we sent you a message with a link. By clicking on the link, you will automatically log in to your profile.
Attention! The connection is valid for 15 minutes. The message is sent only if the user with the given username (e-mail address) exists in the database.
You can only unlock the chapter using a special code that we will send you via the Viber app. Receiving a message is free of charge and with no obligations.
My phone number:
Get a code
In compliance with the law, persons under the age of 15 can enter their phone number only in the presence of a parent or guardian.
4-character code:
Check the received code
The page will be refreshed automatically in a few seconds.
To ensure the proper functioning of the website, OpenProf uses cookies that do not store personal data. By continuing to use the website, you agree to cookies. Tell me more »
. The volume of the vessel is 
. The temperature is 
. How many gas molecules are in the container?
is equal to 1.2. The initial mass of the mixture is 10 g. Then, 2 g of hydrogen gas 
is added to the mixture.
of the partial pressures of helium and argon after the addition of hydrogen?
of the partial pressures of helium and hydrogen? Write the result to 3 decimal places.
.
contains 1 kg of oxygen gas, 
, with a molar mass of 
.
?
?
.
.
.
. The average molar mass of air is 29 kg .
and a pressure of 100 bar if the relative molecular mass of air is 29 kg?
. The relative molecular mass of the oxygen molecule 
is 32 kg. What is the pressure in the cylinder?
and the pressure is 0.1 bar. The relative molecular mass of air is approximately 29 kg.
. What is its partial pressure at 
? The relative atomic mass of oxygen is 16 and that of carbon is 12.
and a pressure of 1010 bar. 2 g of water is poured into the container. The water is allowed to evaporate and the temperature drops to 
.
with a relative molecular mass of 28 and 2 kg of oxygen 
with a relative molecular mass of 32 are placed in a 50 l container. The temperature of the container is 
.
of 
gas at temperature 
, is in a bottle of volume 
.
of the gas in the bottle at 
?
, an additional 
of 
after the addition.
.
.
.
.
. The relative molecular mass of water is 18 and the temperature is 
.
and nitrogen 
gases. 55% of the total mass of the mixture is oxygen and 45% is nitrogen. The temperature in the vessel is 300 K and the density of the mixture is 
.
for each gas state in the task.
and oxygen molecules 
. At a temperature of 
and a pressure of 1 bar, the densities of air, nitrogen and oxygen are 
, 
and 
respectively. What is the ratio of the number of oxygen molecules to that of nitrogen molecules in the air?
, we supply various gases stored in separate cylinders. From a cylinder in which oxygen is stored at a pressure of 20 bar and a temperature of 90 ° C, 12 l of oxygen is delivered. 
molecules are introduced from the nitrogen cylinder and 40 kg of gas from the helium cylinder. We also wait for the gases to mix well and stabilize at a temperature of 20 ° C. What is the pressure in the box?
. Assume that all the substance in the bulb is argon gas with a molar mass 
and that the bulb has the shape of a sphere with a radius of 3 cm. When the light is off, the temperature inside the bulb is 300 K.
and the Avogadro constant is 
.
air if the air temperature is 
and the relative humidity is 60%. The saturated vapour pressure is 23.4 mbar and the relative molecular mass of water is 18.
. The pressure and the mass of air in the room are 1.1 bar and 80 kg respectively. The average molar mass of air is 
.
as the gas constant and 
.
is saturated with water vapour. Calculate the density of the saturated air if the total pressure is 1.062 bar. At the given temperature, the saturated vapour pressure is 73.8 mbar, the relative molecular mass of air is 29 and that of water is 18.
. How many more water molecules can pass into the air? The temperature is the same throughout which is 
, and the saturated water vapor pressure at this temperature is 
.
