Answer:
D. 3.699 g/mL
Explanation:
Density of liquid X = 3.0771
Percentage composition of X in the mixture = 32.77% = 0.3277
Density of liquid Y = 4.0017
Percentage composition of Y in the mixture = 67.23% = 0.6723
Density of mixture of X and Y = (density of X × percentage composition of X) + (density of Y × percentage composition of Y)
Density of mixture of X and Y = (3.0771 × 0.3277) + (4.0017 × 0.6723)
Density of mixture of X and Y = 1.0084 + 2.6903
Density of mixture of X and Y = 3.6987 g/mL
When the metal of unknown density is dropped into a mixture of X and Y, it is suspended in the mixture. This is because it has a density equal to that of the mixture.
Therefore, the density of the unknown metal is 3.6987 g/mL which is approximately 3.699 g/mL to three decimal places.
