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Authored by MIHAELA-ECATERINA IONESCU
Chemistry
9th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În condiţii normale, oxigenul, O2, are densitatea de:
1,9646 g/l
1,9646 g/m3
1,42 g/l
1,42 g/m3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Iodura de sodiu se dizolvă în:
apă
alcool
benzen
tetraclorură de carbon
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Ce gaz este esențial pentru fotosinteză?
metan
heliu
azot
dioxid de carbon
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care este formula chimică a apei?
O2
NaCl
CO2
H2O
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Ce element chimic are simbolul 'Fe'?
Fier
Fluor
Fosfor
Argint
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