1 amu is equal to 1.661 x 10^-24g, then 1.0 g will be equal to:
Correct answer: A. 6.022 × 10^23 amu
- A. 6.022 × 10^23 amu
- B. 6.022 × 10^-23 amu
- C. 6.022 × 10^-24 amu
- D. 6.022 × 10^24 amu
Explanation
As 1 a.m.u is equal to 1.66 x 10^-24 g conversely 1 gram is equal to 6.022 x 10^23 amu.For example: 1 carbon atom = 12 amu 1 mole of carbon = 12 g6.022 x 10^23 C atom = 12 g1 C atom / 12 = 1 amu6.022 x 10^23 C atom / 12 = 6.022 x 10^ 23 amu As written above: 6.022 x 10^23 = 12g, we will right like that, 12g/12 = 6.022 x 10^23Hence , 1g = 6.022 x 10^23
This question appeared on the ETEA MDCAT 2012 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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