Can sound travel throug gases eisier then liquids

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

Of is j/kg·k. if a 2.6 kg of isk to k, is ?

Which of these is the best way to manage a natural resource