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WorksheetsBalancing & Types of Chemical Reactions Review
Total questions: 10
Worksheet time: 7mins
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
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
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
Which of the following chemical equation is correctly balanced?
Mg + O2 → MgO
2Mg + O2 → MgO
Mg + O2 → 2MgO
2Mg + O2 → 2MgO
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)
__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
When the equation ____Fe2O3 + ____H2 → ____Fe + ____H2O is balanced using whole- number coefficients H2 has a coefficient of :
6
3
2
1
When the equation _____Fe + _____Cl2 → _____FeCl3 is balanced, the coefficient for Cl2 is:
1
2
3
4
Which of the answer choices below correctly shows the products of the double replacement reaction shown below? BaCl2 + Na2SO4 → ______ + _______
BaSO4 + NaCl
Cl2Ba + SO4Na2
Cl2SO4 + BaNa2
BaCl2 + Na2SO4
What type of bond includes free flowing electrons (sea of electrons) that allow for conductivity of electricity?
Covalent
Metallic
Ionic
Hydrogen
