ថ្នាក់គីមីទី១១
Quiz
•
Chemistry
•
11th Grade
•
Hard
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ម៉ាញេស្យូមស៊ុលផាត មានរូបមន្តម៉ូលេគុល គឹ
MgSO3
MgSO4
Mg(SO4)2
Na2SO4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
សង្ក័សីអុកស៊ីត មានរូបមន្តគឺ
Zn(SO4)2
Ca(OH)2
Zn(OH)2
ZnO
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
សំណ(II)ក្លរួ មានរូបមន្តម៉ូលេគុលគឺ
SnCl2
Sn2O
PbO
PbO2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
ដែក(III) ស៊ុលផាត មានរូបមន្តម៉ូលេគុលគឺ
FeSO3
FeSO4
Fe2(SO4)3
Fe(SO4)3
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
I. គណនាម៉ាសនៃធាតុបង្ក C ក្នុងសមាសធាតុ C6H12O6 មានម៉ាស 174g ។ គេឲ្យម៉ាសអាតូមធៀប C =12 , H = 1 , O = 16
mc=6.96g
mc=696g
mc=69.6g
mc=6960g
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
I. គណនាភាគរយធាតុបង្ក %H ក្នុងសមាសធាតុ ស័ង្កសីអ៊ីដ្រុកស៊ីត Zn(OH)2 ។
គេឲ្យម៉ាសអាតូម Zn = 65 , O = 16 , H = 1
%H = 202%
%H = 20.2%
%H = 2.02%
%H = 1.01%
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
I.គណនាម៉ាសទឹកដែលមានក្នុង MgSO4.7H2O 12.3g ។
គេឲ្យម៉ាសអាតូមធៀប Mg = 24 , S = 32 , O = 16 , H = 1
m(H2O) = 0.9g
m(H2O) = 9g
m(H2O) = 63g
m(H2O) = 6.3g
8.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
I. ចូរកំណត់រូបមន្តងាយនៃសមាសធាតុដែលមានភាគរយ
Na=42.1%; P=18.9%; O=39% ។គេឲ្យម៉ាសអាតូមធៀប ( Na=23; P=31; O=16 )
Na2PO4
Na2PO3
Na3PO4
NaPO4
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
គណនាចំនួន ម៉ូលេគុលទឹកក្នុងFeCl3.yH2O ។
បើMr (FeCl3.yH2O)=216.5
x(H2O)= 6 ម៉ូលេគុល
x(H2O)= 5 ម៉ូលេគុល
x(H2O)= 4 ម៉ូលេគុល
x(H2O)= 3 ម៉ូលេគុល
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