Multiple Choice
Which of the following correctly describes the physical state of each halogen at room temperature (approximately 25°C)?
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2. Atoms & Elements
Periodic Table: Phases
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In a chemical equation, what does it mean when a substance is labeled with (s)?
A
The substance is in the solid phase.
B
The substance is in the gaseous phase.
C
The substance is in the aqueous phase.
D
The substance is soluble in water.
Verified step by step guidance1
Understand that in chemical equations, substances are often labeled with phase symbols to indicate their physical state during the reaction.
Recognize the common phase symbols: (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous (dissolved in water).
Identify that the symbol (s) specifically denotes that the substance is in the solid phase, meaning it is a solid under the conditions of the reaction.
Note that (g) indicates a gaseous phase, (aq) means the substance is dissolved in water (aqueous), and solubility is not directly indicated by these symbols but rather by additional information.
Therefore, when you see a substance labeled with (s) in a chemical equation, it means the substance is present as a solid.
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