What is the mass of 1.09 x 10^20 molecules of NO2?

Explain that newton first law,second law and third law of motion?

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

Heat is the total potential energy of a substance that can be transferred. true false