2007-03-05 09:21:53 · 2 answers · asked by Kelsey S 1 in Science & Mathematics ➔ Chemistry
Divide each of these masses by the Ar of the element concerned. Then convert the numbers you get to a whole-number ratio by dividing them by the smaller of the two. This will give you an empirical formula. Then work out an apparent Mr of this formula, and see what relationship it bears to 216.8 - it should be a simple fraction. Multiply the formula up as required.
2007-03-05 10:05:22 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
Divide the mass of the two elements by their atomic weight. For example, ~40g Pd/~100 g/mol = 0.2 mol. 0.8g H / 1 g/mol = 0.8 mol. So you're approximately PdH4. Grab a calculator to get the exact numbers. If I've misunderstood the question and there's another secret element, it would be 216.8-42.56-0.8g of it, and it would have to be something with relative ratios that make sense. Since I know a bit of chemistry, it's probably oxygen or nitrogen.
2007-03-05 18:04:23 · answer #2 · answered by Some Body 4 · 0⤊ 0⤋