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A properly prepared Dewar flask can contain liquid air, or any other liquid that needs shielding from ambient heat at standard temperature and pressure to avoid being evaporated.

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Where is the liquid air stored?

In cryogenic laboratories in presence of liquid nitrogen as a coolant. ---------------------------------------- Or perhaps in a vacuum-insulated container caled a "Dewar".


How did James dewar invent the vacuum flask?

During an experiment, James Dewar formed a brass chamber that he enclosed in another chamber to keep the palladium at its desired temperature. He evacuated the air between the two chambers, and through the need for this insulated container, he created the vacuum flask.


When all the liquid has evaporated the vapor totally fills the florence flask and exerts a pressure equal to the atmospheric pressure why?

I'm guessing you are analyzing an experiment where you are determining the molecular mass of an organic liquid. You heated the flask and the liquid evaporated filling the flask, but escaping through a small hole in the covering. 1. Gases always fill the container. So, if the liquid evaporated and formed a gas (vapor), it filled the flask, 2. The pressure on the outside the flask is air pressure. since the vapor isn't pushing off the cover, the pressure is not higher than the air pressure. But since the extra escaped, it cannot be less than the air pressure. Therefore, it is the same.


Why does the egg go in to the flask when heated?

When an egg is heated, the protein present within it(the egg white), called albumin gets denatured. This is because protein structures break at high temperatures. As a result, the liquid albumin forms a thick white mass.


What gas besides air is in the flask when it is upside.down in the sink of cold water?

The gas trapped in the flask when it is upside-down in the sink of cold water is likely water vapor that has condensed from the surrounding air. As the air inside the flask cools, the water vapor condenses into liquid water, creating a partial vacuum that prevents water from entering the container.


If you cool a flask to -200degrise what would happen to the air?

I the flask was sealed, the air inside of the flask would take up less space and as a result, cause a drop in pressure inside the flask.


How would I calculate the mass of air in an empty flask?

From the volume of the flask, and the density of air under the conditions in the room, you can calculate the mass of air. The density of air varies with pressure, temperature, humidity, etc. At sea level and at 15 °C air has a density of approximately 0.001225 g/ml, so under these conditions, a liter flask would contain (1000 ml)(0.001225 g/ml) = 1.225 g of air.


Why is the student unable to blow up a balloon in the flask?

The student is unable to blow up a balloon in the flask because there is already air present in the flask, creating a high pressure environment. When the student tries to blow air into the flask, the pressure inside the flask increases, making it difficult for air to enter and inflate the balloon.


Sam filled a 500ml conical flask with 200ml of water Then he attached a 100ml syringe full of air to the conical flask and pushed the plunger inwards What was the volume of air in the flask?

The total volume in the flask is 500ml of water + 100ml of air from the syringe, which equals 600ml. Since the 200ml of water takes up space in the conical flask, the remaining volume for air is 400ml.


Why was it important to determine the mass of the air in the flask?

Determining the mass of the air in the flask allows for the calculation of the density of air, which is important in various scientific and engineering applications. It also provides insight into the composition and properties of the gas inside the flask.


Do air particles change size or shape when air is removed from a flask?

No.


Why did the water rush into the erlenmeyer flask when it was submerged in the cold water?

1. When the flask was placed into the cold water, the colder air molecules in the flask move slower, putting out less pressure. With the decrease in air pressure inside the flask, the now greater pressure outside pushes water into the flask until the pressure inside equals the pressure outside.