Formula of sodium carbonate is and that of ammonium sulphate is.

${Na}_{2} {CO}_{3}$

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${({NH}_{4})}_{2} {SO}_{4}$

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Solution

The formula of a compound is formed by crossing over the valencies of elements present in the compound.
Hence the formula of sodium carbonate is ${Na}_{2} {CO}_{3}$ and
$S - Na {CO}_{3} ↘ ↙ v - 2 1 Formula - {Na}_{2} {CO}_{3}$
the Formula of ammonium sulphate is ${({NH}_{4})}_{2} {SO}_{4}$
$S - {NH}_{4} {SO}_{4} ↘ ↙ V - 1 2 Formula - {({NH}_{4})}_{2} {SO}_{4}$

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Formula of sodium carbonate is ________and that of ammonium sulphate is________.

The formula of a compound is formed by crossing over the valencies of elements present in the compound.Hence the formula of sodium carbonate is Na2CO3 andS-NaCO3↘↙v-21Formula-Na2CO3 the Formula of ammonium sulphate is (NH4)2SO4S-NH4SO4↘↙V-12Formula-(NH4)2SO4

Formula of sodium carbonate is and that of ammonium sulphate is.