Final answer:
To find the number of moles of SO2 in 16.6L at STP, divide the volume of the gas by the molar volume of a gas at STP, which is 22.4 L/mol. The calculation yields approximately 0.741 moles of SO2.
Step-by-step explanation:
The question asks us to calculate the number of moles of sulfur dioxide (SO2) present in 16.6 liters at standard temperature and pressure (STP).
According to the concept of molar volume, at STP, one mole of any gas occupies 22.4 liters.
To find the number of moles, we can set up a conversion using this molar volume as a factor.
The calculation is as follows:
Number of moles = Volume of gas at STP / Molar volume at STP
Number of moles = 16.6 L / 22.4 L/mol
Therefore, the moles of SO2 in 16.6 L at STP is approximately 0.741 moles.