EARTH SCIENCE
MAGNETISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gas has mass and when it leaves the substance is lighter
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Gas weighs more
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Gass weighs less
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the reactants make it weigh less
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Detailed explanation-1: -Explanation: According to the Law of Conservation of Mass, mass cannot be created or destroyed. Therefore in any chemical reaction the mass of the products must equal the mass of the reactants.
Detailed explanation-2: -This is because the new substances created are composed of atoms that were present in the reactants. The atoms from the reactants come apart, rearrange and re-bond in a different arrangement to form the products. No new atoms have entered or left the system so the mass is conserved.
Detailed explanation-3: -The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Detailed explanation-4: -Q. Which best explains why the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction? A physical change occurred.