An iron bar initially has a mass of 112 g. Upon exposure to air, it forms rust. The total mass of the system becomes 160 g. If rust consists of two parts iron to three parts oxygen, what would be the mass of each oxygen part bound in the iron bar?
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Answer:
48g
Explanation:
Calculate the sum or difference:3×48/3
Cross out the common factor:48
get the result:48
anwer:48
yan po hope it helps