please help

Me to solve all this questions. $1)$With the help of a catalyst a mixture of $C{H}_4$ and $H_{2}O$ in a $5\mathrm{.}00L$ container is found to contain $8\mathrm{.}62g$ of $CO,2\mathrm{.}60g$ of $H_2,43\mathrm{.}0g$ of $C{H}_4,$ and $48\mathrm{.}4g$ of $H_{2}O.$ Assuming that equilibrium had been reached, calculate $K_c$ and $K_p$ for the following reaction at $200.C$

$C{H}_4(g)+H_{2}O(g)CO(g)+3H_2(g)$

A $0\mathrm{.}831g$ sample of $S{O}_3$ is placed in a $1\mathrm{.}00L$ container and heated to $1100K.$ The $S{O}_3$ decomposes at that temperature to $S{O}_2$ and $O_2$ :

$2S{O}_3(g)2S{O}_2(g)+O_2(g)$

At equilibrium, the total pressure in the container is $1\mathrm{.}300$atm. Find the values of $K_p$ and $K_c$ for this reaction at $1100K.$

$3.$ Calculate the approximate $pH$ and percent ionization for $0\mathrm{.}010M$ and $0\mathrm{.}75M$ solutions of nitrous acid whose $K_a=4\mathrm{.}5{10}^{-4}$ and determine if the approximate $pH$ calculated in each case is valid.

The approximate $pH$ and percent ionization of a monoprotic weak acid are:

$4.$ Calculate the approximate concentration of sodium acetate $(K_b$~~$5\mathrm{.}6{10}^{-10})$ that would have a $pH=8\mathrm{.}00.$

$5.$ Calculate the $pH$ at the equivalence point of a $25\mathrm{.}0mL$ sample of $0\mathrm{.}10M$ solution hydrofluoric acid $)=(6\mathrm{.}8{10}^{-4}$ that is neutralized by $40\mathrm{.}0mL$ of sodium hydroxide.

$6.$ Imagine mixing $40\mathrm{.}0mL$ of $0\mathrm{.}20M$ lactic acid $)=(1\mathrm{.}4{10}^{-4}$ with $60\mathrm{.}0mL$ of $0\mathrm{.}15M$ sodium lactate to make $100\mathrm{.}0mL$ of buffer solution. Calculate the $pH$ of this buffer.