# Determine the identity of an unknown metal

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

https://brainmass.com/chemistry/stoichiometry/determine-identity-unknown-metal-271132

#### 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.

$2.19