Question

Calculate number of moles of Na2SO4 produced from 1 mole of NaOH?​

Answer 1

1 mole of Na2SO4 is produced by 2 moles of NaOH.

∴ No. of moles of Na2SO4 produced by 1 mole of NaOH=21 moles.

Hence, half mole of Na2SO4 nis produced by 1 mole of NaOH.

Answer 2

Answer:-

The chemical equation:-

$\boxed{\sf {CaCO_3\atop 1mol(100g)}\longrightarrow CaO+{CO_2\atop 1mol(44g)}}$

Now

$\\ \sf\longmapsto Pure\:CaCO_3=\dfrac{40\times 20}{100}$

$\\ \sf\longmapsto Pure\:CaCO_3=8g$

From equation:-

$\\ \sf\longmapsto 100g\:of\:CaCO_3\:gives\:CO_2=44g$

$\\ \sf\longmapsto 8g\:of\:CaCO_3\:gives\;CO_2=\dfrac{44}{100}\times 8=3.52g$