Question

7. One mole of phosphorous pentachloride contains how many of each of the following:

a. phosphorous pentachloride molecules?
b. phosphorous atoms?
c. chloride atoms?
d. total atoms of all kinds?

Answer 1

a) 6.02 × 10^23

b)6.02×10^23

c)3.01×10^24

d) 3.612×10^24

In every mole of a substance there are 6.02×10^23 entities.

in ( c) there are 5 carbon atoms . 5 is multiplied by the number of moles of the molecule and then multiplied by 6.02×10^23. ( using the formula N=nL )