Multiple Choice
Which statement best describes the difference between a homogeneous mixture and a heterogeneous mixture?
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1. Intro to General Chemistry
Classification of Matter
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Which of the following is NOT an example of a compound?
A
NaCl
B
O_2
C
CO_2
D
H_2O
Verified step by step guidance1
Understand the definition of a compound: A compound is a substance formed when two or more different elements chemically bond together in fixed proportions.
Examine each option to determine if it fits the definition of a compound:
NaCl consists of sodium (Na) and chlorine (Cl) atoms chemically bonded, so it is a compound.
CO_2 consists of carbon (C) and oxygen (O) atoms chemically bonded, so it is a compound.
H_2O consists of hydrogen (H) and oxygen (O) atoms chemically bonded, so it is a compound.
O_2 consists of only oxygen atoms bonded together; since it contains only one type of element, it is a molecule but not a compound.
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