A fossilized animal that was killed by a volcanic eruption has 6.25 percent of its original amount of carbon-14 remaining; this radioisotope has a half-life of 5730 years. How long ago did the volcano erupt?

Is this statement true or false? Atoms in liquids vibrate too much to stay in a fixed position.

This group of elements with a few valence electrons that conducts heat and electricity

Phenolphthalein would not be an appropriate indicator to use to determine the Ka1 of phosphoric acid Why not? what indicator would be appropriate?

Which of the following is the heaviest? Electron, proton, neutron, or nucleus. Neutral lithium has 3 protons. During a chemical reaction, 1 electron is removed.

Consider hitting a golf ball with a golf club. If we call the force applied to the ball by the club the action force, identify the reaction force. A. the centrifugal force in the swing B. the force applied to the club by the hands C.

1.4 Explain why it is important to support individuals to challenge information about services that may present a barrier to participation

Which describes energy changes during nuclear fission? A very large amount of energy is produced from a tremendous mass. EEUU A very large amount of energy is produced from a very small mass. G .

A 0.75mol calcium carbonate (CaCO3) pellet has what mass?

The pH of the acid in the stomach is 2. When a person has heartburn, the acid in their stomach is coming up the esophagus (lower throat) and burning the lining of the esophagus. Why would a person take an Alka Seltzer tablet for heartburn?

Calculate the photon energy (in joules) for the light emitted from the hydrogen atom if ninitial = 4 and nfinal = 2.