Limiting Reactant Problems

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3 F $_2$ + S $\longrightarrow$ SF $_6$

Sulfur hexafluoride, a very good indicator, is prepared by the reaction of sulfur with elemental fluorine. What mass of SF $_6$ can be produced from the reaction of 150 g of S with 650 g of F $_2$ ?

MM of F $_2$ = 38.00 g/mol

MM of SF $_6$ = 146.06 g/mol

Posted by Andrew Gomez a year ago

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2 Al + Fe $_2$ O $_3$ $\longrightarrow$ Al $_2$ O $_3$ + 2 Fe

An operation requires at least 86.0 g of Fe to be produced. What is the minimum mass in grams of Fe $_2$ O $_3$ necessary to produce the desired amount of products? How much Al $_2$ O $_3$ is produced as a side product?

MM of Fe $_2$ O $_3$ = 159.489 g/mol

MM of Al $_2$ O $_3$ = 101.961 g/mol

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