at stp 1 mole of a gas contains 22.4 litres. 9.1/22.4= .40625 moles o2. 1 mole of a gas contains 6.022E23 molecules so .40625 moles x 6.022E23 = 2.4464325E23 molecules, but you have to multiply by...
I forget the easier way, so we do it this way. Use PV = nRT and find moles O2. (1 atm)(44.8 liters) = n(0.08206 L*atm/mol *K)(298.15 K) = 1.831 moles O2 1.831 moles O2 (32.0 grams/1 mole O2) = 58.6...
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Standard temperature and pressure (STP), as defined by IUPAC, is 0 degrees Celsius (273 Kelvin) and 1 atmosphere of pressure. Use the ideal gas law: P V = n R T where P is pressure in...