Sue poured some sand into a pan. Which other item should sue add to the pan in order to model stream erosion?

A. An electric fan

B. A packet of grass seeds

C. A block of ice

D. A glass of water

How many valence electrons would an element with atomic number 113 have?

Which salt is produced when copper oxide reacts with hydrochloric acid? a. Chloride oxide c. Copper chloride b. Copper oxide d. Hydrochloride

A balanced chemical equation shows the proportions of reactants and products necessary for

Which of the following causes an increase in the atomic number? A) alpha emission B) beta emission C) gamma emission D) none of the above

How does natural selection "drive" evolution?

Calculate the number of ATPs generated by the complete metabolic oxidation of tripalmitin (tripalmitoylglycerol). Hydrolysis of the triacylglycerol occurs at the cell surface.

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas? It would increase. It would be halved. It would stay the same.

Which of the following would require the largest volume of 0.100 M sodium hydroxide solution for neutralization?: (A) 20.0 mL of 0.0500 M nitric acid (B) 15.0 mL of 0.0500 M hydrobromic acid (C) 5.0 mL of 0.0100 M sulfuric acid (D) 10.0 mL of 0.

Approximately what volume do 3.0 moles of kr gas occupy at stp? 80.0 40.0 l none of the above 20.0

What is the correct formula when Aluminum and Nitrogen are combined? a. Al3N b. AlN c. AlN3 d. Al2N