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I need help in chem. Please help! Thanks! :)1) A liquid is allowed to evaporate and leaves no residue. Can you determine whether it was an element, a compound or a mixture?2) Which of the following are substances?Which are mixtures?a. ethanol b. motor oilc. vinegard. neon3) If 44 grams of carbon dioxide react completely with 18 grams of water, what is the mass of carbonic acid formed?
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