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Samenvatting rekenschema scheikunde

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in dit rekenschema staat duidelijk omschreven hoe je moet rekenen met mol, massa, dichtheid, molair volume, volume en het aantal deeltjes.

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Aantal deeltjes




÷ 6,02. 1023 × 6,02. 1023

÷ Vm Chemische hoeveelheid × Mm ÷ ρ Volume van een vaste stof, een
Volume van een gas = aantal mol Massa vloeistof of een gas

Grootheid: V Grootheid: n Grootheid: m Grootheid: V
Eenheid: dm3 of L × Vm Eenheid: mol ÷ Mm Eenheid: g × ρ Eenheid: cm3 of mL (s) en (l)
Eenheid bij een gas: dm3 of L


÷ V × V


Concentratie
= molariteit

Grootheid: c of [ ]
Eenheid: mol L-1 of M
ρ = dichtheid
Tabel 8,9,10,11
-1
ρ van vaste stoffen en vloeistoffen
Vm = molair volume Concentratie Mm = molaire massa (g mol ) Eenheid: g cm-3 of g mL-1
T = 273K Vm = 22,4 dm3 mol-1 c=n÷V Tabel 98: veel gebruikte stoffen Tabel 12
3
T = 298K Vm = 24,5 dm mol -1
n=c×V Tabel 99: Gemiddelde atoommassa ρ van gassen
Eenheid: g dm-3 of g L-1
V = n × Vm V=n÷c m = n × Mm
ρ=m÷V
n = V ÷ Vm n = m ÷ Mm
m=ρ×V
. 3 . 6
Massa: Een ton = 1 10 kg = 1 10 g V=m÷ρ

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