객관식
Which of the following substances has the highest boiling point?
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1. Intro to General Chemistry
Physical Properties
객관식
Which statement best describes how the physical properties of rust (Fe2O3) compare with those of iron (Fe) and oxygen (O2)?
A
Rust is a silvery-gray metal like iron, but oxygen is a reddish-brown solid.
B
Rust and iron have identical physical properties because they both contain iron atoms.
C
Rust is a colorless gas, similar to oxygen, but iron is a reddish-brown solid.
D
Rust is a reddish-brown solid, while iron is a silvery-gray metal and oxygen is a colorless gas.
검증된 단계별 안내1
Identify the substances involved: iron (Fe), oxygen (O\_2), and rust (Fe\_2O\_3).
Recall the physical state and appearance of each substance at room temperature: iron is a silvery-gray metal (solid), oxygen is a colorless gas, and rust is a reddish-brown solid.
Understand that rust (Fe\_2O\_3) is a compound formed by the chemical combination of iron and oxygen, which changes the physical properties compared to the individual elements.
Compare the physical properties: rust differs from iron in color and texture, and differs from oxygen in physical state and color.
Conclude that the best description is that rust is a reddish-brown solid, iron is a silvery-gray metal, and oxygen is a colorless gas.
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