4. a bubble of helium gas has a volume of 2.31 l near the bottom of a large aquarium where the pressure is…

4. a bubble of helium gas has a volume of 2.31 l near the bottom of a large aquarium where the pressure is 1.65 atm and the temperature is 5.0°c. determine the number of moles of helium in the bubble. use r value of 0.0821 l atm/mol k type a response

4. a bubble of helium gas has a volume of 2.31 l near the bottom of a large aquarium where the pressure is 1.65 atm and the temperature is 5.0°c. determine the number of moles of helium in the bubble. use r value of 0.0821 l atm/mol k type a response

Answer

Explanation:

Step1: Convert temperature to Kelvin

$T = 5.0 + 273.15=278.15\ K$

Step2: Use ideal - gas law $PV = nRT$ to find $n$

$n=\frac{PV}{RT}$, where $P = 1.65\ atm$, $V = 2.3\ L$, $R=0.0821\ L\ atm/mol\ K$, $T = 278.15\ K$ $n=\frac{1.65\times2.3}{0.0821\times278.15}$ $n=\frac{3.795}{22.836115}\approx0.166\ mol$

Answer:

$0.166\ mol$