Magically Turn Copper Into Gold सोना #shorts #bluebox

An alloy of copper, silver and gold is found to have copper forming the simple cubic close packed lattice. If the silver atoms occupy the face centres and gold is present at the body centre, then the formula of the alloy will be

An alloy of copper, silver and gold is found to have copper constituting the ccp lattice. If silver atoms occupy the edge centres and gold is present at body centre, the alloy has a formula :

Gold is 19 times heavier than water. Copper is 9 times heavier than water. In which ratio gold and copper should be mixed so that mixture is 15 times heavier than water ?

What are the favourable qualities given to gold when it is alloyed with copper of silver for the purpose of making oranaments?