How do you calculate the volume of 30.0% (w/w) H2O2 needed to prepare 25.0 mL of a 3.6 M hydrogen peroxide solution?

Compare and contrast physical changes with chemical changes.

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

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