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Chemistry Topic 2 > 2.1.3- Amount Of Substance > Flashcards

2.1.3- Amount Of Substance Flashcards

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1
Q

What is the amount of a substance?

A

The number of particles in a substance

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2
Q

What is a mole?

A

The amount of a substance that has the same number of particles as there are atoms in 12 grams of carbon-12

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3
Q

How do you work out the number of particles?

A

Moles x avogadros constant

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4
Q

How do you work out moles?

A

Mass/ mR

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5
Q

What is molar mass?

A

The mass per mole and has units gmol-1

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6
Q

What is molar gas volume?

A

The gas volume per mole and has units dm3mol-1

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7
Q

How do you convert tonnes to kg?

A

1 tonne= 1000kg

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8
Q

How do you convert mg to g?

A

1000mg = 1g

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9
Q

How do you convert dm3 to cm3?

A

1 dm3 = 1000 cm3

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10
Q

How do you convert dm3 to litres?

A

1 dm3 = 1 litre

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11
Q

How do you convert cm3 to 1 ml?

A

1 cm3 = 1ml

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12
Q

What is empirical formula?

A

The simplest whole number ratio of atoms of each element present in a compound

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13
Q

What is molecular formula?

A

The number and type of atoms of each element in a molecule

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14
Q

What is water of crystallisation?

A

Water that is part of the crystalline structure. The molecules are stoichiometrically chemically bonded into the crystal structure

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15
Q

What is an anhydrous substance?

A

Contains no water of crystallisation

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16
Q

What is a hydrated substance?

A

Contains water of crystallisation

17
Q

What is a standard solution?

A

A solution of known concentration

18
Q

What is a limiting reagent?

A

The reactant that isn’t in excess

19
Q

How do you calculate concentration?

A

Mass/ volume

20
Q

What is the ideal gas equation?

A

pV= nRT

21
Q

What is R in the ideal gas equation?

A

The ideal gas constant, 8.31 Jk-1mol-1

22
Q

How do you work out percentage yield?

A

Experimental mass/ theoretical mass x 100

23
Q

How do you work out atom economy?

A

Mr of desired product/ mr of reactants x 100

24
Q

Why is it desirables to have a high atom economy?

A

So there is little wastage, which is economically viable for industrial scale manufacture and preserves raw materials

25
Q

What equipment do you use for mass?

A

Digital mass balance

26
Q

What equipment do you use for volume?

A

Measuring cylinder

27
Q

What equipment do you use for volume of a standard solution?

A

Volumetric flask

28
Q

What equipment do you use to measure volume of gas?

A

Gas syringe

29
Q

How do you convert from mol/dm3 to g/dm3?

A

X mr

Chemistry Topic 2 (5 decks)

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