I've got some Chemistry hwrk and I need to find out what is in 9 carat gold.
2007-06-09 22:54:14 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
37.5% Gold = 9 carat. The rest can be just about anything and depends on the desired alloy color and desired physical properties. Typical compositions include:
White (silver) Gold would be 62.5% silver
Whine (nickel) Gold is 40% copper, 10.5% nickel and 12%zinc
Pale Yellow Gold is 55 % silver and 7.5% copper
Yellow Gold is 42.5% silver and 20% copper
Dark Yellow Gold is 31.25 silver and 31.25 copper
Pink Gold is 20% silver and 42.5% copper
Red Gold is 7.5 % silver and 55% copper
2007-06-12 16:31:25 · answer #1 · answered by Metallic stuff 7 · 2⤊ 1⤋
gold and copper usually. 24 carat is pure gold. so (9/24)*100 is the percentage of gold in 9 carat gold. The rest should be copper
2007-06-10 06:02:34 · answer #2 · answered by ABDE 3 · 0⤊ 1⤋
gold, silver, and copper.
see ref below for more info.
2007-06-10 12:38:05 · answer #3 · answered by sirbobby98121 7 · 0⤊ 0⤋