chemistry- Aqa - GCSE - chapter 3 quantitative chemistry

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9 Terms

1
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Thermal decomposition
a chemical reaction that happens when a compound breaks down when heated.
2
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Define relative atomic mass
the average mass of an element taking into account the masses and abundance of its isotopes.
3
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define relative formula mass
sum of relative atomic masses of all atoms in a formula
4
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what is avogardos constant
the number of atoms, molecules, or ions in a mole of a given substance. 6.02 x 10^23
5
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what is the molar volume of a gas at room temperature and pressure?
1 mole of gas at room temperature and pressure has a volume of 24 dm3
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what is a titration?
a technique where a solution of known concentration is used to determine the concentration of an unknown solution
7
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Why is it not always possible to obtain the calculated amount of a product?
reaction may be reversible, some product may be lost, side reactions may occur.
8
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what is the equation for moles (using mass and Mr)
moles= mass/mr
9
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what are the two equations for concentration
c=m/v c=mol/v