Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Chemistry
Chemistry
Problem
Which of the following pairs can be cited as an example to illustrate the law of multiple proportion?
N
a
2
O
,
K
2
O
Na_2O, K_2O
N
a
2
O
,
K
2
O
C
a
O
,
M
g
O
CaO, MgO
C
a
O
,
M
g
O
A
l
2
O
3
,
C
r
2
O
3
Al_2O_3, Cr_2O_3
A
l
2
O
3
,
C
r
2
O
3
C
O
,
C
O
2
CO, CO_2
C
O
,
C
O
2
a.
N
a
2
O
,
K
2
O
Na_2O, K_2O
N
a
2
O
,
K
2
O
b.
C
a
O
,
M
g
O
CaO, MgO
C
a
O
,
M
g
O
c.
A
l
2
O
3
,
C
r
2
O
3
Al_2O_3, Cr_2O_3
A
l
2
O
3
,
C
r
2
O
3
d.
C
O
,
C
O
2
CO, CO_2
C
O
,
C
O
2
Browse the problem library