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The atmosphere is the air surrounding Earth and is made up of 78% , 21% oxygen, and other trace gases. Please help this is urgent!!

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Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

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Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

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Ineed pls urgent 1-20 in order and fully detail step my step.

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If you are told to get 100 ml of stock solution to use to prepare smaller size sample for an experiment, which piece of glassware would you use?

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