How many grams are there in 4.50 moles of Na2SO4? What is the volume of 13.20 grams of N2 at STP?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which statement best describes the function of enzymes?

The fact that the total amount of energy in a system remains constant is a(n)