consumed, what vol-
ume of SO3, at the same temperature and pressure, will be
produced?

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