Question

a 5.25 g sample of silicon flakes is added to an irregular flask. ethanol, in which the solid si is insoluble, is addedto the flask so that the total volume of solid and liquid together is 15.00 ml. the solid and ethanol togetherweigh 15.50 g. the density of ethanol is 0.807g/ml. what is the density of silicon?

Answer 1

To calculate the density of silicon, subtract the mass of the silicon from the total mass, and subtract the volume of the ethanol from the total volume. Then, use the equation density = mass/volume to calculate the density of silicon.The density is 5.25 g/4.75 mL = 1.105 g/mL.

Step-by-step explanation:

To calculate the density of silicon, we need to find the mass and volume of the silicon sample.

We are given that the total mass of the solid and ethanol together is 15.50 g and the total volume is 15.00 mL.

The mass of the ethanol can be calculated by subtracting the mass of the silicon from the total mass.

So, the mass of the ethanol is 15.50 g - 5.25 g = 10.25 g.

To find the volume of the silicon, we can subtract the volume of the ethanol from the total volume.

Therefore, the volume of the silicon is 15.00 mL - 10.25 mL = 4.75 mL.

Finally, we can use the equation density = mass/volume to calculate the density of silicon.

The density is 5.25 g/4.75 mL = 1.105 g/mL.