You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 650 grams. The total mass of the set-up is 850 grams. The chemical is ignited by means of a magnifying glass focusing sunlight onto the reactant. After the chemical is completely burned, what is the total mass of the set-up?
Initially the mass is 850 g. It is a sealed system. Nothing gets in or out. What MUST it weigh? Remember the conservation of mass law.
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To find the total mass of the set-up after the chemical is completely burned, we need to consider the conservation of mass.
According to the law of conservation of mass, mass cannot be created or destroyed in a chemical reaction. It is simply rearranged, forming new substances.
In this case, the chemical is being burned, which means it is undergoing a chemical reaction and will be converted into different substances. However, the total mass of the set-up remains constant.
Given that the initial total mass of the set-up is 850 grams (200 grams for the glass container + 650 grams for the chemical), the total mass of the set-up will still be 850 grams after the chemical is burned completely.
So, the total mass of the set-up remains the same at 850 grams.