Is the supply of copper-rich ores greater or lesser than iron-rich ores?

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

What is the mass of naoh that would have to be added to 500 ml of a solution of 0.20 m acetic acid in order to achieve a ph of 5.0?

Consider this reaction taking place in a closed 2 liter container: 2so2(g) + o2(g) → 2so3(g) if the volume of the container is decreased to 1 liter, what will happen to the equilibrium of the reaction? it will shift left. it will shift right. it will remain constant it will decrease by half