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ng 2 ounces (60 ml) water to the powder to . Accuratelyweigh the snow. Place the snow in an open container and allow thewater to evaporate. This may take several days depending on thehumidity. When all of the water has completely evaporated,accurately weigh the remaining powder. If the law of conservationof mass is correct, you should have recovered the same amountof Instant Snow powder you started with at the beginningof the experiment. This proves that the reaction that took placewas a physical reaction and not a chemical reaction since the neveractually changed.
