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Maybe Balancing Chemical Equations Quiz 2
Authored by Jayland Redd
Science
5th Grade
NGSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
1, 1, 1
2, 1, 2
2, 2, 2
1, 2, 2
Answer explanation
To balance the equation, we need 2 H2 molecules and 1 O2 molecule to produce 2 H2O molecules. This gives us the coefficients 2, 1, 2, making the correct choice 2, 1, 2.
2.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
2, 1, 2
1, 2, 2
2, 2, 2
1, 1, 2
Answer explanation
To balance the equation, we need 2 Na for every Cl2, resulting in 2 NaCl. Thus, the coefficients are 2 for Na, 1 for Cl2, and 2 for NaCl, making the correct choice 2, 1, 2.
3.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
1, 1, 1
2, 1, 2
1, 2, 2
2, 2, 2
Answer explanation
To balance the equation, we need 2 Mg atoms and 2 O atoms from O2, resulting in 2 MgO. Thus, the coefficients are 2 for Mg, 1 for O2, and 2 for MgO, making the correct choice 2, 1, 2.
4.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
4, 5, 2
2, 5, 4
2, 4, 5
5, 4, 2
Answer explanation
To balance the equation, we need 4 P atoms and 5 O atoms to produce 2 P2O5 molecules. Thus, the coefficients are 4 for P, 5 for O2, and 2 for P2O5, making the correct choice 4, 5, 2.
5.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
2, 2, 3
2, 3, 2
3, 2, 2
1, 2, 3
Answer explanation
To balance the equation, we need 2 KClO3 to produce 2 KCl and 3 O2. This gives us 2 KClO3 → 2 KCl + 3 O2, confirming that the correct coefficients are 2, 2, 3.
6.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
1, 2, 1, 2
2, 1, 2, 1
1, 1, 2, 2
2, 2, 1, 2
Answer explanation
To balance the equation, we need 1 CH₄ and 2 O₂ to produce 1 CO₂ and 2 H₂O. This gives us the coefficients 1, 2, 1, 2, which matches the correct choice.
7.
MULTIPLE CHOICE QUESTION
30 mins • 5 pts
What are the correct coefficients to balance the equation: ?
2, 3, 2
4, 3, 2
3, 2, 4
2, 2, 3
Answer explanation
To balance the equation, we need 4 Fe and 3 O2 to produce 2 Fe2O3. This gives us 4 Fe + 3 O2 → 2 Fe2O3, confirming that the correct coefficients are 4, 3, and 2.
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