
formule chimice varianta 2
Authored by dragostina radulescu
Chemistry
7th - 8th Grade
Used 15+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Clorura de sodiu , o substanta frecvent utilizata este cunoscuta in viata de zi cu zi sub denumirea de :
sare de bucatarie
sare amara
var nestins
acid clorhidric
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Valenta sulfului in SO3 este :
2
4
6
5
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
In 4O3 ( 4 molecule de ozon ) se gasesc :
10 atomi
12 atomi
7 atomi
4 atomi
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Formula corecta a clorurii de zinc este :
Zn2Cl
ZnCl
ZnCl2
Zn2Cl2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sase molecule de acid clorhidric se acriu :
6HCl
H6Cl6
3HCl2
3H2Cl
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Numarul total de atomi din 4CH4 este :
8
20
16
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trei molecule de amoniac se scriu :
(NH3)3
N3H9
N2H6
3NH3
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