For the reaction `A(s)+2B(g)rarr3C(g)+D(g)`
Molar mass `[g mol^(-1)] A = 100, B = 50, C = 60, D = 20`
(a) How many grams of `C` are produced by reaction of `250g A` ? [Hint : Mass relation]
(b) What mass of `B` reacts to give `500g D`
(c) How many grams of A will produce `11.2L` of `C` at `STP` ? .

Explanation

`{:(A(s),+,2B(g),rarr,3C(g),+,D(g)),((250)/(100) = 2.5 mol,,"excess",,7.5mol,,):}`
`= 7.5 xx 60 g`
`= 450gm`
`{:((b)A(s),+,2B(g),rarr,3C(g),+,D(g)),(,,50 mol,,(500)/(20) = 25 mol,,):}`
`= 50 xx 50`
`= 2500 gm`
(c ) [Hint : mass-volume relation]
`{:(A(s),+,2B(g),rarr,3C(g),+,D(g)),(,,(0.5)/(3) mol,,(11.2)/(22.4) = 0.5 mol,,):}`
`= (0.5)/(3) xx 100`
`= 16.67 gm`