Question

It's answer is .1 mole

Answer 1

2moles ofNaHco3 gives rise to 1 mole of Na2co3 and 1mole of co2 and 1 mole of H2o

That is

2moles of NaHco3 gives 1mole of co2

0.2 moles of NaHco3 gives x moles of co2

X=0.2/2=0.1

Hope u understand