Water vapor is on delivered in your room number so you don’t need it for your phone number though you need
Given that the gas is enclosed you know that the number of moles does not change.
Assuming that the piston moves freely, you infere the pressure is constant.
The voume is evidently variable.
Temperature tends to decrease when the gases expands.
Therefore, there are two variables: the volumen and the temperature.
Answser: option 2: temperature and volume.
The answer would be B. <span>One atom of sodium and one atom of fluorine</span>
THE REACTION IS COMBINATION REACTION!
Is this the answer you are looking for CuCO3=> CuO + CO2.
