IG Chem – Chemical Equations

IG Chem – Chemical Equations

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Question 1 of 15

1. Question
1 point(s)
The starting chemicals in a chemical equation are called products.
- true
- false
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Question 2 of 15

2. Question
1 point(s)
In a chemical equation, state symbols must be included for each substance.
- true
- false
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Question 3 of 15

3. Question
1 point(s)
Diatomic elements exist as molecules containing two atoms.
- true
- false
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Question 4 of 15

4. Question
1 point(s)
The correct balanced chemical equation for the reaction between hydrogen and oxygen is 2H₂(g) + O₂(g) → 2H₂O(l).
- true
- false
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Question 5 of 15

5. Question
1 point(s)
The state symbol for a gas is (aq).
- true
- false
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Question 6 of 15

6. Question
1 point(s)
Sulfur burns in air to form sulfur trioxide.
- true
- false
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Question 7 of 15

7. Question
1 point(s)
Balancing equations requires ensuring the same number of each type of atom on both sides of the equation.
- true
- false
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Question 8 of 15

8. Question
1 point(s)
The word equation for the reaction between methane and oxygen is methane + oxygen → carbon dioxide + water.
- true
- false
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Question 9 of 15

9. Question
1 point(s)
The unbalanced equation for the combustion of ethane is C₂H₆ + O₂ → CO₂ + H₂O.
- true
- false
Correct

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Question 10 of 15

10. Question
1 point(s)
Ionic equations show reactions involving ions.
- true
- false
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Question 11 of 15

11. Question
1 point(s)
In the reaction between lead(II) nitrate and potassium iodide, the important ions are lead(II) ions and iodide ions.
- true
- false
Correct

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Question 12 of 15

12. Question
1 point(s)
The simplified ionic equation for the reaction between lead(II) nitrate and potassium iodide is Pb²⁺(aq) + 2I⁻(aq) → PbI₂(s).
- true
- false
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Question 13 of 15

13. Question
1 point(s)
Copper(II) hydroxide is produced as a solid in the reaction between copper(II) ions and hydroxide ions.
- true
- false
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Question 14 of 15

14. Question
1 point(s)
The charge on a copper(II) ion is 1⁺.
- true
- false
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Question 15 of 15

15. Question
1 point(s)
Balancing equations can be done by trial and error.
- true
- false
Correct

Incorrect