QuestionJuly 8, 2025

18) Which component of the air is an element? A) H_(2)O B) NO_(2) C) O_(2) D) CO_(2) C) O2 D) CO2 B) NO2 A) H2O

18) Which component of the air is an element? A) H_(2)O B) NO_(2) C) O_(2) D) CO_(2) C) O2 D) CO2 B) NO2 A) H2O
18) Which component of the air is an element?
A) H_(2)O
B) NO_(2)
C) O_(2)
D) CO_(2)
C) O2
D) CO2
B) NO2
A) H2O

Solution
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Answer

C) O_2 Explanation 1. Identify elements An element is a substance consisting of only one type of atom. Among the options, O_2 is composed solely of oxygen atoms.

Explanation

1. Identify elements<br /> An element is a substance consisting of only one type of atom. Among the options, $O_2$ is composed solely of oxygen atoms.
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