A student fills a paper cup with water and puts in a freezer overnight. When she takes the cup out the next day, she notices that the sides of the cup are pushed out. Why did this happen?

Why is atmospheric pressure generally lower beneath a mass of warm air than beneath a mass of cold air?

The o-to-o-to-o bond angle in an ozone (o3) molecule is not exactly 120° because

Which list includes elements with the most similar chemical properties? 1. Br, Ga, Hg 2. Cr, Pb, Xe 3. O, S, Se 4. N, O, F

How are P waves different from S waves?

Which of the following would you predict to have a positive value for º? AgCl (s) → Ag + (aq) + Cl - (aq) H2O (g) → H2O (l) 2 Na (s) + Cl2 (g) → 2NaCl (s) Br2 (l) → Br2 (s)

How many particles are in 1 mole of a substance?

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?