If the pressure is held constant and a balloon decreases in volume what is the sign of work?

Which is of these nonmetals are more reactive - bromine or krypton? Explain.

How many liters are in 4.5 moles of ne gas at stp

Given what you know about acids and bases, which of the following descriptions is the most accurate? A. We can tell a substance is acidic if it had a high pH B. A basic substance has a low pH C.

A glass of water contains 1.2 x 1024 molecules of water. An additional 4.0 moles of water are poured into the glass. How many moles of water are in the glass?

The diagram below represents a sodium atom bonding to a chlorine atom to form sodium chlorine. Which statement is supported by this diagram? (1) Sodium chlorine is an element. (2) Sodium chlorine is a mixture. (3) Sodium chlorine is a compound.

What is the purpose of a cell membrane

More polar solvents (eluents) move molecules more rapidly than less polar solvents. If you used a 1:1 hexanes:methanol mixture as solvent, would you expect the products to elute faster or slower?

C12 has 6 protons. how many neutrons does c13 have? a. 6 b. 7 c. 13 d. 19

Imagine you are at a local water park on a hot summer day and your feet begin to get hot from the cement. Looking ahead, you notice that there are two paths you can take to your favorite waterslide.

Determine the pH of a 0.350 M solution of HA. The pkb of A - is 12.830.