Posted by Hannah on .
A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the chlorine? The atomic weight of the chlorine is 35.453 amu. What is the atomic weight of X? what is the identity of X
2.948 g/L x 0.4810L = ?? grams.
Convert ??grams t moles. moles = grams/molar mass.
.........2X + Cl2 ==> 2XCl
Set up an ICE chart. YOu know Cl2 is? moles; then twice that must be mols X and n = grams/molar mass. Solve for molar mass. Look on the periodic table to identify the element.