What mass of Ca(OH), must be dissolved in 0.504 L of a solution to make a 0.56 M solution? 0.28 g
21 g
1.1 g
0.90 g

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

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

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm