Which of the following is a molecule but

NOT an element?

A. O2

B. CO2

C. N2

D. H2

Describe how weathering, erosion, and deposition act together to wear down and build up earths surface

Which factor is defined as the average kinetic energy of a substance? A. the mass of the substance B. the volume of the substance C. the pressure of the substance D. the temperature of the substance

Consider that cuo (s) + h2so4 (aq) reacts to give cuso4 (aq) and cuo (s) + k2so4does not give a product.

Calculate the number of moles in 3.99x10^24 molecules of chalk (calcium carbonate).

An observation which is descriptive is considered: quantitative qualitative

How many hydrogen atoms are in 2.80 mol of ammonium sulfide?

What is a large oval structure that directs all of the cells activities?

HBr + H₂SO₄ SO₂ + Br₂ + H₂O What is the oxidation number of the oxidizing agent? What is the oxidation number of the reducing agent?

How do find the volume of 60.0g of ether if the density is. 70g/mL?

A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach.