Solve Mass-Mole Conversion: 1kg CaF2 = 13mol

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SUMMARY

The discussion centers on the conversion of 1 kg of calcium fluoride (CaF2) to moles, confirming that 1 kg of CaF2 equals approximately 13 moles. The molar mass of CaF2 is established as 78.074 g/mol. The correct conversion process involves dividing the total grams (1000 g) by the molar mass, leading to the calculation of 1000 g / 78.074 g/mol, which yields approximately 12.8 mol, confirming the initial assertion of 13 mol.

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Homework Statement


Show that 1kg of CaF2 equals 13 mol.

Homework Equations


Molar mass CaF2 = 78.074g/mol

The Attempt at a Solution


I can take 78.074g/mol CaF2 * 13 mol = 1014.962 g CaF2
But I can't do this equation backwards, I'm missing a step. I would think if I'm converting g/mol to mol, I would divide by how many grams I have (1000 in this case), but 78.074g/mol CaF2 / 1000g [tex]\neq[/tex] ~13mol.Edit: I'm dumb. 1000/78.074 = ~13mol. Kill me now.
 
Last edited:
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You got it correctly on your own, there is still hope :wink:

Pay attention to units:

[tex]\frac {78 \frac g {mol}} {1000 g} = 0.078 \frac 1 {mol}[/tex]

- and it is obvious what went wrong.
 

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