Exactly 4.0 g of hydrogen gas combines with 32 g of oxygen gas according to the following reaction. 2H2 + O2 → 2H2O a. How many hydrogen molecules are required to completely react with 42 oxygen molecules? molecules b. If you conducted the reaction, and it produced 4.8 mol H20, how many moles of both О2 and H2 did you start with? mol 02 mol H2 c. If you started with 53.2 g 02, how many grams of H2 did you start with to have a complete reaction? g. d. How many grams of O2 and H2 were reacted to produce 23.6 g H2O? g O2 g H2

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".