Chemistry
Grade-9
Easy
Question
At fixed temperature and 800mm pressure, the density of a gas is 40. At the same temperature and 400mm pressure, what is the density of the gas?
- 60
- 20
- 70
- 50
Hint:
Use boyle's law.
The correct answer is: 20
The correct option is b)20.
According to the boyle's law Pressure is indirectly proportional to volume.
Also density = 
Given,
Initial pressure = P1=800 mm
Initial density= D1=40
Final pressure = P2 = 400 mm
To find final density:
Now, combining these both,
The correct option is b)20.
According to the boyle's law Pressure is indirectly proportional to volume.
Also density =
Given,
Initial pressure = P1=800 mm
Initial density= D1=40
Final pressure = P2 = 400 mm
To find final density:
Now, combining these both,
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