Question

Question 6

Use the mole concept to calculate the number of formula units that are in a 1.75-mol sample of NaCl.

Answer 1

Answer: There are
`10.5* 10^(23)` formula units in 1.75 mol sample of NaCl.

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 NaCl contains =
`6.023* 10^(23)` formula units

Thus 1.75 mol of NaCl contains =
`(6.023* 10^(23))/(1)* 1.75=10.5* 10^(23)` formula units

Thus there are
`10.5* 10^(23)` formula units in 1.75 mol sample of NaCl.