3E Mass ratios

Chemical calculations and reaction equations

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Chemical calculations and reaction equations

Slide 1 - Diapositive

Give the molecular formula of
phosphorus pentachloride
timer
0:30

Slide 2 - Question ouverte

Give the correct name for
N2O
timer
0:30
A
dinitrogen oxide
B
nitrogen dioxide
C
dinitrogen dioxide
D
dinitrogen monoxide

Slide 3 - Quiz

Aluminium oxide ( Al2O3 ) is formed from its elements. Give the reaction equation.
Arrow: → is "ALT 26"
timer
1:00

Slide 4 - Question ouverte

What is the unit for density?
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0:30
A
cm3g
B
gcm3

Slide 5 - Quiz

How many L O2 is needed for the reaction of 5 m3 Al?
Massa ratio Al : O2 = 9 : 8
4Al+3O22Al2O3
ρAl=2,7cm3g
ρO2=1,43Lg

Slide 6 - Question ouverte

V_O2 in L, required to let 5 m3 Al react fully into Al2O3
ρ Al = 2,7 g per cm3; ρ O2 = 1,43 g per L; Al : O2 = 9 : 8  

Slide 7 - Diapositive

In an airbag sodium azide (NaN3 ) reacts rapidly into its elements.
Give the reaction equation.

Slide 8 - Question ouverte


This reaction is a:
2NaN32Na+3N2
timer
0:30
A
combustion reaction
B
decomposition reaction
C
synthesis reaction
D
who should I know?

Slide 9 - Quiz

Calculate the amount of liters of N2 that is formed during the decomposition of 60 g NaN3.
mass ratio Na : N2 = 2 : 3,6
ρN2=1,25Lg

Slide 10 - Question ouverte

 V = ? L nitrogen formed during the decomposition of 60 g sodium azide.
The mass ratio sodium : nitrogen = 2 : 3,6
ρN2=1,25Lg

Slide 11 - Diapositive

When hydrogen and nitrogen react, ammonia is formed. Give the chemical equation.

Slide 12 - Question ouverte

Calculate the volume% of H2 that does not react when 18 L of hydrogen reacts with 5 L of N2.
mass ratio H : N2 = 3 : 14
3H2+N22NH3
ρH2=0,090Lg
ρN2=1,17Lg

Slide 13 - Question ouverte

Slide 14 - Diapositive

Test next week in
Learn elements & nomenclature; 
do you assignments utai wk 3

You can expect:
  • approx. 5 reaction equations (assignment week 50-51)
  • approx. 8 calculations with massa ratio's, density, deficit, yield and/or percentages. (assignment week 1-3)

Slide 15 - Diapositive