Chemistry

Grade-9

Easy

Question

# A certain quantity of gas occupies a volume of 84 cm^{3} at a pressure of 920 mm. What will be the volume of gas when pressure decreased to 620 mm of the gas at constant temperature.

- 128.25 cm
^{3} 142.54 cm^{3}

124.64 cm^{3}

134.45 cm^{3}

^{3}142.54 cm^{3}

124.64 cm^{3}

134.45 cm^{3}

Hint:

### If initial pressure and volume is multiplied it is equal to product of final pressure and volume.

## The correct answer is: 124.64 cm^{3}

^{3}

### The correct option is c)124.64 cm3 .

84 cm3 at a pressure of 920 mm. What will be the volume of gas when pressure decreased to 620 mm

P1 = 920 mm

V1 = 84 cm3

P2 = 620 mm

V2 = ?

920 x 84 = 620 x V2

V2 =

V2 = 124.6451

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