What is the density of object with volume of 20 ml and a mass of 5 grams?

What is the mass of 4 molecules of co2

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

All cells are made of four types of acids, lipids, proteins, and carbohydrates.