Which two gaseous giants did Renaissance scientists such as Galileo know about?

One does not belong why? ice, gold ,wood ,diamond and table salt

What produces wave a)sound b) heats c)transfer of energy d)vibrations

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.