A sample of and weighed is ignited to constant weight of . The composition of the mixture is: (: , )

Question

A sample of  and  weighed  is ignited to constant weight of . The composition of the mixture is: (: , )

Canvas Classes · Accepted Answer

Strategy:
 Identify the components by mass using decomposition stoichiometry. The mass of residue consists of  and . Set up a system of two equations to solve for the individual masses.

Step 1: Set up equations
Let mass of , mass of .
1) 
2)

Step 2: Solve the mixture
.
Substituting  gives .
Thus .

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