What mass of sulphur is contained in 30 g of iron pyrites `(Na_(2)B_(4)O_(7),10H_(2)O)=H=1B=11,O=16,Na=23)`

Explanation

To find the mass of sulfur contained in 30 g of iron pyrites (FeS₂), we will follow these steps:

### Step 1: Calculate the molar mass of FeS₂
- The molar mass of iron (Fe) is 56 g/mol.
- The molar mass of sulfur (S) is 32 g/mol.
- Since there are 2 sulfur atoms in FeS₂, the total mass of sulfur in one mole of FeS₂ is:

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