Chemistry 9th Edition - Steven S. Zumdahl, Susan A. Zumdahl ...

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liquid) or quantitative (water boils at 100C; a certain chemistry book weighs 2 kg). A qualitative observation does not involve a number. A quantitative observation. ( called a measurement) involves both a number and a unit. 2. Formulating hypotheses. A hypothesis is a possible explanation for an observation. 3. Performing ...

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