Which of the following does not involve the movement of molecules from an area of greater concentration to an area of lower concentration - diffusion - filtration - facilitated diffusion - osmosis - simple diffusion

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon

How many liters of water can be produced from 5.0liters of butane gas at stp, assuming excess oxygen? c4h10(g) + 02(g) → co2 (e) + h2o (g)