What is an easy way to add chemical reactions like P4O10(s) + 6H2O(l) → 4H3PO4

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?