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Kemija završni 2024

Authored by Antonio Mucko

Chemistry

7th Grade

Used 1+ times

Kemija završni 2024
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19 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Ugljikov (IV) oksid je

CO
CO2
C4O
CO4

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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