Question

duralin is an alloy of aluminum containing 4.5 percent manganese, 3.5 percent of copper, and 0.45 percent of magnesium. how much manganese is present in a 40 g same of this alloy

Answer 1

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Answer 2

As it contain 91.5% of manganese in that alloy

So 91.5% of 40 gram is 36.6 gram. So this amount of manganese is present in 40 g of duralin.