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Determine the identity of an unknown metal

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An atom of an unknown metallic element X combines with a fluorine atom in a 1 to 1 ratio. Fluorine gas is a diatomic molecule (F2) and has a density of 1.6 grams/liter. If exactly 132.9 grams of the metal X combines with 11.88 liters of fluorine gas, determine the identity of the unknown metal X.

Hint: For every atom of fluorine that combines, one atom of the metal element X combines. Remember the conservation of mass.

Answer is one of the following:

a. Na
b. Mg
c. Al
d. Cs
e. Cr

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Solution Preview

Hi there,

11.88 x 1.6 =  19.01 since liters x density = grams
19.01/38 (molecular mass of ...

Solution Summary

The expert determines the identity of an unknown metal.