Which of the following lenses is a converging lens?
a. plano-concave lens
b. convexo-concave lens
c. spherical-convex lens
d. double-convex lens

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

Do polar molecules have ionic bonds?

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).