This reading explained that masses seem to have no mass since their mass is spread out over such a large volume

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This reading explained that masses seem to have no mass since their mass is spread out over such a large volume

a.

The law of conservation of masses states that the mass of the reactants is equal to the mass of the products formed in any chemical reaction.

c.

Law of conservation of masses is accurately represented by a balanced chemical equation and not a skeleton equation. A balanced chemical equation accurately shows the validity of the law of conservation of masses as shown in part b of this question.

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a) no, the change in mass is noticed in the evaporated water and combusted meat that enters the atmosphere

b) No, the tree uses the mass of water and nutrients to grow itself

c) No, the heat causes the copper to react with the oxygen in the atmosphere

d) no, over night your body releases water vapor through your breath, dehydrating you

a) no, the change in mass is noticed in the evaporated water and combusted meat that enters the atmosphere

The mass of the roof will increase as it turns green. This is because copper will react with atmospheric substances to form some copper compound. This is in accordance with the law of conservation of masses because the mass increases because copper in the presence of atmospheric air, oxidizes to copper compounds which are heavier in mass than copper atom.

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For this experiment, a mass balance, flasks and a gas syringe of of known masses are needed. First a certain mass of baking soda is added in a flask (of known mass). This is placed on the mass balance and its top is sealed with a cork, having 2 holes. In one of the holes a gas syringe of (known mass) is attached while in the other, a burette containing known mass of vinegar is inserted. Vinegar is added to baking soda, some reaction takes place and a gas is produced. The contents of both the flask and the syringe are weighed to determine their masses. The sum of these two masses should be equal to the sum of the mass of baking soda and vinegar taken at the start of the experiment.

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b.

The assumption taken here is that the law of conservation of masses holds true and therefore the total mass of products and reactants is equal. In reality this is not always that case and the mass of products is always less than the mass of reactants because of some losses that are inevitable to occur. For example in the case given here, some carbon dioxide gas produced might have escaped the apparatus.

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If the atoms themselves are conserved through the reaction, the initial mass of those atoms will equal the final mass of those atoms since the mass of an atom cannot change through a simple chemical reaction