Explain how you can tell when a change is a chemical change.

What is the volume of a diamond with a mass of 0.25 g?

Which element is a gas at STP? 1) sulfur 2) xenon 3) potassium 4) phosphorus

Two different atoms have four protons each and the same mass. However, one has a positive charge while the other is neutral. Describe what each atomic structure could be, listing the possible number and location of all subatomic particles.

Use diagrams of particles to explain why four atoms of silver sulfide, even when there is an excess of sulfur atoms

Read the given expression. Effective nuclear charge = atomic number - X Which of the following explains the identity of X and its trends across a period? X is the screening constant, and it increases across a period.

Intermolecular forces as a whole are also known as

What is the definition of a common ion as it applies to Le Chatelier's principle? A) an ion that is found in a wide variety of compounds B) an ion that is present in every sample of pure water C) an ion that is found dissolved in most aqueous

Water standing in the open at 33.0°C evaporates because of the escape of some of the surface molecules.

What could explain the changes in the insect's coloration over time A. The population of the incest increased B. The color of the surroundings changed C. A new color of predator was introuduce D. Females started to prefer darker males

Compare and contrast neap tides and spring tides discuss when they occur as well as the alignment of the earth moon sun system