Multiple Choice
Which of these pairings of elements and their chemical properties is incorrect?
1. Intro to General Chemistry
Chemical Properties
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What occurs in a chemical reaction?
A
The total mass of the reactants is lost.
B
Atoms are destroyed and new atoms are created.
C
Energy is always absorbed.
D
Atoms are rearranged to form new substances.
Verified step by step guidance1
In a chemical reaction, the law of conservation of mass states that the total mass of the reactants equals the total mass of the products. This means mass is neither lost nor gained.
Atoms are not destroyed or created in a chemical reaction. Instead, they are rearranged to form new substances. This is consistent with the law of conservation of matter.
Energy can either be absorbed or released during a chemical reaction, depending on whether the reaction is endothermic or exothermic. It is not always absorbed.
The correct understanding of a chemical reaction is that atoms are rearranged to form new substances, which involves breaking old bonds and forming new ones.
This rearrangement of atoms results in the formation of products with different properties from the reactants, while the total number of each type of atom remains constant.
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