Answers by visitors named: Darth Relyt

1. 0.064 2. S = P - 0.25p; $30 3. 3 4. 9

1. Iron oxide has oxygen atoms, and pure iron does not 2. CaCO3 3. Some of the atoms in the paper became gases 4. 2N2 and 6H2 5. It is not possible to produce water without leftover molecules