Final answer:
To find the number of moles in 160.0 g of SO2, divide the mass by the molar mass of SO2, which is 64.07 g/mol, resulting in 2.50 moles of SO2.
Step-by-step explanation:
To determine how many moles of SO2 are in 160.0 g of SO2, we must first establish the molar mass of SO2.
The molar mass of sulfur dioxide (SO2) can be calculated as follows:
Molar mass of S = 32.07 g/mol (1 atom of sulfur)
Molar mass of O = 16.00 g/mol (2 atoms of oxygen)
Therefore, molar mass of SO2 = 32.07 g/mol + (2 × 16.00 g/mol) = 64.07 g/mol.
With the molar mass, we can use the formula:
Number of moles = mass of substance (g) / molar mass of substance (g/mol)
For 160.0 g of SO2:
Number of moles = 160.0 g / 64.07 g/mol = 2.50 moles of SO2