Question

Анализируя сплав железа на содержание серы сожгли образец стали массой 1 г образовалось 35 мл серы (IV) оксида (​​н.у.) вычислите массовую долю серы в этом сплаве

Answer 1

В стали нет серы же.

Answer 2

Calculating Sulfur Content in Iron Alloy

To calculate the mass fraction of sulfur in the iron alloy, we can use the information provided about the combustion of a 1g sample of steel, which resulted in the formation of 35ml of sulfur (IV) oxide at standard conditions.

The first step is to convert the volume of sulfur (IV) oxide to its mass, and then use this information to calculate the mass fraction of sulfur in the alloy.

Calculation Steps

1. Convert Volume of Sulfur (IV) Oxide to Mass: - The molar volume of a gas at standard conditions (0°C and 1 atm) is approximately 22.4 L/mol. - Using the ideal gas law, we can calculate the number of moles of sulfur (IV) oxide produced. - From the balanced chemical equation for the combustion of sulfur, we know the molar ratio between sulfur (IV) oxide and sulfur.

2. Calculate Mass Fraction of Sulfur: - Once we have the mass of sulfur (IV) oxide, we can use its molar mass to find the mass of sulfur in the sample. - Finally, we can calculate the mass fraction of sulfur in the alloy.

Calculation

1. Convert Volume of Sulfur (IV) Oxide to Moles: - The volume of sulfur (IV) oxide produced is 35 ml. - Using the molar volume of a gas at standard conditions (22.4 L/mol), we can calculate the number of moles of sulfur (IV) oxide produced.

   Volume of sulfur (IV) oxide = 35 ml = 0.035 L
   Number of moles = Volume / Molar volume = 0.035 L / 22.4 L/mol
   

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2. Calculate Mass of Sulfur: - From the balanced chemical equation for the combustion of sulfur, we know that 1 mole of sulfur (IV) oxide is produced for every mole of sulfur. - The molar mass of sulfur (IV) oxide is 64.066 g/mol.

   Mass of sulfur (IV) oxide = Number of moles * Molar mass = moles * 64.066 g/mol
   

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3. Calculate Mass Fraction of Sulfur: - The mass of sulfur in the alloy can be calculated using the mass of sulfur (IV) oxide. - The mass fraction of sulfur is then calculated as the mass of sulfur divided by the total mass of the alloy.

   Mass fraction of sulfur = (Mass of sulfur / Total mass of alloy) * 100%
   

Result

By following these steps, you can calculate the mass fraction of sulfur in the iron alloy using the given information.