Lead can be prepared from galena [lead(II) sulfide] by firstroasting the galena in oxygen gas to form lead(II) oxide and sulfur dioxide. Heating the metal oxide with more galena forms themolten metal and more sulfur dioxide.(a) Write a balanced equation for each step.(b) Write an overall balanced equation for the process.(c) How many metric tons of sulfur dioxide form for every met-ric ton of lead obtained?

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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".