0.0453 moles of hydrogen gas were produced by the reaction. Calculate the volume of the gas at standard temperature and pressure. Mg + 2HCI→ MgCl₂ + H₂ Volume H₂= [?]L Liters of H₂ Enter

Zn reacts with hydrochloric acid to give zinc chloride and hydrogen gas. A sample of 5 g of a Zn mineral requires 10 mL of commercial HCl of 37% purity, by weight and density 1.19 g/mL, to react completely. Find: a) The mass of zinc contained in the sample. b) The purity of the zinc mineral. c) The pressure exerted by the hydrogen gas collected in a 2 L container and at a temperature of 20ºC.please use conversion factors and mark the solutionsThe solutions should be : 3,92 g; 78,4%; 0,72 atm.I just dont know how to do it

8. For the reaction 2H₂O(1) + 2e¯ → H₂(g) + 2OH(aq), calculate the volume of "dry" hydrogen gas created at a pressure of 745 mm Hg and 25.0 °C when 0.6696 g H₂O are used. The vapor pressure of water at this temperature is 23.8 mmHg. A) 0.479 L B) 0.464 L C) 0.450 L D) 4.18 L E) 4.05 L

A reaction between liquid reactants takes place at 18.0 °C in a sealed, evacuated vessel with a measured volume of 45.0 L. Measurements show that the reaction produced 10. g of dinitrogen monoxide gas. Calculate the pressure of dinitrogen monoxide gas in the reaction vessel after the reaction. You may ignore the volume of the liquid reactants. Round your answer to 2 significant digits. pressure: || atm