
គីមីថ្នាក់ទី១២ មេរៀនទី១ ស៊ីនេទិចគីមី
Authored by Sey Tikheayu
Chemistry
12th Grade
Used 2+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
ក. 8.86 x 10-5 mol.L-1
និង
17.72 x 10-5 mol.L-1
ខ. 8.86 x 10-5 mol.L-1
និង
8.86 x 10-5 mol.L-1
គ. 8.86 x 10-5 mol.L-1
និង
4.43 x 10-5 mol.L-1
ឃ. 8.86 x 10-5mol.L-1
និង
17.72 x 10-3 mol.L-1
2.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
a. -1.4 x 10-6 M.s-1
b. 1.4 x 10-6 M.s-1
c. 201.4 x 10-5 M.s-1
d. -201.4 x 10-5 M.s-1
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
បើនៅខណៈពេល t = 12min មានកំហាប់ [I2] = 2.4 x 10-3 mol.L-1 និងនៅខណៈពេល t = 32min មានកំហាប់ [I2] = 4 x 10-3 mol.L-1 ។ ចូរគណនាល្បឿនមធ្យមកំណអុីយ៉ូតនៅចន្លោះពេលខាងលើនេះ។
ក.2.4 x 10-5mol.L-1.s-1
ខ. 24x 10-5mol.L-1.s-1
គ. 4 x 10-5mol.L-1.s-1
ឃ. 8 x 10-5mol.L-1.s-1
4.
MULTIPLE CHOICE QUESTION
2 mins • 3 pts
ក្នុងប្រតិកម្មបំបាត់ MnO4- នៅខណៈ t1 = 0 នោះមានកំហាប់ [MnO4- ] = 5.2 x 10-3 mol.L-1 និងនៅខណៈ t2 = 6s មានកំហាប់ [MnO4- ] = 3.4 x 10-3 mol.L-1 ។ ចូរគណនាល្បឿនមធ្យមបំបាត់ MnO4- នៅចន្លោះពេល 0 ទៅ 6s។
ក. 3 x 10-5 mol.L-1.s-1
គ. 5 x 10-4 mol.L-1.s-1
គ. 3 x 10-4 mol.L-1.s-1
ឃ.3 x 10-5 mol.L-1.s-1
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
A. 2 x 10-4 mol.L-1.s-1
B. 2 x 10-5 mol.L-1.s-1
C. 5 x 10-4 mol.L-1.s-1
D. 5 x 10-5 mol.L-1.s-1
6.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
ក. 3x10-4M.s-1
ខ. 1.5x10-4M.s-1
គ. 0.75x10-4M.s-1
ឃ. 7.5x10-4M.s-1
7.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
នៅខណៈ t = 3min គេទទួលបាន H2 = 12mL និងនៅខណៈ t = 5min គេទទួលបាន H2 = 14.24mL នៅលក្ខខណ្ឌ STP មាឌម៉ូឧស្ម័ន Vm = 22.4L/mol ។ កំណត់ល្បឿនមធ្យមកំណ H2(mol/min) នៅចន្លោះពេល 3min ទៅ 5min។
14.24 x 10-5 mol/min
22.4 x 10-5 mol/min
0.5 x 10-5 mol/min
5 x 10-5 mol/min
71 x 10-5 mol/min
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