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# Write balanced equations for each of the following by inserting the correct coefficients in the blanks:(a) $_{-}\mathrm{SO}_{2}(g)+_{-} \mathrm{O}_{2}(g) \longrightarrow_{-}\mathrm{SO}_{3}(g)$(b) $_{-}\mathrm{Sc}_{2} \mathrm{O}_{3}(s)+_{-}\mathrm{H}_{2} \mathrm{O}(l) \longrightarrow_{-}\mathrm{Sc}(\mathrm{OH})_{3}(s)$(c) $_{-}\mathrm{H}_{3} \mathrm{PO}_{4}(a q)+_{-}\mathrm{NaOH}(a q) \longrightarrow{_{-}\mathrm{Na}_{2} \mathrm{HPO}_{4}(a q)+}_{-}\mathrm{H}_{2} \mathrm{O}(l)$(d) $_{-} \mathrm{C}_{6} \mathrm{H}_{10} \mathrm{O}_{5}(s)+_{-} \mathrm{O}_{2}(g) \longrightarrow_{-} \mathrm{CO}_{2}(g)+_{-} \mathrm{H}_{2} \mathrm{O}(g)$

## a) $2 \mathrm{SO}_{2}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{g}) \longrightarrow 2 \mathrm{SO}_{3}(\mathrm{g})$b) $\mathrm{Sc}_{2} \mathrm{O}_{3}(\mathrm{s})+3 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \longrightarrow 2 \mathrm{Sc}(\mathrm{OH})_{3}(\mathrm{s})$c)$\mathrm{H}_{3} \mathrm{PO}_{4}(\mathrm{aq})+2 \mathrm{NaOH}(\mathrm{aq}) \longrightarrow 2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})+\mathrm{Na}_{2} \mathrm{HPO}_{4}(\mathrm{aq})$d)$\mathrm{C}_{6} \mathrm{H}_{10} \mathrm{O}_{5}(\mathrm{s})+6 \mathrm{O}_{2}(\mathrm{g}) \longrightarrow 6 \mathrm{CO}_{2}(\mathrm{g})+5 \mathrm{H}_{2} \mathrm{O}(\mathrm{g})$

#### Topics

Chemical reactions and Stoichiometry

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