How many moles of air are there in a 3 l container at 1 atm pressure and 294 k? use pv=nrt

How many atoms are there in 5.70 mol of mg

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space