1.

Consider the following sequence of reactions: B_(2)O_(3) + CaF_(2) + H_(2)SO_(4) rarr (A) + (B) + H_(2)O (A) +LiAlH_(4) rarr (C)(g) + (D) + LiF (C) +H_(2)ODeltararr (D) + H_(2) uarr (D) +Na_(2)CO_(3) rarr (E) + NaBO_(2) + CO_(2) uarr (E) +NH_(4)Cl rarr (F) + B_(2)O_(2) + NaCl + H_(2)O The emipirical formula mass of compound (F)

Answer»

25
15
50
117.5

Answer :A


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