*** 21 - Calculate R from student collected data and percent error A student weighs out 0.0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32.0°C. The volume of collected gas is 43.9 mL and the atmospheric pressure is 832 mmHg. Using the experimentally collected data, calculate R and the percent error. Water Vapor Temperature Pressure (8Hww) 25.2 26 28.3 31.8 30 32 34 39.9 44.6 Ideal gas constant from literature: L·atm %3= L'atm 0.08206 mol K Percent error= < Prev 4 of 4 Next > www. EGO 08 F5 93

A mixture of methane and krypton gases is maintained in a 9.28 L flask at a pressure of 3.79 atm and a temperature of 54 °C. If the gas mixture contains 14.4 grams of methane, the number of grams of krypton in the mixture is  ______g.   The stopcock connecting a 1.10 L bulb containing carbon dioxide gas at a pressure of 6.01 atm, and a 4.66 L bulb containing helium gas at a pressure of 1.70 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is ______ atm.

A 135.0 L weather balloon filled with 6.40 mol of helium has a small leak. If the helium leaks at a rate of 10.0 mmol/hr, what is the volume of the balloon after 69.0 hours? L

4 Water Vapor A student weighs out 0.0422 g of magnesium metal. The magnesium metal is reacted with excess hydrochloric acid to produce hydrogen gas. A sample of hydrogen gas is collected over water in a eudiometer at 32.0°C. The volume of collected gas is 43.9 mL and the atmospheric pressure is 832 mmHg. Using the experimentally collected data, calculate R and the percent error. Temperature °C Pressure (mmHg) 26 25.2 28 28.3 30 31.8 32 35.7 34 39.9 36 44.6 Ideal gas constant from literature: L'atm R= mol·K L'atm 0.08206 mol·K Percent error = %

Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres. Be sure your answer has the correct number of significant digits.

If 7.5 L of ethane (C₂H6) form in a reaction between 30 L of acetylene gas (C₂H₂) and an unknown amount of hydrogen gas at a constant pressure and temperature, what is the minimum amount of hydrogen gas that must have reacted? Select the correct answer below: 7.5 L 15 L 30 L Q 45 L

A colleague of yours takes a bunch of pressure readings while you are gone. You return to realize that he has invented a new unit: his body mass of 180lb per 1mile?. He calls this unit Bob per Bob's Block. 1mile = 63360 inches. What is the pressure of 9 Bobs per Bob's block in a real unit of pressure, pounds per square inch (PSI)? Use just one sig fig in your answer: x10^ PSI

Please help me solve part A&B. Thank you.

Hydrogen gas is produced when magnesium metal reacts with hydrochloric acid. In the lab, a student collects 0.002581 g of hydrogen gas over water in a eudiometer at 23°C. The atmospheric pressure is 794 mmHg. What volume (in mL) of dry hydrogen gas would be collected? Water Vapor Temperature °C Pressure (mmHg) 19 16.5 21 18.7 Volume of dry gas = mL 23 21.1 25 23.8 27 26.7 29 30.0

The atmospheric pressure in a laboratory where gases are being prepared is 752.6 mm Hg, and the temperature of the water being used is 20 °C. In this lab, a sample of hydrogen gas is collected in a bottle from a chemical reaction. What is the pressure of the hydrogen gas in the bottle? (Show Work)