For the reaction `SnO_(2(s)) + 2H_(2(g)) hArr 2H_(2) O_((g)) + Sn_((d)) `. Calculate `K_(p)` at 900K, where the equilibrium steam hydrogen mixture was 45% `H_(2)` by volume.
A
`1.49`
B
`1.22`
C
`0.67`
D
none of these
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a
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