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AP EAMCET202125 Aug 2021Evening ShiftChemistryStructure of AtomActual

3.011 10²² atoms of an element weight 1.15 ~g . The atomic mass of the element is

Options

  1. A10 amu
  2. B2.3 amu
  3. C35.5 amu
  4. D23 amu

Correct answer

D. 23 amu

Step-by-step solution

Given, 3.011 10²² atoms of an element weight = 1.15 g Now, 6.023 10²³ (N_A ) atoms of an element will weight =1.15 6.023 10²³ 3.011 10²² =23 ~g The atomic mass of the element is 23 ~g / mol or amu. Note N_A= number of units in one mole of any substance =6.02214076 10²³ .

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