Final answer:
The number of moles of S in 29.7 g of (C3H5)2S is 0.479 moles.
Step-by-step explanation:
The molar mass of (C3H5)2S can be calculated by adding up the molar masses of all the atoms present. The molar mass of carbon (C) is 12 g/mol, hydrogen (H) is 1 g/mol, and sulfur (S) is 32 g/mol.
So, the molar mass of (C3H5)2S is 3(12) + 5(1) + 32 = 62 g/mol.
Next, we can use the given mass of 29.7 g and the molar mass of (C3H5)2S to calculate the number of moles.
The number of moles is equal to the mass divided by the molar mass, so the number of moles of (C3H5)2S in 29.7 g is 29.7 g / 62 g/mol = 0.479 moles.