1. What is the final pressure of 448 mm Hg of argon gas at 72.1°C if the gas is
ID: 559946 • Letter: 1
Question
1. What is the final pressure of 448 mm Hg of argon gas at 72.1°C if the gas is heated to 202.7°C? Assume the volume and the amount of gas are held constant.
2. N2(g) + H2(g) --> N2H4(l)
Consider the above unbalanced equation. What volume of H2 at 832 mm Hg and 15.2°C is needed to react with 184 mL of N2 at 705 mm Hg and 21.1°C? Provide answer in mL
3. NH3(g) + O2(g) --> NO2(g) + H2O(g)
Consider the above unbalanced equation. What volume of NH3 at 876 mm Hg and 15.8°C is needed to react with 183 mL of O2 at 781 mm Hg and 21.1°C? Provide answer in mL!
4. What is the final volume of 579 mL of neon gas at 227.9°C if the gas is cooled to 70.8°C? Assume the pressure and the amount of gas are held constant.
5. What is the pressure of 148 mL of oxygen gas at 11.9°C and 305 mm Hg if the conditions are adjusted to 369 mL and 133°C? Assume the amount of gas is held constant.
Explanation / Answer
1)
we have:
P1 = 448 mmHg
T1 = 72.1 oC
= (72.1+273) K
= 345.1 K
T2 = 202.7 oC
= (202.7+273) K
= 475.7 K
we have below equation to be used:
P1/T1 = P2/T2
448 mmHg / 345.1 K = P2 / 475.7 K
P2 = 618 mmHg
Answer: 618 mmHg
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