PL HELP The chocolate in your favorite candy bar has the chemical formula: C7H8N4O2. What elements are present in this formula? How many atoms of each element are in this molecule? Using some of the trends that you described in question 2, what patterns do you notice between these elements on the periodic table?

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