Calculate the weight of NaOH required to neutralise 25mL of `1MH_2SO_4`?

Molecular weight of oxalic acid is 126 the weight of oxalic acid required to neutralise 1000ml of normal solution of NaOH is :

During estimation of nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.5 g of the compound in Kjeldahl's estimation of nitrogen, neutralised 10mL of 1 M H_2SO_4 . Find out the percentage of nitrogen in the compound.

The volume of 0.1 M H_2SO_4 required to neutralise 30 ml of 2.0 M NaOH is :

Calculate the volume of oxygen at NTP is required to cause complete combustion of 100 ml of ethylene at NTP. Also calculate the volume of CO_2 formed at NTP.

Calculate the mass of iron required to be converted into its oxide (Fe_3O_4) by the action of 23.4 g of steam on it .

Calculate the number of molecules present in 4 gms of NaOH.

What is the weight of oxygen that is required for the complete combustion of 2.8 kg of ethylene :

Calculate the amount of H_2SO_4 present in 2lit of 0.5M solution.