Question #28af1

1 Answer
Oct 25, 2016

Answer:

#5.6 xx 6.022 xx 10^23"atoms"#

Explanation:

A mole of #"PCl"_3# contains

  • one mole of #"P"#
  • three moles of #"Cl"#

Therefore, you get a total of 4 moles of atoms per mole of #"PCl"_3#. This means that #1.4# moles of #"PCl"_3# contain

#1.4 xx 4 = "5.6 moles of atoms"#

Each mole of atoms contains Avogadro's number, #6.022 xx 10^23#, of atoms. Therefore, the sample contains

#5.6 xx 6.022 xx 10^23"atoms"#.