1. a plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is composed of plant pigments such as chlorophyll a and b, carotene, and xanthophylls. write a brief explanation about why a plant extract is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated.
2. a scientist has a sample of a substance that could be magnesium, sodium, stainless steel, or copper. name two properties the scientist could use to identify the substance, and explain why the scientist could use each property to identify the substance.
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Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing
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Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.
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How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy
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1. a plant extract can be obtained with organic solvents such as acetone or ethyl alcohol, and is co...
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