The volume of a gas is 3.0 L, the pressure is 1.0 atm, and the temperature is 300 K. A chemist changes one factor while keeping another constant so that the new volume is 2.0 L. Which of the following could be the new conditions? O The final pressure is 0.5 atm, while temperature is kept constant. O The final temperature is 200 K, while pressure remains constant O The final pressure is 0.2 atm, while temperature is kept constant. O The final temperature is 350 K, while pressure remains constant.

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.