Q. 35.0( 1 Vote )

Sodium bi carbonate breaks down on heating:

2NaHCO3 Na2CO3 + H2O + CO2

(Atomic mass of Na = 23, C = 12, H = 1, O=16)

i) How many moles of sodium bi carbonate are there in the equation?

ii) What is the mass of sodium bicarbonate used in this equation?

iii) How many moles of carbon dioxide are there in this equation?

Answer :

(i) Two (coefficient of sodium bi carbonate)


(ii) 1 mole of sodium bi carbonate contains 84 grams. Two moles of


sodium bi carbonate contains 168 grams. So, 168 grams of sodium bi carbonate is used in the equation.


(iii) 1 mole (coefficient of CO2 )


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