Dilute sulfuric acid can be used to remove rust iron (III) oxide from iron in a process known as pickling. a)  Write the equation for the reaction between iron (III) oxide and b) calculate the mass of rust which can be removed by reaction with 49g of sulphuric acid.  a) 3H2SO4 + Fe2O3 = Fe2(SO4)3 + 3H2O  note: I've done part a but I need help with part b.

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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".