In general,how many unit factors are required to solve a volume-mass stoichiometry problem?

Question

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Three unit factors are typically required to solve a volume-mass stoichiometry problem: one to convert volume to moles (using the molar volume of a gas at STP or the density of a liquid or solid), one to convert moles of the given substance to moles of the desired substance (using the mole ratio from the balanced chemical equation), and one to convert moles of the desired substance to mass (using the molar mass of the substance).

In General,how Many Unit Factors Are Required to Solve a Volume-Mass