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A sample of an oxide of antimony (Sb) contained 30.0g of antimony combined with 9.8g of...

A sample of an oxide of antimony (Sb) contained 30.0g of antimony combined with 9.8g of oxygen. The simplest formula for the oxide is...?

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Homework Answers

Answer #1

Sb2O5

Explanation

Mass of Antimony = 30.g

Molar mass of Antiminy = 121.760g/mol

No of mole of Antimony = 30.g/121.760g/mol =0.2464mol

Mass of Oxygen = 9.8g

Molar mass of Oxygen = 16g/mol

No of mole of Oxygen = 9.8g/16g/mol = 0.6125

Divide each mole by lowest of them

Oxygen : 0.6125/0.2464 = 2.49

Antimony : 0.2464/0.2464 = 1

multiply the above reuslt by 2 to make whole No

Oxygen : 2.49 ×2 = 5

Antimony : 1×2 = 2

So, the simplest formula for Antimony oxide is Sb2O5

  

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