How many atoms are in 2.3 moles of calcium?

Acar tire has a pressure of 2.38 atm at 15.2 c. if the pressure inside reached 4.08 atm, the tire will explode. how hot would the tire have to get for this to happen? report the temperature in degrees celsius.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?