
KIỂM TRA LÀO
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Chemistry
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Professional Development
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ສານໃດຕໍ່ໄປນີ້ແມ່ນ electrolyte ທີ່ອ່ອນແອ?
ສານໃດຕໍ່ໄປນີ້ແມ່ນ electrolyte ທີ່ອ່ອນແອ?HCl
Na2CO3
Ba(OH)2
HF
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງ
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງA
B
C
D
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
pH ຂອງ HCl 0.0001M ການແກ້ໄຂແມ່ນ
pH ຂອງ HCl 0.0001M ການແກ້ໄຂແມ່ນ10
3
2
4
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ສໍາລັບປະຕິກິລິຍາ RCOOH + R'OH RCOOR' + H2O ມີ = 2.25. ຖ້າຄວາມເຂັ້ມຂົ້ນຂອງ molar ເບື້ອງຕົ້ນຂອງທັງອາຊິດແລະເຫຼົ້າແມ່ນ 1M, ອັດຕາສ່ວນຂອງເຫຼົ້າໄດ້ຖືກ esterified ເມື່ອປະຕິກິລິຍາເຖິງຄວາມສົມດຸນ?
ສໍາລັບປະຕິກິລິຍາ RCOOH + R'OH RCOOR' + H2O ມີ = 2.25. ຖ້າຄວາມເຂັ້ມຂົ້ນຂອງ molar ເບື້ອງຕົ້ນຂອງທັງອາຊິດແລະເຫຼົ້າແມ່ນ 1M, ອັດຕາສ່ວນຂອງເຫຼົ້າໄດ້ຖືກ esterified ເມື່ອປະຕິກິລິຍາເຖິງຄວາມສົມດຸນ?75%
50%
60%
65%
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງ
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງA
B
C
D
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງ
ເລືອກຄໍາຕອບທີ່ຖືກຕ້ອງA
B
C
D
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
ຈໍານວນການຜຸພັງຂອງ N ໃນ NO2 ແມ່ນ
ຈໍານວນການຜຸພັງຂອງ N ໃນ NO2 ແມ່ນ+2
+3
+4
-4
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