Which of the following statements is true about the law of conservation of mass?
A
In a chemical reaction, matter is not created or destroyed, but is conserved.
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B
In a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants.
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C
In a chemical reaction, efforts should be made to preserve rare elements without changing them.
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D
Matter can be created and destroyed but does not change forms.
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Solution
The correct option is A In a chemical reaction, matter is not created or destroyed, but is conserved. In a chemical reaction, matter is not created or destroyed, but is conserved.