We use the ideal ags equation to get: number of moles (n) = PV / RT, where P is pressure in atm (790 / 760 = 1.04 atm), V is volume in liters, T is temperature in K ( 273 + 26 = 299 K) and R is gas constant
n = 1.04 * 5 / (0.0821 * 299) = 0.212 mol
2.-Calculate the number of moles of CH4 in a 5.00 L cylinder if the temperature is...
If 5.00 moles of a gas at constant temperature and pressure occupies a volume of 132.5L, what volume will 1.36 moles occupy at the same temperature and pressure? 0901.0L O 19.49 L O 2.052 X 10–3L 0487.12 0 36.04 L What would be the new pressure if a 250 mL gas sample at 380 mm Hg is expanded to 500 mL with no change in temperature? 0 190 mmHg 0 380 mmHg 0 950 mmHg 0 570 mmHg O 760...
A) Calculate the final temperature, in degrees Celsius, if n and V do not change. A sample of air at 50. ∘C and 750. mmHg is cooled to give a pressure of 710. mmHg. B) A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas (n1), and its volume is 50.0 L (V1). If 0.500 mole of gas leak out, and the pressure and temperature remain the same, what is the...
how many moles of helium are present in a 5.00 cylinder at a pressure of 3.85 atm and a temperature of 24
5.00 moles of an ideal gas are contained in a cylinder with a constant external pressure of 1.00 atm and at a temperature of 523 K by a movable, frictionless piston. This system is cooled to 423 K. A) calculate work done on or by the system, w (J) B. Given that the molar heat capacity for an ideal gas is 20.8 J/mol K, calculate q (J) C. Calculate the change in internal energy for this ideal system,in J
The thermochemical equation of combustion of methane is: CH4(g) + 2O2(g) → CO2(g) + 2 H2O(l) ΔΗ =-890.3 kJ 1. Calculate the AH when 5.00 g CH4 react with excess of oxygen. 2. Calculate AH when 2L CH4 at 49 °C and 782 mmHg react with an excess of oxygen 3. Calculate AH when 2L CH4 react with L O2 in a reaction vessel kept at 49 °C and 782 mmHg.
How many moles of N2 are in a 2.23 L cylinder at 50.2 °C and 4.59 atm? What pressure is exerted by 814.5 g of CH4 in a 0.730 L steel container at 190.8 K?
Consider 5.00 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 3.00 L and the temperature is increased to 40. ∘C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder.
1a) Calculate the Volume in L of 1.2 moles of CH4 confined in a container at a pressure of 10 atm at 323 K. Use the ideal gas equation. C=12 g/mol H= 1 g /mol T(K)= T(°C)+273.15 R=0.0821 L-atm/mol-K PV=nRT answer a)0.318 b)90.2 c)3.18 d)31.8 1b) Is the number of particles or spheres in the cubic cell centered on the body? answer 1)3 2)4 3)1 4)2 3c) in the solid state does it form molecular crystals answer a)NaCL b)graphite c)CO2...
Determine the number of moles of each gas present in a mixture of CH4 and C2H6 in a 2.50-L vessel at 25°C and 1.86 atm, given that the partial pressure of CH4 is 0.67 atm.
Calculate the number of moles in the 1.90 L volume of air in the lungs of the average person. Note that the air is at 37.0°C (body temperature) and atmospheric pressure.