Test Preparation on Redox Reaction-II-Chemistry Test Series IIT JEE-2020

1 g of a mixture of NaHCO3 and Na2CO3 is heated to 150ºC .
The volume of the CO2 produced at STP is 112.0 mL. Calculate
the percentage of Na2CO3 in the mixture
(Na = 23,C =12, O =16)

Number of hydrogen ions present in 10 millionth part of
1.33 cm3 of pure water at 25ºC is-