Final answer:
The correct number of molecules in a 2.43 L sample of an ideal gas at STP is 6.53 x 10²± molecules, which does not match the provided answer choices (b) 6.02 x 10²³ molecules or (d) 6.02 x 10²´ molecules.
Step-by-step explanation:
To determine how many molecules are there in a sample of an ideal gas with a volume of 2.43 L at STP (Standard Temperature and Pressure), we use the concept of molar volume. At STP, one mole of any ideal gas occupies 22.4 L. Because of this direct relationship, we can calculate the number of moles in the 2.43 L sample by setting up a simple proportion:
(2.43 L) x (1 mol/22.4 L) = 0.1085 mol
Next, we need to find out how many molecules this amount of moles represents. To do this, we multiply the number of moles by Avogadro's number, which is 6.02 x 10²³ molecules/mol:
0.1085 mol x (6.02 x 10²³ molecules/mol) = 6.53 x 10²± molecules
We can confirm that none of the given answer choices match the calculation result. Thus, the correct number of molecules in a 2.43 L sample of an ideal gas at STP is 6.53 x 10²± molecules, which is not one of the available options provided (b or d).