Which of the following is the most electronegative element?

a. He

b. I

c. N

d. O

e. C

Which statement goes against the kinetic theory of gases

Which statement describes the relationship between diagram X and Y?

Which is an example of an electrolytic cell? a battery a fuel cell a rechargeable battery a spontaneous reaction between lithium and copper

Complete the following analogy: coach: football plays as meteorologist: A sediment B writing C Sun D precipitation patterns

Copper sulfate solution was mixed with a galvanized nail and a chemical reaction occurred. During the reaction what substance would you speculate was formed in the reaction?

Which is the balanced chemical equation showing hydrogen peroxide (h2o2) decomposing into hydrogen (h2) and oxygen (o2) ? 1. h2 + o2 → h2o2 2. 2 h2o2 → 2 h2 + o2 3. h2o2 → h2 + o2 4. 2 h2 + o2 → 2 h2o2?

Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions: A. Surroundings get colder and the system decreases in volume. B.

Zircon is a mineral with the empirical formula ZrSiO4. If all the zirconium is 90Zr, all the silicon is 28Si, and all the oxygen is 16O, what mass of oxygen is present in 10. g of zircon?

Which property below is not a general property of metals: A. Ductile C. Malleable B. Poor conductor of heat D. High luster

Calculate the number of particles (atoms or molecules) of the following: 1. How many molecules are there in 24 grams of FeF3? 2. How many molecules are there in 450 grams of Na2SO4? 3. How many grams are there in 2.3 x 1024 atoms of silver?