Lab Questions 1. Calculate the mass percentage of water in the hydrate. Show the calculations.   2. Knowing that magnesium sulfate is heptahydrate, what is the % error on the mass percentage of water? Show all calculations.   3. Which experimental steps can a student perform to be sure that all the water has been removed from the hydrate?

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Q: What are three errors that could cause one of your mass percentages to be too high?

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Q: 4. A hydrate is determined to be 45.43% water and 54.57% CoCl,. Find the chemical formula and name…

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Q: In 6.9 g of aluminum, there are ______ x 1023 aluminum atoms present

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A: The diagram is of Hydrogen molecule.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.