Aluminum has a density of 2.70 g/cm^3What volume in cubic centimeters of aluminum metal would be needed to produce 2.0 10^4 L of hydrogen gas at STP? There are 2 mols of aluminum and 3 of hydrogen gas in the equation.question 2: what ELEMENT is oxidized and which is reduced in HNO3 + SO2 -gt; H2SO4 2NO2Random question.in a battery is the Sulfate the oxidizing agent or reducing agent? and what is the PB when it is chargingThis question confuses me and would likely confuse others.
find moles, using molar volume: 2.0 10^4 L of hydrogen gas 22.4 litres/mol 892.86 moles of H2 by the equation: 2 Al - 3 H2 find moles Al: 892.86 moles of H2 2 mol Al / 3 mol H2 595.24 moles Al use molar mass to find grams of Al: 595.24 moles Al 26.98 g/mol 16,060 grams of Al use density to find volume: 16,060 grams of Al 2.70 g/cc 5948 cc it became a 2 sig fig problem with the data 2.0 10^4 L you ought to consider rounding off your answer to 5900 cm3 question 2: what ELEMENT is oxidized and which is reduced in HNO3 + SO2 - H2SO4 2NO2 an element reduced has its oxidation number reduced HNO3's Nitrogen goes from +5 to +4 in NO2 Nitrogen is reduced an element oxidized gets higher in its oxidation number sulfur in SO2 goes from +4 to +6 in H2SO4 Sulfur is reduced in a battery is the Sulfate neither the oxidizing agent nor the reducing agent? it begins as sulfate in H2SO4 ends as sulfate in PbSO4 its oxidation state does not change n a battery what is the PB when it is charginglet me not answer your question firstwhen an automobile battery is discharging the cathode's PbO2 is the oxidizing agent as it is reduced to Pb+2 (forming PbSO4) the anode's Pb metal is the reducing agent as it is oxidized to Pb+2 (also forming PbSO4) in the charging process the oxidizing agent is PbSO4 's Pb+2 which takes electrons re-forming the Pb metal's the reducing agent is the other 1/2 of the PbSO4's Pb+2 losing electrons re-forming PbO2's .Pb+4
Old joke with a grain of truth: Mechanical Engineers design weapons, Civil Engineers design targetsPoint: If it is worth bombing, it was designed and built by Civil Engineers.
