What are the main states of matter?

The water having more dissolved $O_{2}$ is:

Calculate the partial pressure exerted by dioxygen from a mixture of $32 \ g$ $O_2$,$80 \ g$ $Ar$ (molar mass $40 \ g/mol$) and $4 \ g$ dihydrogen $(P_{\text{total}} = 10 \ bar)$. (in $bar$)

What is the relationship between viscosity and pressure?

To which of the following gaseous mixtures is Dalton's law of partial pressures not applicable?

The rate of diffusion of a gas is ..... times that of hydrogen. (Molecular weight = $98$)