Final answer:
The mass of 0.25 L of a substance with a density of 1.63 g/mL is 0.4075 g.
Step-by-step explanation:
The mass of 0.25 L of a substance can be calculated using the formula:
Mass (g) = Volume (L) x Density (g/mL)
So, for this question, the mass would be:
Mass (g) = 0.25 L x 1.63 g/mL = 0.4075 g
Learn more about mass calculation