Two basic properties of the solid phase are

Which of the following is a process with a negative ΔS? a) CaCO3 (s) → CaO (s) + CO2 (g) b) CO2 (s) → CO2 (g) c) None of the choices are correct because ΔS cannot be negative. d) dissolving sugar in water e) H2O (l) → H2 (s)

Why are gas bubbles not always a sign of a chemical change?

4 A substance has molecules that are loosely bound, allowing them to flow freely around each other. The substance will take the shape of its container. This substance must be a -

The heat vaporization of water is 40.66 kj/mol ...? The heat vaporization of water is 40.66 kj/mol. How much heat is absorbed when 3.45g of water boils at atmospheric pressure?

1. The deepest that scientists have been able to drill is below the surface. A 100 kilometers B 6,000 kilometers C 3.8 kilometers D 12 kilometers

Penny bought a club moss plant for her water garden. She needs to know how tall the plant will grow so she knows how much space it will need.

Which of the following is not a producer? Mushroom Tulip Grass Pine Tree

Phosphorus forms a number of oxohalides, x3po, in which x may be a f, cl, or br atom. the most common of these, phosphoryl chloride, is obtained as follows:

Which statement is true about the speed of light waves in a medium? a. Depends on the temperature of the light wave b. Decreases with a decrease in density of medium c. Decreases with an increase in density of medium d.

What's a certain indicator that a molecule is polar? the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical