Which of the following is not a correct formula unit?

MgO

Ca2N3

KCl

Li3N

Based on how heat is transferred, why does opening a window cool down a room?

If water were a nonpolar molecule, how would its properties be different?

Which statement describes a chemical reaction? a. reactants form products when atoms change state. b. products form reactants when atoms change state. c. reactants form products when atoms are rearranged. d.

A model of an atom is shown below. Which element is represented by this model of an atom? Boron, Carbon, Neon, or Sodium?

Which of the following is most likely to be the best conductor of electricity? iodine neon silicon lead

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?

Read the two questions. Question 1: Should acid precipitation be a concern for the new age environmentalist? Question 2: Does acid precipitation in forests affect the reproduction rate in birds?

How is excitation in spectroscopy brought about

What is the best reason for a student to remove a dangling bracelet when heating test tubes of acidic solutions in a hot-water bath in a chemistry lab?