This is actually my sisters homework problem (junior in highschool)- she spent time trying to figure it out and her teacher gave her some formulas to help her out. She finally asked big sister for help, and I have no clue where to start for this! I've been working on it for over an hour. Here's the prob:
Gold and silver alloy weighs 9.85g, has a volume of 0.675cm3. Gold has a density of 19.39g/cm3 and silver 10.5g/cm3. Calculate the percentage of Gold in grams that is contained in the alloy.
Her teacher gave her the following formulas:
9.85g = x(g) + y(g)
0.675cm3 = x(1cm3/19.3g) = y(1cm3/10.5g)
We easily figured out the density of the alloy = 14.59 g/cm3, but we have no idea where to go next. Could you give us a few ideas to help us along? Thank you so much!