Question

A sample of white gold is: 18.0 grams gold, 3.0 grams silver, 2.0 grams cobalt, and 1.0 gram platinum by mass. what is the percent platinum in the sample?

Answer 1

It's grams-of-platinum/total-grams, so 1g/24g, which is 4.16666%, or 4.2%. Hope this helps!

Answer 2

The answer is: 4.16%

Step-by-step explanation:

In order to know the percentage of one of the elements in the white gold, first we need to add all the components to know the total mass of gold we have. So, 18+3+2+1=24. The total mass of white gold is 24 g. Now, if 1 g of the total 24 g of gold is platinum, divide 1 g between 24 g and multiply by 100 to know the percent: (1/24) * 100 = 4.16 %