AP Chem. Problemo

Test Preparation AP Test Preparation
1

<p>Ok, I seriously do not know what to do with this problem. Any help will be greatly appreciated.</p>

<p>A 1.42g sample of a pure compound, with formula M2SO4, was dissolved in water and treated with an excess of aqueous calcium chloride, resulting in the precipitation of all the sulfate ions as calcium sulfate. The precipitate was collected, dried and found to weigh 1.36g. Determine the atomic mass of M, and identify M.</p>

2

<p>proceed with the prolem as you usually do, but instead of molar mass of M, palce an x or any other unknown. The answer will be obvious from the equation that you set up.</p>