Question

Use the molar volume to calculate each of the following at STP: Part A : the number of moles of O2 in 54.8 L of O2 gas

Answer 1

To calculate the number of moles of O2 in 54.8 L of O2 gas at STP, we use the molar volume of 22.4 L/mol as a conversion factor. The calculation yields 2.45 moles of O2.

Step-by-step explanation:

The student is asked to calculate the number of moles of O2 in 54.8 L of O2 gas at STP (Standard Temperature and Pressure). At STP, one mole of any gas occupies 22.4 L. To find the number of moles of O2, we use this molar volume as a conversion factor:

1 mol O2 / 22.4 L = x mol O2 / 54.8 L

To solve for x, which represents the number of moles of O2, we multiply both sides of the equation by 54.8 L and then divide by 22.4 L:

x = (54.8 L × 1 mol O2) / 22.4 L

Thus:

x = 2.45 mol O2

Therefore, there are 2.45 moles of O2 in 54.8 L of O2 gas at STP.