To design a simple investigation to prove that mass is conserved during a chemical reaction, the student should choose an option that allows for a comparison of mass before and after the reaction.

Option A, comparing the mass of a candle before and after burning it, would provide evidence of mass conservation. During the burning process, the candle undergoes a chemical reaction, converting the wax into gases and releasing heat and light. By measuring the mass of the candle before and after burning, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Option B, comparing the mass of a piece of paper before and after tearing it, does not involve a chemical reaction. Tearing a piece of paper only changes its physical state, but the total mass remains the same. Therefore, this option does not provide evidence for the conservation of mass during a chemical reaction.

Option C, comparing the mass of a piece of copper before and after melting it, also does not involve a chemical reaction. Melting copper only changes its physical state from solid to liquid, but the total mass remains constant. Hence, this option does not prove the conservation of mass during a chemical reaction.

Option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water, would provide evidence for the conservation of mass. When the Alka-Seltzer tablet reacts with water, it undergoes a chemical reaction, releasing gas bubbles. By measuring the mass of the cup before and after the reaction, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Therefore, the investigation that will provide the evidence needed to prove the claim that mass is always conserved in a chemical reaction is option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water.

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To design a simple investigation to prove that mass is conserved during a chemical reaction, the student should choose an option that allows for a comparison of mass before and after the reaction.

Option A, comparing the mass of a candle before and after burning it, would provide evidence of mass conservation. During the burning process, the candle undergoes a chemical reaction, converting the wax into gases and releasing heat and light. By measuring the mass of the candle before and after burning, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Option B, comparing the mass of a piece of paper before and after tearing it, does not involve a chemical reaction. Tearing a piece of paper only changes its physical state, but the total mass remains the same. Therefore, this option does not provide evidence for the conservation of mass during a chemical reaction.

Option C, comparing the mass of a piece of copper before and after melting it, also does not involve a chemical reaction. Melting copper only changes its physical state from solid to liquid, but the total mass remains constant. Hence, this option does not prove the conservation of mass during a chemical reaction.

Option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water, would provide evidence for the conservation of mass. When the Alka-Seltzer tablet reacts with water, it undergoes a chemical reaction, releasing gas bubbles. By measuring the mass of the cup before and after the reaction, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Therefore, the investigation that will provide the evidence needed to prove the claim that mass is always conserved in a chemical reaction is option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water.

Knowee AI · Accepted Answer

To design a simple investigation to prove that mass is conserved during a chemical reaction, the student should choose an option that allows for a comparison of mass before and after the reaction.

Option A, comparing the mass of a candle before and after burning it, would provide evidence of mass conservation. During the burning process, the candle undergoes a chemical reaction, converting the wax into gases and releasing heat and light. By measuring the mass of the candle before and after burning, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Option B, comparing the mass of a piece of paper before and after tearing it, does not involve a chemical reaction. Tearing a piece of paper only changes its physical state, but the total mass remains the same. Therefore, this option does not provide evidence for the conservation of mass during a chemical reaction.

Option C, comparing the mass of a piece of copper before and after melting it, also does not involve a chemical reaction. Melting copper only changes its physical state from solid to liquid, but the total mass remains constant. Hence, this option does not prove the conservation of mass during a chemical reaction.

Option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water, would provide evidence for the conservation of mass. When the Alka-Seltzer tablet reacts with water, it undergoes a chemical reaction, releasing gas bubbles. By measuring the mass of the cup before and after the reaction, the student can determine if there is any change in mass, thus proving or disproving the conservation of mass.

Therefore, the investigation that will provide the evidence needed to prove the claim that mass is always conserved in a chemical reaction is option D, comparing the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water.

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