
Stehiometrija
Authored by Mateja Godec
Chemistry
12th Grade
Used 1+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Pri gorenju 1 mol etanola (C2H6O):
nastaneta 2 mol plina metana;
nastaneta 2 mol plina ogljikovega dioksida;
se energija porablja;
nastane 6 mol vode.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Narisana shema prikazuje kemijsko reakcijo med molekulami snovi A in B. Kateri snovi sta lahko A in B?
Snov A je lahko vodik, snov B pa vodikov klorid.
Snov A je lahko vodik, snov B pa kisik.
Snov A je lahko vodik, snov B pa klor.
Snov A je lahko vodik, snov B pa dušik.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Shema prikazuje kemijsko reakcijo, ki je potekla med snovjo A in snovjo B. Katera trditev je pravilna?
Snov A pri reakciji ne zreagira popolnoma.
Molekul plinastega produkta je dvakrat toliko kakor molekul snovi A.
Nastane element v plinastem agregatnem stanju.
Snov A in snov B reagirata v množinskem razmerju 1 : 2.
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Katera enačba reakcije ni pravilno urejena?
2AlN + 3H2O → Al2O3 + 2NH3
3Fe2O3 + CO → 2Fe3O4 + CO2
Al + NaOH + 3H2O → Na[Al(OH)4] + 3H2
C3H8 + 5O2 → 3CO2 + 4H2O
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Natrijev azid NaN3 pri segrevanju razpade na elementa. Katera trditev o tej reakciji je pravilna?
Množina nastale kovine je enaka množini reaktanta.
Masa nastale nekovine je enaka masi nastale kovine.
Množina nastale nekovine je enaka množini nastale kovine.
Množina natrijevega azida je enaka vsoti množin nastalih produktov.
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Litijev nitrid nastane s spajanjem elementov. Kolikšno maso litija potrebujemo za nastanek 1,80 mol litijevega nitrida?
4,16 g
12,5 g
37,5 g
180 g
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pri reakciji med železom in bromom nastaja železov(III) bromid. Koliko gramov broma je potrebnih za reakcijo z 223 g železa?
319 g
479 g
638 g
957 g
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