Antoine Lavoisier is known for which of the following? (Select all that apply)

a. the theory of general relativity

b. the theory of natural selection

c. the law of conservation of mass

d. studying gravity

e. discovering oxygen

Which of the units is NOT a measure of pressure?

Name of the acid H2SO4

Why is the covalent bond between two atoms of the same element a nonpolar bond?

What is the lewis dot structure of aluminum sulphate?

What is the molality of a solution containing 10.0 g of Na2SO4 dissolved in 1000.0 g of water?

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?