Module1-worksheet2.doc - 1. Convert the following: 0.25 m =...

1. Convert the following:
2. Calculate the number of particles in the following substances (remember that in 1 mole there are
6.02 x 10 23 particles).
a) 5.00g of Pb
b) 100g of N
2
3. Calculate the mas of the following.
a) 1.50 x 10 24 molecules of CO
2
b) 2.00 x 10 20 atoms of Mg
4. Calculate the mass of KMnO
4
in 25 cm 3 of a 0.02 moldm -3 solution.
5. What is the molarity of 1.06g of H
2
SO
4
in 250 cm 3 of solution?
1

6. A solution of hydrochloric acid of volume 25.0 cm 3 was pipetted onto a piece of marble which is
calcium carbonate. When all action had ceased, 1.30g of the marble had dissolved. Find the