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Question

Dry ice is chemically _______.
  1. CO2
  2. H2O
  3. O2
  4. Cl2

A
H2O
B
O2
C
CO2
D
Cl2
Solution
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Dry ice, sometimes referred to as "cardice" (chiefly by British chemists), is the solid form of carbon dioxide. It is used primarily as a cooling agent.

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