What element is an atom that has 7 protons 8 neutrons and 6 electrons?

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?

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 calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced