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Chemistry
Relative atomic mass and formula mass
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Cards (1)
Relative atomic mass
A
r
=
Ar=
A
r
=
(
p
e
r
c
e
n
t
a
g
e
x
m
a
s
s
1
)
+
(percentage x mass 1 )+
(
p
erce
n
t
a
g
e
x
ma
ss
1
)
+
(
p
e
r
c
e
n
t
a
g
e
x
m
a
s
s
2
)
d
i
v
i
d
e
b
y
100
(percentage x mass 2) divide by 100
(
p
erce
n
t
a
g
e
x
ma
ss
2
)
d
i
v
i
d
e
b
y
100
