Multiple Choice
Given the elementary reaction: a + 2b → ab₂, what is the molecularity of this reaction?
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3. Chemical Reactions
Molecular Formula
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Given the molecular formula C2H6O, how many hydrogen atoms are present in one molecule?
A
8
B
6
C
1
D
2
Verified step by step guidance1
Identify the molecular formula given: C2H6O.
Understand that the subscript numbers in the molecular formula indicate the number of atoms of each element in one molecule.
Look at the subscript for hydrogen (H), which is 6 in this formula.
Recognize that this means there are 6 hydrogen atoms in one molecule of C2H6O.
Therefore, the number of hydrogen atoms present in one molecule is equal to the subscript number 6.
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