What is the primary goal when finding oxidation numbers in PbCO3?

Oxidation Numbers and Carbonate Ions

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Chemistry
•
9th - 10th Grade
•
Hard

Mia Campbell
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9 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To calculate the number of atoms
To find the oxidation numbers of each element
To identify the charge of each element
To determine the molecular weight
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the charge of the carbonate ion (CO3)?
1+
2-
0
3-
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does lead (Pb) have an oxidation number of +2 in PbCO3?
Because it is a metal
Because it balances the charge of the carbonate ion
Because it forms a covalent bond
Because it is in Group 2 of the periodic table
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical oxidation number of oxygen in compounds?
+2
-2
0
-1
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many oxygen atoms are present in the carbonate ion?
4
3
2
1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What equation is set up to find the oxidation number of carbon in PbCO3?
2 + x - 6 = 0
x + 2 = 6
x - 2 = 6
2x - 6 = 0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation number of carbon in PbCO3?
+3
+2
+4
+5
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sum of oxidation numbers in a neutral compound?
-1
1
2
0
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What rule is used to determine the oxidation number of oxygen?
Oxygen is always +2
Oxygen is always -2 with few exceptions
Oxygen is always -1
Oxygen is always neutral
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