Part A A weather balloon has a volume of 890 LL when filled with helium at 9 ∘C∘C at a pressure of 320 Torr.  What is the final volume, in liters, of the balloon, where the pressure is 0.23 atmatm and the temperature is -25 ∘C∘C, when nn does not change?   Express your answer to two significant figures and include the appropriate units.     Part B    In 1783, Jacques Charles launched his first balloon filled with hydrogen gas, which he chose because it was lighter than air. The balloon, which had a volume of 31 000 LL at STP, reached an altitude of 1000 mm, where the pressure was 663 mmHgmmHg and the temperature was -3 ∘C∘C.

A balloon is filled with a gas to a certain volume at a certain pressure at 43.6°C. If the pressure exerted on the balloon is doubled, what must the temperature (in °C) be so that the volume of the balloon doesn't change. (MTS 1/29/2018)

Use Avogadro's law to calculate volume. A sample of gas contains 0.180 mol of N₂(g) and 0.360 mol of O₂(g) and occupies a volume of 26.0 L. The following reaction takes place: N₂(g) +20₂(g) 2NO₂(g) Calculate the volume of the sample after the reaction takes place (assume temperature and pressure are constant).

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the CO₂ gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 103. mL. g 0 collected gas X water ال Calculate the mass of CO₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. chemical reaction Sketch of a gas-collection apparatus