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Chemistry
8th Grade

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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
kí hiệu và công thức tính số mol chất
kí hiệu là n
n = m/M (mol)
kí hiệu là m
m = n/M (mol)
kí hiệu là n
n = M/m (mol)
kí hiệu là M
M = m/n (mol)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
kí hiệu và công thức tính khối lượng chất
kí hiệu m
m = n x M (gam)
kí hiệu M
M = n x m (gam)
kí hiệu n
n = m x M (gam)
kí hiệu m
m = M/n (gam)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
kí hiệu và công thức tính khối lượng mol
kí hiệu M
M = m/n
(gam/mol)
kí hiệu m
m = M/n
(gam/mol)
kí hiệu M
M = m x n
(gam/mol)
kí hiệu n
n = m x M
(gam/mol)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khối lượng của Zinc
56
65
64
28
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
kí hiệu và công thức tính số mol chất khí
kí hiệu V
V = n x 24,79 (lít)
kí hiệu n
n = V x 24,79 (lít)
kí hiệu n
n = V/24,79 (mol)
kí hiệu n
n = 24,79/ V (mol)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
công thức tính tỉ khối chất khí
dA/B = MA/MB
dA/B = MB/MA
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
độ pH:
?1>7>?2
7:?3
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