Which of the following has the same number of molecules as there are in 11g of CO2?
Correct answer: B. 4.5g of H2O
- A. 4g of O2
- B. 4.5g of H2O
- C. 4g of Cl2
- D. 1 moles of NaCl
Explanation
First, we need to calculate the number of moles of CO2 in 11g of CO2 So, 44g of CO2 is 1 mole, then 11g of CO2 is how many moles? Solution: using conversion factor: 11g x 1/ 44g = ¼ moles or 0.25 moles.
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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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