Question

0.0401 2. What is the mass (g) of a piece of magnesium wire that produces 41.4 mL of hydrogen gas collected over water at 26.0 °C and at a pressure of 752 torr? NG 2 3. How many moles of hydrogen are present in a 37.5-ml sample at 22.0°C and 714 torr? Assume the hydrogen is dry. |NG| 2 4. You collect a sample of hydrogen gas in an inverted buret by displacement of water at 27.0 °C. The buret could not be submerged deep enough in the water bath to equilize pressure. The water level in the buret was 14.83 cm above the water level in the water bath. The volume of gas in the buret was determined to be 32.60 ml. a. If the current atmospheric pressure was 29.45" of Hg, what is the pressure (torr) of dry hydrogen in the buret? NG 2

Answer 1

please don't forget to press thumbs up thanks for posting questions

(12= 1000 me # Volume of H2 = 41.4 me = 0.0414 litse Tempt = 26°C og 26+273.15 = 299.15k Pressure = 752 toss = 752 -0.989 atm AS 760 atm = 760 toss n = PV RT R = gas constont = Or Ö 82 Latm k mol n = 0o 989 atm x 0. 04142 - oooo167 mole 0,082 L atm x 999,15 Кхма 9+ Mg + 2H+ Mg + M2 0.00 167 moles o males as Mg required = Mass Atomic mass of no of male & Mg = - 0000167 mole x 240 gm mole Oo ou of gm = And