Question

please give me answers ​

Answer 1

Answer: concentration of gold is 75% and copper is 25%.

Explanation:

Total part = 18(gold)+6(copper)

=24

....

Concentration of gold = mass of gold×100/total mass

=18×100/24

=75%

For the copper

Mass of copper×100/total mas

=6×100/24

=25%