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20 November, 01:46

How many atoms are in 1.4 mol of phosphorus trifluoride (PF3) ?

a. 8.4 * 1024

b. 3.4 * 1023

c. 8.4 * 1023

d. 3.4 * 1024

+4
Answers (2)
  1. 20 November, 02:00
    0
    It's D 3.37 x 10^24 Round up
  2. 20 November, 05:03
    0
    NA = 6.022*10^23

    number of atoms = number of moles * avogadros number

    number of atoms = 6.022*10^23 * 1.4 moles * 4 atoms / molecules of PCl3

    Number of atoms = 3.37*10^23 atoms.
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