Multiple Choice
How many carbon atoms are present in one molecule of CCl_4?
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3. Chemical Reactions
Molecular Formula
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How many hydrogen atoms are present in a molecule of acetic acid (CH3COOH)?
A
3
B
6
C
2
D
4
Verified step by step guidance1
Identify the molecular formula of acetic acid, which is CH\3COOH.
Break down the formula to count the hydrogen atoms: CH\3 means there are 3 hydrogen atoms attached to the first carbon.
COOH contains an -OH group, which contributes 1 hydrogen atom.
Add the hydrogen atoms from both parts: 3 (from CH\3) + 1 (from OH) = 4 hydrogen atoms in total.
Conclude that a molecule of acetic acid contains 4 hydrogen atoms.
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