Calculate the % composition of H2S. Then determine the number of grams of sulfur present in 339.79 g of H2S.
*I don't know how to set up the equation after I find the % composition to find the grams of sulfur. Please help!
To calculate the percent composition of a compound, we need to determine the mass of each element present in the compound and divide it by the molar mass of the compound.
To find the percent composition of H2S, we first need to determine the molar mass of H2S. The molar mass is the sum of the atomic masses of all the atoms in the molecule.
Molar mass of H2S:
- The atomic mass of hydrogen (H) is approximately 1 g/mol. Since there are 2 hydrogen atoms in H2S, the total mass of hydrogen is 2 g/mol.
- The atomic mass of sulfur (S) is approximately 32 g/mol.
- Adding the masses of hydrogen and sulfur, we get:
Molar mass of H2S = 2 g/mol (hydrogen) + 32 g/mol (sulfur) = 34 g/mol
Now we can calculate the percent composition of hydrogen and sulfur in H2S.
Percent composition of hydrogen in H2S:
- There are 2 hydrogen atoms in H2S, and each hydrogen atom has a molar mass of 1 g/mol.
- Total mass of hydrogen = 2 g/mol (molar mass of hydrogen) x 2 (number of hydrogen atoms) = 4 g
- Percent composition of hydrogen = (mass of hydrogen / molar mass of H2S) x 100%
- Percent composition of hydrogen = (4 g / 34 g) x 100% = 11.76%
Percent composition of sulfur in H2S:
- There is 1 sulfur atom in H2S, and sulfur has a molar mass of 32 g/mol.
- Total mass of sulfur = 32 g/mol (molar mass of sulfur) x 1 (number of sulfur atoms) = 32 g
- Percent composition of sulfur = (mass of sulfur / molar mass of H2S) x 100%
- Percent composition of sulfur = (32 g / 34 g) x 100% = 94.12%
Now let's move on to finding the number of grams of sulfur present in 339.79 g of H2S.
To find the grams of sulfur, we need to calculate the mass percent of sulfur in H2S and use it to find the mass of sulfur.
Mass percent of sulfur = Percent composition of sulfur = 94.12%
Now we can calculate the number of grams of sulfur in 339.79 g of H2S:
Mass of sulfur = (mass percent of sulfur / 100) x mass of H2S
Mass of sulfur = (94.12% / 100) x 339.79 g
Mass of sulfur = 0.9412 x 339.79 g
Mass of sulfur = 319.96 g
Therefore, there are 319.96 grams of sulfur present in 339.79 g of H2S.