Final answer:
To find the number of atoms of S in 4.30 grams of CS2, you need to convert grams of CS2 to moles, determine the ratio between carbon and sulfur atoms in CS2, and then multiply the number of moles of sulfur by Avogadro's number. Therefore we get 6.74 x 1022 atoms of S.
Step-by-step explanation:
To determine the number of atoms of S in 4.30 grams of CS2, we first need to find the number of moles of CS2. The molar mass of CS2 is (12.01 x 1) + (32.07 x 2) = 76.09 g/mol. To find the number of moles, we divide the mass of the sample by the molar mass: 4.30 g / 76.09 g/mol = 0.056 moles.
Next, we use the chemical formula CS2 to determine the ratio between carbon and sulfur atoms. There are 1 carbon atom and 2 sulfur atoms in each molecule of CS2. Therefore, in 0.056 moles of CS2, there are 0.056 x 2 = 0.112 moles of sulfur atoms.
Finally, to find the number of sulfur atoms, we multiply the number of moles by Avogadro's number: 0.112 moles x 6.02 x 1023 atoms/mol = 6.74 x 1022 atoms of S.