A sample in lab displaces 15 mL of water in a graduated cylinder. When placed on a scale the mass is 8.7 g. What is the density
1 answer:
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Answer: Total pressure of the gas will be 0.716atm.
Explanation: We are given a gas having initial conditions as
V = 27L
T = 32°C = 305K
P = 2.5atm
As the gas remains same, number of moles of a gas will also be same for initial and final conditions. To calculate the number of moles, we use ideal gas equation, which is,
.......(1)
where, R = gas constant =
For calculating number of moles:
Putting the values of initial condition in this equation, we get
n = 2.696 mol
Now, the final conditions are,
V = 88.0L
T = 12°C = 285K
n = 2.696 mol (calculated above)
P = ? atm
Again using equation 1, we get
P = 0.716atm.