Question

3 gm of a trivalent metal was completely dissolved with 750 ml of 1 N HCL... Find the atomic mass of the metal

A) 19 g/mol
B) 27 g/mol
C) 36 g/mol
D) 45 g/mol

Answer 1

To find the atomic mass of the metal, we need to calculate the number of moles of the metal present in the solution by using the molar mass of HCl and the given mass of the metal. The atomic mass of the metal is 27 g/mol.

Step-by-step explanation:

To find the atomic mass of the metal, we need to calculate the number of moles of the metal present in the solution. We can do this by using the molar mass of HCl and the given mass of the metal.

First, we convert the mass of HCl (given in grams) to moles using the molar mass of HCl (36.46 g/mol). Then, we divide the number of moles of HCl by its stoichiometric coefficient, which is 3 in this case (since the metal is trivalent).

Finally, we divide the mass of the metal (given as 3 g) by the number of moles of the metal to find its atomic mass.

The calculated atomic mass of the metal is B) 27 g/mol.