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MPW chemistry > Amount of substance > Flashcards

Amount of substance Flashcards

1
Q

Amount of substance definition

A

The quantity which has one mole as the unit, used as a means of counting any species such as atoms, ions and molecules.

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2
Q

Mole definition

A

the amount of any substance containing as many elementary particles as there are carbon atoms in exactly 12g of the carbon-12 isotope, this is 6.02 x 10^23

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3
Q

Avagadros constant definition

A

The number of atoms per mole of the carbon-12 isotope, 6.02 x 10^23

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4
Q

Molar gas volume definition

A

the volume per mole of gas molecules at a stated temperature and pressure

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5
Q

what is the triangle for with moles, mass and Mr?

A

Mass = moles x Mr

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6
Q

what is the triangle for with moles, molar gas volume, and volume of gas?

A

volume = moles x 24

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7
Q

what is the triangle for with moles, concentration and volume?

A

moles = concentration x volume

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8
Q

what is the triangle for with moles, number of particles and avagadros constant?

A

number of particles =moles x 6.02 x 10^23

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9
Q

Empirical formula definition

A

The formula that shows the simplest whole-number ratio of atoms of each element present in a compound

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10
Q

Molecular formula definition

A

A formula that shows the number and types of atoms of each element present in a molecule

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11
Q

water of crystallisation definition

A

water molecules that are bonded into the crystalline structure of a compound

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12
Q

hydrated definition

A

a crystalline compound containing water molecules

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13
Q

anhydrous definition

A

containing no water molecules

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14
Q

concentration definition

A

the amount of solute, in moles, dissolved in 1dm^3 of solution

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15
Q

mass concentration equation

A

mass in grams/volume in dm^3

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16
Q

how to convert from concentration to mass concentration

A

concentration x Mr

17
Q

how to convert mass concentration to normal concentration

A

mass concentration / Mr

18
Q

how do you know what is in excess?

A

the one with the most moles

19
Q

how to work out what’s in excess

A

moles / balancing number

20
Q

limiting reagent definition

A

the reactant that is not in excess, and will all reused up and stop the reaction

21
Q

what determines how much product is made?

A

the moles of the limiting reagent

22
Q

what is the ideal gas equation?

A

PV = nRT

23
Q

ideal gas equation units

A

Pressure in Pa
Volume in m^3
n is moles
Temperature in K

24
Q

dm^3 and cm^3 to m^3

A

dm^3/1000
cm^3/1000000

25
Q

celcius to kelvin

A

celcius + 273

26
Q

mole ratio

A

moles / moles

27
Q

what is the percentage yield equation?

A
28
Q

what is the atom economy equation?

A

MPW chemistry (14 decks)

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