How many ethane molecules are in 22.4 liters of C₂H₆ gas at STP?

Question

Quizplus · Accepted Answer

According to Avogadro's Law, at STP (Standard Temperature and Pressure), one mole of any gas occupies 22.4 L of volume. The molar mass of ethane (C2H6) is approximately 30 g/mol. To find the number of moles in 22.4 L of ethane at STP, we can use the following calculation:

22.4 L / 22.4 L/mol = 1 mol

Therefore, there is 1 mole of ethane in 22.4 L of ethane gas at STP. Since 1 mole contains 6.02 x 10^23 molecules (Avogadro's number), we can calculate the number of ethane molecules in 22.4 L of ethane gas at STP as follows:

1 mol x 6.02 x 10^23 molecules/mol = 6.02 x 10^23 molecules

Therefore, there are 6.02 x 10^23 ethane molecules in 22.4 L of ethane gas at STP, which is answer choice D.

How Many Ethane Molecules Are in 22