A 50.00 mL sample of a cough mixture prepared by a pharmacist was found tohave a mass of 46.0g. what is the density (in g/mL) of this mixture. Stated to thecorrect number of significant figures?
Correct answer: B. 0.920
- A. 0.92
- B. 0.920
- C. 0.9200
- D. 1.087
Explanation
The density (D) is calculated using the formula:D= massvolumeIn this case, the mass is 46.0 g and the volume is 50.00 mL.D=46.0 g/50.00 mLD=0.920g/mLTo express the result to the correct number of significant figures, we look at the precision of the given values. The volume is given with four significant figures (50.00 mL), and the mass is given with three significant figures (46.0 g). The result should be reported with three significant figures to maintain consistency.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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