
Interpretation: Whether10 mL of oxygen gas or 15 L of hydrogen gas has more particles needs to be determined.
Concept Introduction: The ideal gas equation is represented as follows:
Here, P is pressure, V is volume, n is number of moles and T is temperature of the gas.
R is Universal gas constant with value
In 1 mol of any substance there are

Answer to Problem 6E
A balloon filled with 15 L of hydrogen gas has more particles than balloon filled with 10 L of oxygen gas.
Explanation of Solution
At STP, the temperature and pressure values are 273.15 K and 1 atm respectively. The volume of oxygen and hydrogen gas is given 10 L and 15 L respectively.
To calculate the number of particles of oxygen gas and hydrogen gas, number of moles of each needs to be calculated.
The ideal gas equation is represented as follows:
On rearranging,
Putting the values to calculate the number of moles of oxygen gas,
Similarly, the number of moles of hydrogen gas will be:
The number of particles can be calculated using the Avogadro’s number as follows:
Similarly,
Thus, the number of particles of hydrogen gas is more than oxygen gas.
Thus, a balloon filled with 15 L of hydrogen gas has more particles than balloon filled with 10 L of oxygen gas.
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