Chemistry
Grade-9
Easy
Question
A certain amount of gas at 25oC and 76cm Hg occupies a volume of 12.0L. What will be the pressure at a height where the temperature is 10oC and the volume is 12.8L?
- 67.66 cm
- 67 cm
- 85 cm
- 87 cm
Hint:
Use combined gas law.
The correct answer is: 67.66 cm
Let,
Pa = 76 cm Hg and Pb is unknown.
Va = 12 L and Vb = 12.8 L
Ta = 25°C = 298 K and Tb = 10°C = 283 K
Pb = 67.66 cm Hg
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