# Moles

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• Moles
• Molar Gas Equation
• moles (mol) of a gas = volume (dm ) / 24 (dm  mol )
• One mol of any gas, occupies the same volume at the same temperature and pressure (room)
• 1 mol of anu gas occupies 24 dm
• Atom Economy
• %= mass of desired amount (g) / mass of reactants X 100
• For mass, use Mr (molecular mass) in gmol-
• Ideal Gas Equation
• STP= Standard temperature and pressure
• 1 mol of any gas occupies 22.7 dm
• Temperature is considered 0 degrees Celsius and pressure 101 Kilo Pascals
• RTP= Room temperature and pressure
• 1 mol of anu gas occupies 24 dm
• Temperature is considered 25 degrees Celsius and pressure 101 Kilo Pascals
• pv=n RT
• p= pressure in kilo pascals
• v= volume in dm
• n= number of moles in mol
• R= the gas constant (8.314) given on exam sheet
• T= temperature in Kelvin (+273 onto temperature in Celsius)
• Percentage Yeild
• %= actual mass of product/ theoretical mass of produce X 100
• Moles in Solution
• moles (mol) = concentration (mol dm ) X volume (dm )
• Moles in an element or compound
• moles (mol)= mass (g) / atomic, molecular mass (g mol )
• Percentage uncertainty
• %= uncertainty value / reading X 100
• If reading are repeated, you must multiply the uncertainty value by the number of repetition times