Multiple Choice
Which of the following halides could be successfully used to form a Grignard reagent? A. CH3Br B. CCl4 C. C6H5I D. HCl
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3. Chemical Reactions
Functional Groups in Chemistry
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Which elements are present in the molecular structure of propane?
A
Carbon and oxygen
B
Hydrogen and nitrogen
C
Carbon and hydrogen
D
Carbon, hydrogen, and sulfur
Verified step by step guidance1
Recall the molecular formula of propane, which is C3H8. This indicates the types and numbers of atoms present in one molecule of propane.
Identify the elements represented by the symbols in the formula: 'C' stands for carbon and 'H' stands for hydrogen.
Note that there are no other element symbols such as 'O' for oxygen, 'N' for nitrogen, or 'S' for sulfur in the formula of propane.
Understand that propane is a hydrocarbon, meaning it contains only carbon and hydrogen atoms bonded together.
Conclude that the elements present in the molecular structure of propane are carbon and hydrogen.
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