Thanks for the enriching discussion. since 6.9 g of s are 250 cm3 is it wrong to say the molarity is 6.9 x4 (250 x4) so as to get 27.6 g/litres as the molarity of S?

Answer 1

Yes, it is incorrect to calculate the molarity by simply multiplying the concentration by a factor of 4. Molarity, denoted by M, is calculated by dividing the amount of solute (in moles) by the volume of the solution (in liters).

To find the molarity of S in this case, you would first need to convert the mass of sulfur to moles by dividing by the molar mass of sulfur. The molar mass of sulfur is approximately 32 g/mol.

6.9 g of S ÷ 32 g/mol = 0.2156 moles of S

Then, you would divide the moles of sulfur by the volume of the solution in liters:
0.2156 moles ÷ 0.250 L = 0.8624 M

So, the molarity of S in this case is 0.8624 M, not 27.6 g/L.