Nguyên tố X có nguyên tử khối bằng 3,5 lần nguyên tử khối của oxi. X là nguyên tố nàosau đây?

ôn tập cuối năm

Quiz
•
Chemistry
•
8th Grade
•
Medium
son nguyen
Used 2+ times
FREE Resource
63 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ca
Na
K
Fe
2.
MATCH QUESTION
1 min • 1 pt
Phân loại các chất sau bằng cách nối
NaOH
muối trung hòa
HCl
muối axit
Cu(OH)2
axit
K2SO4
bazơ không tan
NaHSO4
bazơ tan
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
PTHH nào dưới đây chính xác khi cho Na tác dụng với H2O?
2Na + 2H2O -> 2NaOH + H2
Na + H2O -> NaOH + H2
Na + 2H2O -> 2NaOH + H2
Na + 2H2O -> Na(OH)2
4.
MATCH QUESTION
1 min • 2 pts
Nối công thức hóa học với tên gọi tương ứng
NaCl
đồng (II) clorua
HCl
sắt (II) sunfat
FeSO4
natri clorua
Mg(OH)2
magie hidroxit
CuCl2
axit clohidric
5.
DRAG AND DROP QUESTION
1 min • 1 pt
Oxi là chất (a) , không màu, không mùi, (b) trong nước, (c) không khí.
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Cho m gam bột sắt vào dung dịch axit sunfuric loãng dư, phản ứng hoàn toàn tạo ra 6,72 lít khí hiđro (đktc). Giá trị của m là:
16,8
15,6
8,4
11,2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đồng (II) sunfat là tên gọi của
Cu(OH)2
CuSO4
Cu2O
CuSO3
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