A certain mass of dry gas at `27^(@)C` and `760 mm` pressure has density `28`. What will be its density at `7^(@)C` and `740 mm`?

Explanation

Given
`d_(1)=28`
`P_(1)=760 mm`
`T_(1)=27^(@)C=300.15 K`
`d_(2)=?`
`P_(2)=740 mm`
`T_(2)=280.15K`
`:. (d_(1))/(d_(2))=(P_(1)xxT_(2))/(T_(1)xxP_(2))`
`:. D_(2)=(d_(1)xxT_(1)xxP_(2))/(P_(1)xxT_(2))=(28xx300.15xx740)/(760xx280.15)=29.21`