# A balloon is inflated with 0.2494 g of helium to a pressure of 1.26 atm. If the desired volume of the balloon is 1.250 L, what must the temperature be in °C?

Approx.

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Use the Ideal Gas Law: (PV = nRT). Convert grams of helium to moles: (n = \frac{0.2494 , \text{g}}{4.0026 , \text{g/mol}}). Rearrange the equation to solve for temperature: (T = \frac{PV}{nR}). Substitute values and solve.

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