Chemistry

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/cm³. Gold has a density of 13.1 g/cm³. If a piece of alloy contains 3.70 lbs. of gold, how many kg of aluminum does it contain?

asked by Mom
  1. 70 percent aluminum.

    convert lbs gold to grams.

    massalloy=massgold/.30

    massaluminum=.7 * massalloy

    posted by bobpursley

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