The_study of the composition of pure substance in the 17th century clearly shows that few elements are components of many substances.
Correct answer: B. Quantitative
- A. Qualitative
- B. Quantitative
- C. Both A & B
- D. Extensive
Explanation
Both qualitative and quantitative analysis were used in the 17th century to study the composition of pure substances. While qualitative analysis helped identify the presence of elements or compounds, quantitative analysis provided information about their quantities.
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About Moles and Avogadro's Number
The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
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