The forensic technician at a crime scene has just prepared a luminol stock solution by adding 13.0 g of luminol into a total vol
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Answer: The pressure will be equal to 0.19 atm.
Explanation:
The Ideal Gas Equation states the relationship among the pressure, temperature, volume, and number of moles of a gas.
The equation is:
where P = pressure in <em>atm</em>
V = volume in <em>L</em>
n = numbers of moles of gas in <em>mol</em>
R = universal gas constant = 0.08206
T = temperature in <em>K</em>
Based on the problem,
mass of O2 = 1.0 g
V = 4.00 L
T = 293 K
mol of O2 = ?
P = ?
We need to calculate the moles of O2 before we can use the Ideal Gas Equation. To solve the number of moles, we use the equation:
The molar mass of O2 is 32 g/mol, therefore,
no. of moles of O2 = 0.03125 mol.
Now we substitute the values into the Ideal Gas equation:
Solving for P, we will get
In correct significant figures, P is equal to 0.19 atm.