Ammonia gas has a molar mass of approximately 17 grams per mole. At 290K and 1.2 atm, a sample of ammonia has a volume of 3.7 L.
In three to five sentences, explain how you can find the mass of the ammonia. Then, given R=0.0821L⋅atmmol⋅K, calculate the mass.
1 answer
To find the mass of the ammonia gas, you can first calculate the number of moles of ammonia using the ideal gas law equation: PV = nRT. Rearrange the equation to solve for n (number of moles): n = PV / RT. Then, multiply the number of moles by the molar mass of ammonia to obtain the mass. With the given values, the number of moles of ammonia can be calculated as: n = (1.2 atm * 3.7 L) / (0.0821 L⋅atmmol⋅K * 290K) = 0.176 moles. Finally, multiply the number of moles by the molar mass (17 grams/mole) to find the mass: 0.176 moles * 17 grams/mole = 2.992 grams.