Final answer:
To find the mass of nickel sulfate (NiSO₄) in a 6.00% solution, we use the definition of mass percent, resulting in a mass of 1.20 g of NiSO₄ in a 20.0 g solution.
Step-by-step explanation:
The question is asking us to calculate the mass of nickel sulfate (NiSO₄) in a 20.0 g solution that has a concentration of 6.00%. To find the mass of the solute, we can use the definition of mass percent, which is:
mass percent = (mass of solute / mass of solution) x 100%
Applying this to the given information:
6.00% = (mass of NiSO₄ / 20.0 g) x 100%
From this equation, we can solve for the mass of NiSO₄:
mass of NiSO₄ = (6.00 x 20.0 g) / 100 = 1.20 g
The correct answer is a) 1.20 g.