Question

An alloy alloy contains 25% gold 12% silver and 63% platinum . find the mass of gold in 1kg of alloy ? (pls tell answer )

Answer 1

Total mass of gold = 25/100 × 1 =1/4 = 0.25kg..
Like this

25% + 12% + 63% = 100%
So we have all the constituents..

Finding the mass of gold
=25% of 1 (because of 1 kg alloy)
=25/100×1
=0.25kg

Finding mass of silver
=12% of 1
=12/100 × 1
= 0.12kg

Finding mass of platinum
=63% of 1
=63/100 × 1
=0.63kg

Total sum of all constituents = 0.25 + 0.12 + 0.63 = 1 kg

Hope it helps u ..