
Kemija završni 2024
Authored by Antonio Mucko
Chemistry
7th Grade
Used 1+ times

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19 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ugljikov (IV) oksid je
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Reaktanti su tvari koje ulaze u kemijsku reakciju:
da
ne
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
U molekuli vode, H2O, je
1 atom vodika i 1 atom kisika
1 atom vodika i 2 atoma kisika
2 atoma vodika i 1 atom kisika
2 atoma vodika i 2 atoma kisika
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dva atoma vodika je
H2
H
2H
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Na2O
Natrijev(I) oksid
Natrijev(II) oksid
Natrijev(IV) oksid
Natrijev oksid
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
U kemijskoj analizi vode masa vodika je 3 g, a masa kisika je 7 g. Kolika je masa vode?
10g
10 kg
4g
4kg
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Kemijske jednadžbe sinteze su:
voda →vodik +kisik
amonijak →dušik + vodik
kalij + kisik →kalijev oksid
a) 2Mg + O2 → 2MgO
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