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Answer :
Use the molar mass to calculate the grams of F. There is 3.46 grams of Fare in 135 g CaF2.
To determine the grams of F in 135 g CaF2, we need to find the molar mass of CaF2 and then determine the ratio of F to CaF2.
The molar mass of CaF2 can be calculated by summing the atomic masses of its elements. Ca has a molar mass of 40.08 g/mol and F has a molar mass of 18.99 g/mol.
So, the molar mass of CaF2 is 40.08 + (2 * 18.99) = 78.06 g/mol. Now, we can calculate the grams of F in 135 g CaF2.
Since there are 2 moles of F per 1 mole of CaF2, we can set up a proportion:
135 g CaF2 = x g F
78.06 g/mol CaF2 = 2 g/mol F
Cross multiplying, we get:
x g F = (135 g CaF2)(2 g/mol F) / 78.06 g/mol CaF2
Simplifying, we have:
x g F = 3.46 g F
Therefore, there are 3.46 grams of F in 135 g CaF2.
To learn more about molar mass:
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