Mole ratios for a solving a stoichiometry problem are obtained from the

1. Molar Mass
2. Periodic Table
3. Balanced Equation
4. Total Mass of the Products

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer