I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow.
Determine the pressure inside a televison picture tube with a volume of 3.5L that contains 2.00 x 10-5g of nitrogen gas at 22.0C?
Use PV = nRT
T is in Kelvin.
n = moles = grams/molar mass. Solve for P
okay so what is the R for?
R is a constant = 0.08206 L*atm and give pressure in atmospheres. You can change to torr or mm Hg by multiplying atm x 760.
I cant do it, But thank you for trying to help me,
n = moles N2 = 2.00 x 10^-5/28 = ??
The PV = nRT
P*3.5L = ??n*0.08206 x (273+22).
Solve for P in atmospheres.
To determine the pressure inside the television picture tube, we can use the ideal gas law equation: PV = nRT.
Here's how you can solve the problem step by step:
1. Start by identifying the given information:
- Volume (V) of the television picture tube = 3.5 L
- Amount of nitrogen gas (n) = 2.00 x 10^-5 g
- Temperature (T) = 22.0 °C
2. Convert the temperature from Celsius to Kelvin:
- Kelvin = Celsius + 273.15
- T = 22.0 + 273.15 = 295.15 K
3. Convert the mass of nitrogen gas (n) to moles:
- Since the ideal gas law uses moles, we need to convert grams to moles.
- To convert grams to moles, divide the given mass by the molar mass of nitrogen gas (N2).
- The molar mass of N2 is approximately 28 g/mol.
- Moles (n) = (2.00 x 10^-5 g) / (28 g/mol)
4. Substitute the values into the ideal gas law equation:
- PV = nRT
- P(3.5 L) = [(2.00 x 10^-5 g) / (28 g/mol)](0.0821 L·atm/(mol·K))(295.15 K)
5. Solve for pressure (P):
- Rearrange the ideal gas law equation to solve for pressure:
- P = [(2.00 x 10^-5 g) / (28 g/mol)](0.0821 L·atm/(mol·K))(295.15 K) / (3.5 L)
- Calculate this expression to find the pressure inside the television picture tube.
Remember to use correct units throughout the calculations and be cautious about significant figures to round your final answer properly.
I hope this step-by-step explanation helps you solve the problem and complete your assignment. If you have any further questions, feel free to ask!