An alloy is made of 30% copper, 45% nickel and rest of zinc. Find the mass of zinc in 640gm of the alloy.
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Answer:
Step-by-step explanation:
copper = 30% , nickel = 45%
copper + niickel = 30% + 45% = 75%
rest mass is of zinc
= (100 - 75)% = 25%
total mass of alloy = 640g
Mass of zinc in alloy
= 25% of 640
= 25 × 640/ 100 = 160g
Answer: mass of zinc in alloy = 160g
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