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6 March, 14:25

Tin (ii) fluoride (snf2) is often added to toothpaste as an ingredient to prevent tooth decay. what is the mass of f in grams in 36.5 g of the compound?

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  1. 6 March, 14:34
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    From the periodic table:

    molar mass of Sn = 118.71 grams

    molar mass of F = 18.99 grams

    This means that:

    molar mass of SnF2 = 118.71 + 2 (18.99) = 156.69 grams

    Therefore, 156.69 grams of SnF2 contains 37.98 grams of F. To know the amount of F in 36.5 grams of the compound, we will simply do a cross multiplication as follows:

    mass of F = (36.6 x 37.98) / 156.69 = 8.847 grams
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