The balanced equation for the reaction between Mg and HCl is as follows Mg + 2HCl --> MgCl₂ + H₂ stoichiometry of HCl to H₂ is 2:1
number of HCl moles reacted - 0.400 mol/L x 0.100 L = 0.04 mol of HCl since Mg is in excess HCl is the limiting reactant number of H₂ moles formed - 0.04/2 = 0.02 mol of H₂
we can use ideal gas law equation to find the volume of H₂ PV = nRT where P - pressure - 1 atm x 101 325 Pa/atm = 101 325 Pa V - volume n - number of moles - 0.02 mol R - universal gas constant - 8.314 Jmol⁻¹K⁻¹ T - temperature in Kelvin - 0 °C + 273 = 273 K substituting these values in the equation
101 325 Pa x V = 0.02 mol x 8.314 Jmol⁻¹K⁻¹ x 273 K V = 448 x 10⁻⁶ m³ V = 448 mL therefore answer is c. 448 mL
Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.
Temperature usually increases when water condenses. What behavior of water is most directly responsible for this phenomenon? The release of heat by the formation of hydrogen bonds. Hydrogen bonds stabilize and keep the of ice farther apart than the water molecules of liquid water.
