Constitution de la matière Flashcards

1
Q

composés air

A

N2: 78%
O2: 22%

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2
Q

Téb N2

A

-146,9°C

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3
Q

Téb O2

A

-118,4°C

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4
Q

nombre d’éléments connus

A

109 dont 92 existants à l’état naturel

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5
Q

compo corps humain

% massique

A

O: 65%
C: 18%
H: 10%
N: 3%

éléments inorganiques < 3%

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6
Q

éléments métalliques

A

conducteurs chaleur et électricité
malléables
ductiles
éclat

Fe, Cu, Au, Ag

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7
Q

éléments non métalliques

A

mauvais conducteurs chaleur et électricité
peu malléables
peu ductiles
sans éclat

C, S, Cl, O, H

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8
Q

gaz rares

A

inertes chimiquement

HErcule NEgligea d’ARracher le KoRsage de Xena et RoNfla

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9
Q

Sb

A

Stibium —> Antimoine

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10
Q

Hg

A

Mercure —> Hydrargyrum

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11
Q

K

A

Potassium —> Kalium

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12
Q

Na

A

Sodium —> Natrium

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13
Q

Sn

A

Etain —> Stannum

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14
Q

masse atomique

A

ref : 12C
en uma
pour techniques introspections

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15
Q

masse molaire

A

masse d’1 mol d’atomes
en g.mol-1
études macroscopiques // chimie

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16
Q

mol (n)

A

n = N/ 6,022.10^23

17
Q

volume molaire

A

volume occupé par une mole

Vmol gaz parfait = 22,414 L

18
Q

loi gaz parfaits

A

P x V = n x R x T

19
Q

1 Pa =

A

10-5 bar
10-5 atm
7,3 mmHg (torr)

20
Q

1mmHg =

A

133 Pa

21
Q

masse volumique p

A

p = m/v

22
Q

°C en K

A

K = °C + 273,15

23
Q

p eau

A

1 kg.L-1

24
Q

d composé

A

= p composé/ p eau

= p composé/ p air

25
Q

p air

A

1,29 g.L-1

26
Q

concentration massique aka pondérale

A

CA= mA/ Vsolution

kg.m-3 ou g.L-1

27
Q

molarité = concentration molaire

A

CM = n/ V solution
mol.L-1
ou
CA (concentration pondérale) /masse molaire

28
Q

molarité de NaCl à 0,9% (9g.L-1)

soluté physiologique

A

0,15 mol.L-1

29
Q

molarité eau liquide

A

55,5 mol.L-1

30
Q

molalité

A

m = n/ m solvant

mol.kg-1

31
Q

fraction molaire

A

xi = ni/ ntotale

32
Q

pourcentage en masse

A

mi/ mtotale x100

33
Q

pression partielle (gaz parfaits)

A

Pi = xi x Pt