A flask weighs 76.83 g when filled with Br and 55.63 g when filled with water (d- 1.00 g/cm3) How much does the flask weigh empty?
To find the weight of the empty flask, we need to subtract the weight of the water or Br from the total weight of the flask when it is filled.
Let's denote the weight of the empty flask as x.
When the flask is filled with water, it weighs 55.63 g.
When the flask is filled with Br, it weighs 76.83 g.
Since the density of water is 1.00 g/cm³, we can convert the weight of the water to volume using the equation: weight = density x volume.
So, the weight of the water is equal to the volume of water.
Therefore, the volume of water = 55.63 cm³.
Similarly, we can find the volume of Br in the flask:
weight of Br = density x volume of Br
76.83 g = density x volume of Br
We do not know the density of Br, but we know that Br and water have different densities. Therefore, the volumes of water and Br must occupy the same space inside the flask. Hence, their combined volume should be equal to the volume of the flask.
So, volume of water + volume of Br = volume of flask
55.63 cm³ + volume of Br = volume of flask
Now, we can find volume of Br:
volume of Br = volume of flask - volume of water
Next, we need to find the weight of the flask when it is empty:
weight of empty flask = weight of Br - weight of Br
So, we subtract the weight of the Br from the weight of the flask filled with Br:
weight of empty flask = 76.83 g - (volume of Br x density of Br)
Finally, we substitute the values we know:
weight of empty flask = 76.83 g - ((volume of flask - volume of water) x density of Br)
Unfortunately, the question does not provide the density of Br, so we cannot determine the weight of the empty flask without this information.