4moles of Carbon dioxide(CO2) have _____molecules.
Correct answer: D. 24.08 x 10^23
- A. 6.02 x 10^23
- B. 12.04 x 10^25
- C. 18.06 x 10^23
- D. 24.08 x 10^23
Explanation
One mole contains 6.022 x 10^23 molecules, so 4 moles contain 4 x 6.022 x 10^23 = 24.088 x 10^23 molecules, which is approximately 24.08 x 10^23 molecules. The likely mistake is choosing 6.02 x 10^23, which is the number of molecules in only 1 mole, or 12.04 x 10^25, which has an incorrect power of ten.
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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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