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Chemistry > Chemical Reactions & Stoichiometry > Flashcards

Chemical Reactions & Stoichiometry Flashcards

1
Q

What is one mole?

A

6,022 x 10^23

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2
Q

What is Avogadro’s number?

A

1 mole = 6.022 x10^23

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3
Q

What are the units of the equation: M=m/n ?

A

g/mol= g/mol

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4
Q

What are the components of M=m/n

A

Molar mass = sample mass / number of moles

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5
Q

What does Ar start for?

A

Relative atomic mass

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6
Q

What is the molar mass of oxygen?

A

16

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7
Q

What is the molar mass of hydrogen?

A

1

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8
Q

What is the molar mass of carbon?

A

12

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9
Q

What ar the units of C = n/V

A

Moles (n) / litre (L)

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10
Q

What are the components of C=n/V

A

Concertration = number of moles/ volume

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11
Q

What is 1 litere the same as?

A

Dm^3

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12
Q

What are the components of c1V1=c2V2

A

Initial concentration x initial volume = final concentration x final volume

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13
Q

What is the molecular formula & empirical formula of benzene

A

Molecular: C6h6
Emerperical: CH

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14
Q

What does the empirical formula tell us?

A

The ratio between the elements in the compound

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15
Q

Formula for percentage yield

A

Percentage yield = ( actual yield / theoretical yield ) x 100%

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16
Q

Formula for ideal gas law

A

Pv=nrt

17
Q

Conversion of Celsius to Kelvin

A

Add 273 as 0c= 273k

18
Q

What is a synthesis/ combination reaction?

A

Complex compound formed from simpler inputs
X+ y→ xy

19
Q

What is a decomposition reaction?

A

Compound is broke into simpler compounds/atoms
Xy → x+ y

20
Q

What is a combustion reaction?

A

Compound with C, h & sometimes O (organisation compound) reacts with O2 to form H2O & Co 2

21
Q

What is formed during a combustion reactions?

A

H20 & co2

22
Q

What is a displacement/single replacement reaction?

A

More reactive element displace less reactive elements
X+ yz → xy+ z if x is more reactive than z

23
Q

What is a exchange/ double replacement reaction?

A

2 replacements
Ax + ay → ay + bx

24
Q

Formula for rate of reaction

A

Google answer

25
Q

What lowers activation energy

A

Catalyst

26
Q

Is the catalyst consumes by the reaction?

A

No

27
Q

What is a disproportionation reaction?

A

A reaction where a compound undergoes both oxidation & reduction

28
Q

What is the change in enthalpy?

A

The heat that is transferred under constant pressure

29
Q

What is an endothermic reaction?

A

When energy goes into the system & change in enthalpy is positive

30
Q

What is an exothermic reaction?

A

When energy goes into the surroundings & change in enthalpy is negative

31
Q

What is the unit of rate of reaction?

A

M/s (molar/s)

32
Q

Rate of reaction =?

A

Rate = change in concentration / change in time

33
Q

What is the only thing that can change an equilibrium constant?

A

Increase or decrease in temperature

34
Q

What is a disproportionation reaction?

A

A reaction where the same element is both oxidised & reduced

Chemistry (10 decks)

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