Table 1: Molar masses of common rock forming elements Atomic Mass (amu) 28.09 Element Oxide (1) Common Valence (2) Oxide mass (amu) Si Ti Al Sio, TiO, Al,O Cr,O 47.87 26.98 Cr 52.00 Fe 55.85 Feo Fe,O; MnO MgO Сао Na,O K,O POs Mn 54.94 24.31 40.08 22.99 Mg Са Na K P 39.10 30.97 16.00 1. Fill out the column for (1) common valence in the Table above. Calculate the formula masses of all the oxides in Table 1 and fill out the (2) oxide mass column. Keep this table for future reference. Note that iron has two common valence states in rocks. Convert 4.2 wt.% MgO to wt. % Mg
Table 1: Molar masses of common rock forming elements Atomic Mass (amu) 28.09 Element Oxide (1) Common Valence (2) Oxide mass (amu) Si Ti Al Sio, TiO, Al,O Cr,O 47.87 26.98 Cr 52.00 Fe 55.85 Feo Fe,O; MnO MgO Сао Na,O K,O POs Mn 54.94 24.31 40.08 22.99 Mg Са Na K P 39.10 30.97 16.00 1. Fill out the column for (1) common valence in the Table above. Calculate the formula masses of all the oxides in Table 1 and fill out the (2) oxide mass column. Keep this table for future reference. Note that iron has two common valence states in rocks. Convert 4.2 wt.% MgO to wt. % Mg
Chemistry: An Atoms First Approach
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Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter3: Bonding: General Concepts
Section: Chapter Questions
Problem 140CWP
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![Table 1: Molar masses of common rock forming elements
Element
Atomic Mass
Oxide
(1) Common
(2) Oxide mass
(amu)
28.09
Valence
(amu)
Si
Ti
Al
Sio,
TiO
Al,O3
Cr,O;
Feo
47.87
26.98
Cr
52.00
Fe
55.85
Fe,O;
Mno
Mn
54.94
MgO
Cao
Na,O
KO
POs
Mg
24.31
Са
40.08
Na
22.99
K
39.10
P
30.97
16.00
1. Fill out the column for (1) common valence in the Table above. Calculate the formula
masses of all the oxides in Table 1 and fill out the (2) oxide mass column. Keep this
table for future reference. Note that iron has two common valence states in rocks.
Convert 4.2 wt.% MgO to wt. % Mg
Answer
2. Convert 0.103 wt.% Mno to ug/g Mn
Answer
3. Convert 11.4 wt.% Al,O; to wt.% Al and ug/g O
Answer](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcd2bea43-504d-47e2-8194-0a030965f950%2F61b83ff8-5e1d-4de7-97a8-67dd9d1570cd%2Fz8eatzj_processed.png&w=3840&q=75)
Transcribed Image Text:Table 1: Molar masses of common rock forming elements
Element
Atomic Mass
Oxide
(1) Common
(2) Oxide mass
(amu)
28.09
Valence
(amu)
Si
Ti
Al
Sio,
TiO
Al,O3
Cr,O;
Feo
47.87
26.98
Cr
52.00
Fe
55.85
Fe,O;
Mno
Mn
54.94
MgO
Cao
Na,O
KO
POs
Mg
24.31
Са
40.08
Na
22.99
K
39.10
P
30.97
16.00
1. Fill out the column for (1) common valence in the Table above. Calculate the formula
masses of all the oxides in Table 1 and fill out the (2) oxide mass column. Keep this
table for future reference. Note that iron has two common valence states in rocks.
Convert 4.2 wt.% MgO to wt. % Mg
Answer
2. Convert 0.103 wt.% Mno to ug/g Mn
Answer
3. Convert 11.4 wt.% Al,O; to wt.% Al and ug/g O
Answer
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