A is a solution containing 1.25 g/mol, at 250cm³ of HNO3, Solution B is a solution of X2CO3.H42O with the concentration of 10.2g/dm³, Calculbte? 10.2gldm-3 Calculate the Concentration, in moldm³ of B . Calculate the molar mass of B. calculate the Atomic number of X. calculate the percentage mass of X In X2CO3.4H2 ​