How many valence electrons are there in krypton? how many total electrons? explain how you know.

Consider an atom of oxygen in which the nucleus contains 8 protons and 8 neutrons. If it is doubly ionized, what is the charge of the oxygen ion and how many electrons remain in the ion?

If sample A melts at 0 degrees Celsius, what temperature will sample C melt at? A. 100 degrees B. 25 degrees C. 0 degrees D. 32 degrees

On a shade-grown coffee plantation, smaller coffee plants grow in the shade of forest trees. The practice produces fewer coffee beans than growing coffee in full sun, but it is more sustainable because it provides habitat for forest birds.

a student determined that 8.2 milligrams of oxygen is dissolved in a 1000 gram sample of water at 15 degrees Celsius and 1 atm what type of solution is this sample

Which type of heat transfer involves the movement of warmed material? A. radiation B. conduction C. convection

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.