Final answer:
To find the number of atoms of S in 4.30 grams of CS₂, convert the mass of CS₂ to moles. Then, use the mole ratio to find the number of moles of sulfur. Finally, use Avogadro's number to convert moles of S to atoms.
Step-by-step explanation:
To determine the number of atoms of S in 4.30 grams of CS₂, we need to convert the mass of CS₂ to moles using its molar mass. The molar mass of CS₂ is 76.14 g/mol.
First, calculate the number of moles of CS₂:
moles = mass / molar mass = 4.30 g / 76.14 g/mol = 0.05643 mol
Since there are two sulfur atoms per CS₂ molecule, we can use the mole ratio to find the number of moles of sulfur:
moles of S = 2 * moles of CS₂ = 2 * 0.05643 mol = 0.11286 mol
Finally, use Avogadro's number (6.022 × 10^23 atoms/mol) to convert moles of S to atoms:
number of atoms of S = moles of S * Avogadro's number = 0.11286 mol * 6.022 × 10^23 atoms/mol = 6.79 × 10^22 atoms of S