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NEET 2020
Exam
NEET
Year
2020
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

NEET 2020 · Chemistry · Some Basic Concepts of Chemistry

One mole of carbon atom weighs 12g , the number of atoms in it is...

One mole of carbon atom weighs 12g12g, the number of atoms in it is equal to, (Mass of carbon −12- 12 is \left1 . 9926 \times {10}^{- 23}g\right)

Options

  1. A1.2×10231 . 2 \times {10}^{23}
  2. B6.022×10226 . 022 \times {10}^{22}
  3. C12×102212 \times {10}^{22}
  4. D6.022×10236 . 022 \times {10}^{23}

Correct answer

D. 6.022×10236 . 022 \times {10}^{23}

Step-by-step solution

1 mole of carbon atom (=12  g\mathrm{~g}) 1 mole of a carbon atoms (=6.022 ×\times10^{23}) atoms Hence, mass of (6.022 ×\times10^{23}) atoms of carbon (=12  g\mathrm{~g}) Mass of 1 atom of carbon (=126.022×1023=\frac{12}{6.022 \times 10^{23}}=1.9 ×\times10^{-23}  g\mathrm{~g})
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