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Chemistry AQA A level MQ > Topic 1.1: Amount of substance > Flashcards

Topic 1.1: Amount of substance Flashcards

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1
Q

What is the definition of Ar?

A

Ar is the mean mass of an element divided by 1/12 of the mean mass of a carbon 12 atom

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2
Q

What is the definition of Mr

A

Mr is the mean mass of a molecule divided by 1/12 of the mean mass of a carbon 12 atom

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3
Q

What is the formula for the number of particles?

A

number of particles = number of mol x Avogadro’s constant

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4
Q

what is the formula for sulfide and its charge?

A

Sulfide formula: S

Sulfide charge: 2,4 or 6

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5
Q

what is the formula for sulfite and its charge?

A

Sulfite formula: SO3

Sulfite charge: 2

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6
Q

what is the formula for sulfate and its charge?

A

Sulfate formula: SO4

Sulfate charge: 2

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7
Q

what is the formula for nitride and its charge?

A

Nitride formula: N

Nitride charge: 3

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8
Q

what is the formula for nitrite and its charge?

A

Nitrite formula: NO

Nitrite charge: 1

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9
Q

what is the formula for nitrate and its charge?

A

Nitrate formula: NO3

Nitrate charge: 1

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10
Q

what is the formula for carbonate and its charge?

A

Carbonate formula: CO3

Carbonate charge: 2

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11
Q

what is the formula for hydrogen carbonate and its charge?

A

Hydrogen carbonate formula: HCO3

Hydrogen carbonate charge: 1

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12
Q

what is the formula for hydroxide and its charge?

A

Hydroxide formula: OH

Hydroxide charge: 1

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13
Q

what is the formula for phosphate and its charge?

A

Phosphate formula: Po4

Phosphate charge: 3

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14
Q

what is the formula for silver and its charge?

A

Silver formula: Ag

Silver charge: 1

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15
Q

what is the formula for a transition metal and its charge?

A

Transition metal formula: On the periodic table

Transition metal charge: Look at the roman numeral

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16
Q

What is the empirical formula defined as?

A

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

17
Q

What is the molecular formula defined as?

A

The actual number of atoms in each element in a compound

18
Q

Describe the plum pudding model

A

A sphere of positive charge with small negative charges distributed evenly within it

19
Q

Describe the electron shell model

A

A dense central nucleus with protons and neutrons

electrons orbit the nucleus in shells

20
Q

Describe electron orbitals

A

Clouds of an area of probability of where an electron could be found. Can be s, p, d, or f.

21
Q

Which electron orbital fills up first? 3d or 4s

A

4s fills up first before 3d

Chemistry AQA A level MQ (3 decks)

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