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How many molecules of aspirin (formula mass 180amu) are in a 0.500g sample?
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Compare and contrast physical changes with chemical changes.
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When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?
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How many molecules of aspirin (formula mass 180amu) are in a 0.500g sample?...
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