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A 1- flask is filled with 1.45 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.30 .What is the partial pressure of argon, , in the flask?
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How many grams of nitrogen are found in 50.0 grams of potassium nitrate?
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What are the symbol and name of the element whose average atoms have a mass very nearly half the mass of an average silicon atom?
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