Prelab for Counting Very Small Things

Name ___________________________

1. Which has the greater mass, 12 bowling balls or 12 golf balls?  Or do they have the same mass?

2. Which has the larger number of seeds, 12 g of rice or 12 g of peach pits?  Or do they have they have the same number of seeds?

3. Why are seeds typically sold by the pound or ounce as opposed to by the seed?

4. Carefully consider Table 3.3 on p 141 in the text. Would the following be an acceptable additional entry for this table?

C + O₂ à CO₂

1 gram 1 gram 1 gram

of C atoms of O₂ molecules of CO₂ molecules

Defend your answer.