Balancing and Reaction Types Review
Authored by Erica Putnam
Chemistry
10th - 12th Grade
NGSS covered
Used 65+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which reaction obeys the law of conservation of mass?
Li + O2 → 2 Li2O
CaI2 + Hg(NO3)2 → HgI2 + 2 Ca(NO3)2
2 C2H2 + 5 O2 → 4 CO2 + 2 H2O
2 PbO2 → PbO + 2 O2
Tags
NGSS.HS-PS1-7
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which reaction below shows aluminum reacting with iron (III) oxide to produce iron and aluminum oxide?
Al2O3 + 2 Fe → 2Al + Fe2O3
2Al + Fe2O3 → 2Fe + Al2O3
Al → Fe2O3 + Al3O3
Al2O3 + Fe2O3 → Al + Fe
Tags
NGSS.HS-PS1-7
NGSS.HS-PS1-2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Look at the chemical reaction: 4 P + 5 O2 → P2O5. Does it obey the law of conservation of mass?
yes, it is properly balanced
no, you need more phosphorus atoms on the reactant side
no, you need more oxygen atoms on the product side
no, you need more phosphorus and oxygen atoms on the product side
Tags
NGSS.HS-PS1-7
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following chemical equation is correctly balanced?
Mg + O2 → MgO
2Mg + O2 → MgO
Mg + O2 → 2MgO
2Mg + O2 → 2MgO
Tags
NGSS.HS-PS1-7
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Which of the following is the balanced chemical equation that would represent the reaction between solid zinc metal and copper (II) nitrate?
Cu(s) + Zn(NO3)2 (aq) → Cu(NO3)2 (aq) + Zn(s)
Zn(s) + Cu(NO3)2 (aq) → Zn(NO3)2 (aq)
Zn(s) + Cu(NO3)2 (aq) → ZnCu + NO3
Cu(NO3)2 (aq) + Zn(s )→ Cu(s) + Zn(NO3)2 (aq)
Tags
NGSS.HS-PS1-7
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
__Pb(NO3)2 + __NaI --> __NaNO3 + __PbI2
Which of the following sets of coefficients correctly balances the above chemical equation?
1:2:1:2
2:1:2:2
1:2:2:1
1:1:1:1
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
When the equation ____Fe2O3 + ____H2 → ____Fe + ____H2O is balanced using whole- number coefficients H2 has a coefficient of :
6
3
2
1
Tags
NGSS.MS-PS1-5
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