Chlorobenzene which is insoluble in watersteam distils at 91degree centrigend under a. t.m of 101300Pa. A sample of steam distillate contains 23.7g of benzene per every 10g of water .Find the vapour pressure of water and chlorobenzene at 91 degree centrigend.

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123