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WorksheetsBalancing Chemical Equations Quiz #2
Total questions: 31
Worksheet time: 24mins
_Zn+_HCl-->_ZnCl2 +_H2
_Mg + _Cl2 --> _MgCl2
H2 + O2 -> H2O
_2_H2 + _1_O2 -> _2_H2O
H2 + O2 -> H2O
H2 + O2 -> H2O
What is the arrow in a chemical equation...
H2 + O2 --> H2O
Reactants
Products
Yields
Chemical Equation
MgCl2 --> Mg4+ Cl2
What type of reaction is below?
CH4 + O2 --> CO2 + H2O
Combination/Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion
What type of reaction is below?
Cu2O + K --> K2O + Cu
Combination/Synthesis
Decomposition
Double Replacement
Combustion
Single Replacement
What type of reaction is below?
H2O --> H2 + O2
Combination/Synthesis
Decomposition
Single Replacement
Double Replacement
What type of reaction is below?
Mg(NO3)2 + Na2O --> NaNO3 + MgO
Combination/Synthesis
Single Replacement
Double Replacement
Combustion
Predict the products of this reaction: MgO + Li --> ?
LiO + Mg
MgO + Li
Li2O + Mg
LiMg + O
MgLi + O
What would the products of this reaction be? K2O --> ?
K + O
K2 + O
K2 + O2
K + O2
K2O
Predict the products: C2H6 + O2 --> ?
H2O + O2
CO2 + H2O
C + O2
CO2 + H2O2
CH + O2
Predict the products from this reaction: KCl + Mg --> ?
MgCl2 + K2
K2Mg + Cl2
MgCl2 + K
KCl + Mg
MgCl + K
Predict the products from the following reaction:
KCl + Na2SO4
NaK + SO4Cl
K2SO4 + NaCl
KaS + ClONa
KN + a
Predict the products from the following reaction:
NaCl + Cu -->
NaCl + Cu
CuCl2 + Na
NaCu + Cl2
CuCl + Na
Na + Cl2 + Cu
What element is required for a combustion reaction?
nitrogen
hydrogen
silicon
oxygen
carbon
In this reaction, how many oxygens are there on each side?
Al(NO3)3 + 3Na --> 3NaNO3 + Al
10
9
7
3
We have to balance formulas due to the law of conservation of ____
mass/matter.
energy.
temperature.
mete.
What do we call things on the left side of a chemical reaction? For example: 2Na + Cl2 --> 2NaCl
Na and Cl2 are on the left side. Again, what do we call these things?
left elements
left overs
products
reactants
chemicals
The new substances formed in a chemical reaction are called
Reactants
Atoms
Products
Reagents
In a chemical reaction...
New atoms are created
Atoms rearrange
Atoms are destroyed
Nothing Happens
What are the coefficients that will balance the skeleton equation below?
AlCl3 + NaOH → Al(OH)3 + NaCl
1,3,1,3
3,1,3,1
1,1,1,3
1,3,3,1
James, Arjun, and Elijah are studying chemistry together. They are confused about the difference between a subscript and a coefficient in a chemical equation. Can you help them understand?
A subscript indicates the number of atoms James, Arjun, and Elijah are using in their reaction, while a coefficient indicates the number of atoms in a compound they have.
A subscript indicates the number of molecules or formula units in a compound that James, Arjun, and Elijah have, while a coefficient indicates the number of atoms in their reaction.
A subscript indicates the number of molecules or formula units in a reaction that James, Arjun, and Elijah are conducting, while a coefficient indicates the number of atoms in a compound they have.
The difference between a subscript and a coefficient in a chemical equation is that a subscript indicates the number of atoms in a compound that James, Arjun, and Elijah have, while a coefficient indicates the number of molecules or formula units in their reaction.
Kai, Lily, and Michael are conducting a chemistry experiment. They are trying to understand what reactants are in a chemical equation. Can you help them?
Substances that they add to the chemical reaction after it has started.
Substances present at the beginning of their chemical reaction that are used up to form products.
Substances present at the end of their chemical reaction that are formed from products.
Substances that are not involved in their chemical reaction.
Which best represents a balanced equation?
120 grams of carbon plus 20 grams of oxygen → 200 grams of carbon dioxide
120 grams of carbon plus 50 grams of oxygen → 200 grams of carbon dioxide
120 grams of carbon plus 80 grams of oxygen → 200 grams of carbon dioxide
