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Physical Chem > PPE > Flashcards

PPE Flashcards

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1
Q

relative atomic mass

A

the weighted mean mass of an atom of an element compared with 1/12th of the mass of an atom of carbon-12

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2
Q

relative isotopic mass

A

the mass of an atom of an isotope compared with 1/12th of the mass of an atom of carbon-12

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3
Q

molecular formula

A

the actual number of atom of each element in a molecule

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4
Q

empirical formula

A

simplest ratio of the atom of each element in the molecule

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5
Q

what to do when a q states the number of atoms

A

use avorgados gas constant

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6
Q

what are units for
Pressure
volume
temp
gas constant

A

pressure=pa
volume=m^3
temp=+273
gas constant=8.314

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7
Q

% yield

A

actual yield divide predicted yield x100

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8
Q

atom economy definition

A

mass of products you want as a % of the mass of all products you make

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9
Q

atom economy

A

mass of useful divide mass of ALL product x100

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10
Q

% atom economy

A

sum of molar masses of desired products DIVIDE sum of molar masses of all products x100

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11
Q

% uncertatinty go over

A

2 x uncertatinty in each measurements divide quantity measured and the x100

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12
Q

weak acid

A

partially dissosciates

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13
Q

ACID + ALKALI

A

=SALT AND WATER

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14
Q

ACID + METAL

A

SALT AND HYDROGEN

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15
Q

METAL HYDROXIDE + ACID

A

SALT AND WATER

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16
Q

METAL CARBONATE + ACID

A

SALT + WATER + CO2

17
Q

base

A

neutralises acids to form salt

18
Q

alkali

A

base that dissolves in h20 releasing OH- ions

19
Q

oxidation number definition

A

a measure of the number of electrons that an atom uses to bond w another element

20
Q

LEARN CHARGES FOR FORUMLASSSS BRO go over describe what students would see in this reaction aswell

A

ASAP BLURT BLURT

21
Q

periodicity

A

repeated trend in properties of elements

Physical Chem (9 decks)

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