Law of COM

Quiz by Kassandra Wendling

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41 questions
• Q1
Is the chemical equation Mg + O2 -> MgO2 balanced or unbalanced?
Unbalanced
Balanced
30s
• Q2
Is the chemical equation H2 + O2 -> H2O balanced or unbalanced?
Balanced
Unbalanced
30s
• Q3
Is the chemical equation 2H2 + O2 -> 2H2O balanced or unbalanced?
Balanced
Unbalanced
30s
• Q4
Is the chemical equation 2CH4 + 3O2 -> 2CO2 + 4H2O balanced or unbalanced?
Balanced
Unbalanced
30s
• Q5
Is the chemical equation NaCl -> Na + Cl2 balanced or unbalanced?
Unbalanced
Balanced
30s
• Q6
What does it mean for a chemical equation to be balanced?
It means that there are different amounts of atoms on either side of the equation.
It means that there are the same number of atoms of each element on both sides of the equation.
It means that the weight is the same for each element.
It means that the equation looks the same on both sides of the equation.
30s
• Q7
Is the equation "2H₂ + O₂ → H₂O" balanced?
Unbalanced
Balanced
30s
• Q8
How many oxygen atoms are on each side of the unbalanced equation "CH₄ + O₂ → CO₂ + H₂O"?
Left side: 2 oxygen atoms; Right side: 3 oxygen atoms.
Left side: 4 oxygen atoms; Right side: 2 oxygen atoms.
Left side: 2 oxygen atoms; Right side: 2 oxygen atoms.
Left side: 1 oxygen atom; Right side: 5 oxygen atoms.
30s
• Q9
If a chemical equation is unbalanced, is it a true representation of a chemical reaction?
Yes, it is a true representation.
No, it's not a true representation.
30s
• Q10
In the equation "2Na + Cl₂ → 2NaCl," is the equation balanced?
Balanced
Unbalanced
30s
• Q11
How many chlorine atoms are on each side of the balanced equation "2Na + Cl₂ → 2NaCl"?
Left side: 2 chlorine atoms; Right side: 1 chlorine atom.
Left side: 1 chlorine atom; Right side: 2 chlorine atoms.
Left side: 2 chlorine atoms; Right side: 2 chlorine atoms.
Left side: 4 chlorine atoms; Right side: 2 chlorine atoms.
30s
• Q12
Is the equation "N₂ + H₂ → NH₃" balanced?
Unbalanced
Balanced
30s
• Q13
How many nitrogen atoms are on each side of the unbalanced equation "N₂ + H₂ → NH₃"?
Left side: 2 nitrogen atoms; Right side: 3 nitrogen atom.
Left side: 2 nitrogen atoms; Right side: 2 nitrogen atom.
Left side: 4 nitrogen atoms; Right side: 4 nitrogen atom.
Left side: 2 nitrogen atoms; Right side: 1 nitrogen atom.
30s
• Q14
What element is unbalanced in the equation "C₆H₁₂O₆ → CO₂ + H₂O"?
Oxygen (O)
Carbon (C)
Hydrogen (H)
all
30s
• Q15
In the balanced equation "4Fe + 3O₂ → 2Fe₂O₃," how many iron (Fe) atoms are on the left side?
1 iron (Fe) atoms
0 iron (Fe) atoms
3 iron (Fe) atoms
4 iron (Fe) atoms
30s

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