Multiple Choice
Which of the following compounds has the same empirical formula as its molecular formula?
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3. Chemical Reactions
Empirical Formula
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Which elements are present in the compound calcium carbonate (CaCO_3)?
A
Calcium, sulfur, and oxygen
B
Calcium, carbon, and oxygen
C
Calcium, carbon, and hydrogen
D
Calcium, oxygen, and nitrogen
Verified step by step guidance1
Identify the chemical formula of the compound given: calcium carbonate is written as CaCO_3.
Break down the formula into its constituent elements by looking at each symbol: Ca, C, and O.
Recognize that 'Ca' stands for calcium, 'C' stands for carbon, and 'O' stands for oxygen.
Note that there is no sulfur (S), hydrogen (H), or nitrogen (N) in the formula CaCO_3.
Conclude that the elements present in calcium carbonate are calcium, carbon, and oxygen.
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