Flashcards
AQA Chemistry Amount of substance.
Cards in this deck (19)
- 1What is molar mass the same as?The relative molecular mass.
- 2How do you work out moles?Mass
Moles=--------------------
Molar mass/ Mr - 3How do you work out concentration?Moles
Concentration=----------------------------
Volume in dm^(3) - 4How do you convert cm^(3) to dm^(3)?divide by 1000.
- 5What is the volume of any gas at room temperature pressure? (298K/25C and 100kPa)24dm^(3)
- 6How do you work out the moles in a volume of gas at ROOM TEMP PRESSURE.Volume in dm^(3)
Number of moles=-----------------------------
24 - 7What is the ideal gas equation?pV= nRT
- 8What is 'P' in the ideal gas equation and what are its units?Pressure (Pa)
- 9What is 'V' in the ideal gas equation and what are its units?Volume (m^(3))
- 10How do you convert cm^(3) to m^(3)?divide by 1,000,000
- 11What is 'R' in the ideal gas equation and what is its units?The gas constant. ALWAYS 8.31 JK^(-1)mol^(-1)
- 12Define relative atomic mass.Average mass of an atom of an element
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1/12 x mass of one atom of 12C - 13Define relative molecular mass.average mass of one molecule of an element
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1/12 x mass of one atom of 12C - 14how many particles does one mole contain? ( Avogadro constant)6.023 x 10^(23)
- 15What is T in the ideal gas equation and what is its units?Temperature in Kelvin ( K) - add 273 to Celsius.
- 16What is empirical formula?The simplest whole number ratio of atoms of each element in a compound.
- 17What is molecular formula?The actual number of atoms of each element in one molecule.
- 18How do you calculate % atom economy?mass of desired product
--------------------------------- x100
total mass of reactants - 19How do you calculate percentage yield?actual yield
------------------ x100
Theoretical yield
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- A Level AS AQA Chemistry (Unit 1) Flashcards on AQA Chemistry Amount of substance., created by Megan Vann on 23/12/2014.
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- Megan Vann
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