What can you say about the amount of electrons found in the second ring

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

What is the relationship of air masses and the temperature of oceans?