Which of the following possesses an ionic bond?

H2S

LiF

CH4

NH3

What will the pressure of a gas be that contains 4.00 moles at a temperature of 88˚C in a container with a volume of 5.00 Liters?

What do you think will happen to the temperature if you used 75 mL of HCl and 75 mL of NaOH instead of the 10 mL each you used in Experiment 1.

After three half-lives, what fraction of a radioactive sample remains.

The equilibrium constant, Kc, for the following reaction is 56.0 at 278 K. 2CH2Cl2 (g) CH4 (g) + CCl4 (g) When a sufficiently large sample of CH2Cl2 (g) is introduced into an evacuated vessel at 278 K, the equilibrium concentration of CCl4 (g) is

3 sources of background radiation and one source of radiation that is not condisderd background radiation

What do you call all elements that are clearly not metals? ? nonmetals ? metalloids

Which of the slightly soluble salts below will be more soluble in acidic solution than in pure water? a. Mg (OH) 2 b. CaCO3 c. AgCl Mg (OH) 2 d. only Mg (OH) 2, e. CaCO3, and f. AgCl g. CaCO3 only h. both Mg (OH) 2 and CaCO3

What type of chemical bond is formed between two atoms of bromine 1. Metallic 2. hydrogen 3. Ionic 4. covalent

Before oceanography was recognized as its own branch of science it was part of A. Physics B. Chemistry C. Geometry D. Natural science

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.