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The freezing point of pure water is 0.0C. How many grams of ethylene glycol (CHO) must be mixed in 100.0 g of water to lower

The freezing point of pure water is 0.0C. How many grams of ethylene glycol (CHO) must be mixed in 100.0 g of water to lower the freezing point of the solution to -9.1C?

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