moles of weigh and moles of weigh . The molar masses and in are:

Question

moles of  weigh  and  moles of  weigh . The molar masses  and  in  are:

Canvas Classes · Accepted Answer

Strategy:
 Set up two simultaneous linear equations based on the molar mass definitions of the two compounds  and . Solve the system to find the individual molar masses.

Step 1: Formulate the equations in SI units
Mass is given in . Let  and  be molar masses in .
- For :  ...(1)
- For :  ...(2)

Step 2: Solve the system
Subtracting Eq (1) from Eq (2):
.
Substitute into (1):
.

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