What is wrong with the following depiction of a chemical reaction?
A) These boxes contain only molecules but no atoms.
B) One box contains more molecules than the other.
C) One box contains more atoms than the other.
D) All of the above.
Answer: C
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Natural rubber is made from the polymer _________.
Fill in the blank(s) with the appropriate word(s).
Earth's rotation is being gradually slowed by the Moon's gravity.
Answer the following statement true (T) or false (F)
In the Ptolemaic model of the solar system, Venus should exhibit which of the following phases?
A) crescent B) new C) full D) A and B E) B and C
A gas expends to three times its original volume, and in the process no energy is transferred to the gas. What happens to the internal energy of this gas? a. It increases
b. It decreases. c. It remains constant. d. Impossible to know without more information