4

# 5.At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volmes of C and 1 volume. A combine with one volume of B to form 2 volumes of D. The formula of C is

${A}_{3}{B}_{6}$

$\sqrt{AB}$

${A}_{2}{B}_{5}$

$A{B}_{5}$

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