1.Calculate the pH and pOH of the following strong acid solutions: (a) 0.020 M
HCIO4, (b) 1.2x10-9 M HCI.

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Once similarity and one difference between a mixture of elements and a mixture of compounds

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