Homework Help: Chemistry

Posted by Mom on Sunday, October 9, 2011 at 2:30pm.

A homogenous mixture of metals is called an alloy. An alloy is found to be 30% by volume gold with the rest being aluminum. Aluminum has a density of 2.70 g/cmł. Gold has a density of 13.1 g/cmł. If a piece of alloy contains 3.70 lbs. of gold, how many kg of aluminum does it contain?

Chemistry - bobpursley, Sunday, October 9, 2011 at 2:52pm
70 percent aluminum.

convert lbs gold to grams.

massalloy=massgold/.30

massaluminum=.7 * massalloy

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