There are almost 200 million people alive in Pakistan. If you were to distribute 100 to each Pakistani in the form of 5 Rupee coins, how many moles of coins are you required to have?
Correct answer: A. 6.67 x 10^-14
- A. 6.67 x 10^-14
- B. 1.5 x 10^-14
- C. 6.67 x 10^14
- D. 1.5 x 10^14
Explanation
As we have to distribute 5 rupee coins to 100 people so,100/5 =20 coinsNow multiply these coins by the total population alive in Pakistan200000000 or 200 million x 20 = 4000 x 106As we know 1 mole = 6.02 x1023 molecules so,4000 x 106 / 6.02 x1023 = 6.67 x10-14.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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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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