Question

A glass vessel that can be repeatedly filled with precisely the same volume of liquid is called a pycnometer. A certain pycnometer, when empty and dry, weighed 25.296 g. When filled with water at 25 oC the pycnometer and water weighed 34.914 g. When filled with a liquid of unknown composition the pycnometer and its contents weighed 33.485 g. At 25 oC the density of water is 0.9970 g/ml. What is the density of the unknown liquid?

Answer 1

Answer:

density of liquid 0.848 g/ml

Explanation:

from the information given in the question

mass of water = 34.914 - 25.296 = 9.618 g

volume of pycnometer = volume of water

which will be equal to $= \frac{ mass}{density}$

$= \frac{9.618}{0.9970} = 9.646 ml$

mass of liquid =33.485-25.296 = 8.189 ml

density of liquid$= \frac{mass}{volum\ of\ liquid}$

                           = $\frac{8.189}{9.646} =0.848 g/ml$