2. With the given information: i) State the gas law that can be used and ii) Solve for the unknown. a. If a 425mL of He gas is cooled from 76°C to 22°C, what is the new volume of the gas? Gas Law: Solve for the Unknown: b. The new pressure of a gas when it expands to 1.25L when originally 235mL and 5.34atm. Gas Law: Solve for the Unknown: C. If 23.4grams of Argon is at a volume if1.35L, what volume will the same mass of Cl2 gas take up given that all other conditions are the same? (hint for this one-compare moles) Gas Law: Solve for the Unknown: d. If 464mL of an ideal gas is at 27°C and 1.05atm, what will be new volume at STP? Gas Law: Solve for the Unknown:

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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.