Chapter 3

Question 1

Avogadro’s Number

Answer 1

6.022 x 10^23

= 1 mol

Question 2

convert from grams to molecules

Answer 2

find amu on periodic table. X amu = g X = 1 molecule X (1 molecule X= 6.022 x 10^23)

Question 3

How many moles of PCl3 are in 8 g of PCl3

Answer 3

1 P = 1 x 30.97
3 Cl= 3x 35.45
added together = 137.92 g/mol

8g x (1 mol / 137.32g PCl3)

= 0.058 mol PCl3