What mass of He could be contained in a vessel that can holds 4.48 litre of SO2 at STP? Options: 0.9 g 1.6 g 2.8 g 0.8 g

Q. What weight of hydrogen at STP could be contained in a vessel that holds $3.36L{O}_2$ gas at STP?

Q. What weight of hydrogen at STP could be contained in a vessel that holds 4.8 g oxygen at STP?

Q. What weight of $H_2$ NTP could be contained in a vessel that holds 4.8 gm $O_2$ at NTP?

Q. A reaction system in equilibrium according to the equation $2S{O}_2+O_2\rightleftharpoons 2S{O}_3$ in 1 litre reaction vessel at a given temperature was found to contain 0.11 mol of $S{O}_2$, 0.12 of $S{O}_3$ and 0.05 mol of $O_{2.}$ Another 1 litre reaction vessel contains 64 g of $S{O}_2$ at the same temperature. What mass of $O_2$ must be added to this vessel in order that at equilibrium half of $S{O}_2$is oxidised to $S{O}_3$?

Q. A reaction system in equilibrium according to reaction : ${2SO}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons {2SO}_3\left(g\right)$ in one litre vessel at a given temperature was found to be $0.12$ mole each of ${SO}_2$ and ${SO}_3$ and $5$ mole of $O_2$. In another vessel of one litre contains $32$g of ${SO}_2$ at the same temperature. What mass of $O_2$ must be added to this vessel in order that at equilibrium $20$% of ${SO}_2$ is oxidised to ${SO}_3$: