How many times faster does hydrogen effuse than neon

Which of the following has the greatest mass, in grams? a. 1 atom of gold (Au) b. 1.0 mol mercury (Hg) atoms c. 2.0 mole of chlorine (Cl) atoms d. 25 atoms of mercury (Hg)

You have been given a piece of evidence indicating that plant and animal life is scarce in this environment. Identify this environment and the correct explanation.

Which of the following is a chemical reaction? A. Breaking a glass pane B. Freezing water C. Digestion of food D. Cutting down a tree E. Evaporation of rubbing alcohol

Which of the following is a renewable energy source? A) Trees B) Coal C) Oil D) Natural gas

Describe what you can do to slow down, or stop the continuous negative human treatment of our aquatic biomes.

Which statement best describes a bacterial cell? A It contains more than one cell. B It is a complete organism. C It is part of a larger organism. D It contains different kinds of cells

Lithium (Li) and oxygen (O) are both in period 2. They both have? a. similar properties b. the same number of protons c. two electron shells d. the same number of electrons

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false