# hydrogen gas formula

Dalton's law of partial pressure (article) | Khan Academy » Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere. Khanacademy.org

Sodium metal reacts with water to produce hydrogen gas according to the following equation: 2Na(s) + - brainly.com » 0.708 moles of Na react with water to produce 8.77 L of H₂ collected over water at 20 °C and 754 mmHg . Sodium metal reacts with water to produce hydrogen gas … Brainly.com

Given the following, what is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 3.8 mm Hg? | Socratic » P_"Total"=P_"Gas"+P_"SVP"="742 mm Hg" And P_"SVP" is the so called "saturated vapour pressure", which for this experiment = "3.8 mm Hg" So P_"dihydrogen" = "742 mm Hg "-" 3.8 mm Hg = 738.2 mm Hg". Note that here the quoted value of P_"SVP" is wrong. I suspect that they got confused with respect to a pressure measurement in "mm Hg" and "Pascal". The vapour pressure of water at 298*K is "24 mm Hg". Socratic.org

Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 46.5 mL of hydrogen gas over water at 27 degrees Celsius and 751 mmHg. How many grams of aluminum reacted? The partial pressure of water at 27 C is 26.8 mmHg. | Socratic » 0.0324 "g Al" We're asked to find the number of grams of "Al" that reacted, given some "H"_2 (g) product characteristics. Let's first write the chemical equation for this reaction: 2"Al"(s) + 6"HCl"(aq) rarr2 "AlCl"_3(aq) + 3"H"_2 (g) The total pressure of the gaseous system is given as 751 "mm Hg", and the partial pressure of water vapor is 26.8 "mm Hg" at 27^"o""C". The pressure of hydrogen gas is thus P_"total" = P_ ("H"_2"O") + P_ ("H"_2) P_ ("H"_2) = 751 "mm Hg" - 26.8 "mm Hg" = color(red)(724 color(red)("mm Hg" This pressure in atmospheres is 724cancel("mm Hg")((1color(white)(l)"atm")/(760cancel("mm Hg"))) = color(red)(0.953 color(red)("atm" We'll now use the ideal gas equation to find the number of moles of "H"_2 formed: (T = 27^"o""C" + 273 = 300 "K") n = (PV)/(RT) = ((color(red)(0.953)cancel(color(red)("atm")))(0.0465cancel("L")))/((0.082057(cancel("L")•cancel("atm"))/("mol"•cancel("K")))(300cancel("K"))) = color(green)(0.00180 color(green)("mol H"_2 (volume converted to liters here) Using the co Socratic.org