MOLE (NUMERICALS)

A) How many grams are there in:

a) 2 moles of oxygen.              64g

b) 0.01 mole of nitrogen.      0.28g

c) 0.5 mole of O₂.                      16g

d) 0.2 mole of H₂.                      0.4

e) 0.2 mole of Al.                       5.4

f) 0.1 mole of HCl.                  3.65g

g) 0.2 mole of H₂O.                     3.6

h) 0.1 mole of CO₂.                   4.4g

B) How many mole atoms are there in:

a) 112g of Iron.                             2

b) 48g of oxygen.                          3

c) CO₂ which contains 8g of O₂.   0.25

d) 0.8g of methane.                  0.05

C) Which of the following would weigh most ?

a) 1 mole of H₂O

b) 1 mole of CO₂

c) 1 mole of NH₃     

d) 1 mole of CO