Question

How many molecules are there in 6.73 moles of phosphorus trichloride? (write your answer in scientific notation).

Answer 1

Answer: There are
`4.05* 10^(24)` molecules in 6.73 moles of phosphorus trichloride

Step-by-step explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
`6.023* 10^(23)` of particles.

1 mole of
`PCl_3` contains =
`6.023* 10^(23)` molecules

Thus 6.73 moles of
`PCl_3` contains =
`(6.023* 10^(23))/(1)* 6.73=4.05* 10^(24)` molecules

Thus there are
`4.05* 10^(24)` molecules in 6.73 moles of phosphorus trichloride