Brass Made

Mathematics Please Help word problem ?

2) Copper and Zinc are melted together in the ratio 3:2 to make the alloy, brass.
Calculate the amount of

a) Copper in 660g of brass. (2pts)

b) Zinc, when the alloy contains 372g of copper. (2pts)

i want explanation of the answers please . thank you . 5 stars.

Copper in 660g of Brass
= 3 'part' copper for every 2 'part' zinc
= 5 'parts' to make brass
divide 660g by 5 to get how many each 'part' is worth = 132g
132g times 3 (part of brass made up of copper) = 396g of copper in 660g of brass

Again

Zinc with 372g of copper

this time you have the 'part' given but not the product
You know that to make brass, there are 3 'parts' of copper needed, so divide 372g by 3 to get what one 'part' is worth
= 372/2 = 124g
so every 'part' is worth 124g
now just times it by the amount of 'parts' zinc needs (2)
= 124g * 2 = 248g of zinc with 372g of copper

(:

hope I helped x

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