11. A sample of hydrogen gas made in a lab is at 774 mmHg and 18.0c...
A gas sample has an initial pressure of 586 mmHg and an initial volume of 0.535 L . What is the pressure (in atm) when the volume of the sample is decreased to 240 mL ? (Assume constant temperature and constant number of moles of gas?
POST-LABORATORY QUESTIONS (Show your calculations). 1. A sample of gas weighs 3.10 g and occupies a volume of 1.272 ml at 30 °C and 720 mm Hg. What is the molar mass of the gas? 2.3 moles of hydrogen occupy a volume of 67.20 L, at standard temperature and pressure (STP. 0 °C and 760 mmHg). What is the density of hydrogen at STP? 3.2.5 moles of gas, at 1590 mmHg, occupy a volume of 28.00 L. What is the...
QUESTION 3 A student collected a sample of hydrogen gas in a eudiometer over a water bath to experimentally determine the value of the gas constant, R. Calculate the experimental value of Rif the pressure of the gas was 0.991 atm, the volume was 36.3 mL the temperature was 292 K and the sample contained 1.54 x 103 moles of gas. QUESTION 4 A student collected a sample of hydrogen gas in a eudiometer over a water bath. The atmospheric...
Experiment 12: Generating Hydrogen Gas Post-lab 1. A sample of potassium chlorate is heated, and decomposes according to the balanced chemical equation shown below. 2 KC1O36) ► 2 KCI) + 3 02 (3) A 0.728 g sample of KCIO, produces 216 mL of oxygen gas collected over water at 22C and an atmospheric pressure of 762 mmHg. Determine the actual yield, theoretical yield, and percent yield of oxygen gas:
Experiment 12: Generating Hydrogen Gas Data: A. Percent yield of hydrogen gas Mass of magnesium 0.04298 Volume of H2 gas (actual) 42.ml 0.0426 24.0°C 297 Temperature of H, gas Atmospheric pressure (see barometer) 765.8 mmHg a2.4 mmHg Vapor pressure of water Partial pressure of Hą gas 743.4 mmHg 0.976 1 atm Calculate the moles of hydrogen gas that should have been produced, starting with the mass of Mg and using the balanced equation. mg = 24.31 Mg(s) + 2 HCI...
A 7.19−g sample of a Cu-Zn alloy reacts with HCl acid to produce hydrogen gas. If the hydrogen gas has a volume of 1.77 L at 22° C and 767 mmHg, what is the percent of Zn in the alloy? %
A sample of hydrogen is collected over water at a temperature of 230C. The pressure inside the tube is determined to be 689 mmHg, and 12.10 mL of gas has been collected. What would the volume of collected hydrogen be at STP? a weird lab decided to use glycerin, a liquid with a density of 1.260 g/mL. If the water level inside the tube was 12.31 cm higher than outside the tube, and the atmospheric pressure measured 728 mmHg, what...
A sample of Ne gas has a pressure of 694 mmHg with an unknown volume. The gas has a pressure of 385 mmHg when the volume is 489 mL, with no change in temperature or amount of gas.
The pressure on a sample of an ideal gas is increased from 715 mmHg to 3.55 atm at constant temperature. If the initial volume of the gas is 474.0 mL, what is the final volume (mL) of the gas?
A sample of hydrogen gas collected at a pressure of 1.27 atm and a temperature of 27.0°C is found to occupy a volume of 28.5 liters. How many moles of gas are in the sample?