How are 0.50 mol `Na_2Co_3` and 0.50 M `Na_2Co_3` different?

How many mL of 0.1 M HCl are required to react completely with 1g mixture of Na_2CO_3 and NaHCO_3 containing equimolar amounts of both?

How will you prepare: Na_2Cr_2O_7 from Na_2CrO_4 ?

Which of the following pairs will have greater conduction ? 0.1M NaCl solution at 25^@C and 0.1M NaCl solution at 50^@C .

What does it means, 5% Na_2CO_3 solution (w//w) ?

State as to why (a) a solution of Na_2CO_3 is alkaline.

What is the oxidation state of Fe in K_4[Fe(CN)_6] and Co in Na[Co(CO)_4] ?

What is the mass of 10 moles of sodium sulphite (Na_2SO_3) ?

Calculate the formula unit masses ofZnO, Na_2O, K_2CO_3 , given atomic masses of Zn = 65u, Na = 23u, K = 39u, C =.12u, and O = 16u.

Find the magnitude of emf induced in a 200 turn coil with cross sectional area of 0.16 m if the magnetic field through the coll changes from 0.10 weber/m2 to 0.50 weber/m^2 at a uniform rate over a period of 0.02 second.