Calculate the concentration in g/dm3 of HNO3 in solution A.

(H=1; N=14; O=16; Na=23)

To calculate the concentration of HNO3 in solution A in g/dm3, we need to know the amount of HNO3 in the solution and the volume of the solution.

First, we need to determine the molar mass of HNO3. HNO3 consists of one hydrogen atom (H), one nitrogen atom (N), and three oxygen atoms (O).

The molar mass of HNO3 can be calculated as follows:
Molar mass of HNO3 = (atomic mass of H) + (atomic mass of N) + 3*(atomic mass of O)

Given atomic masses:
Atomic mass of H = 1 g/mol
Atomic mass of N = 14 g/mol
Atomic mass of O = 16 g/mol

Molar mass of HNO3 = (1 g/mol) + (14 g/mol) + 3*(16 g/mol)
= 1 g/mol + 14 g/mol + 48 g/mol
= 63 g/mol

The molar mass of HNO3 is 63 g/mol.

Next, we need to know the amount of HNO3 in the solution. This can be determined by knowing the number of moles of HNO3 present and the volume of the solution.

Lastly, we need the volume of the solution in dm^3.

With this information, we can calculate the concentration of HNO3 in g/dm3 using the formula:

Concentration (g/dm3) = (Amount of substance (mol) / Volume (dm3)) * Molar mass (g/mol)

Please provide the number of moles of HNO3 present in the solution and the volume of the solution in dm3, so we can calculate the concentration.