A Mg-Al alloy has a mass of 0.263 g and a density of 2.40 g/cm3. The density of pure Mg =
1.74 g/cm3 and for pure Al = 2.70 g/cm3. Calculate the % Mg in the alloy.
The Attempt at a Solution
Well I'm not really sure where to do. I solved for the volume of the alloy, then tried to use it to determine the mass of the Mg. Once there I divided by the total mass and multiplied by 100 to get the wrong answer.
How can I go about getting the mass of Mg in the alloy?