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Which reaction is an example of a synthesis reaction?

Question 1 options:

4H+O2→2H2O 


C7H16+11O2→7CO2+8H2O


Cl2 + 2NaBr→ Br2 + 2NaCl 


2Na + 2H2O→2NaOH + H2

Question 2 (1 point)
Which statement is true about synthesis reactions?

Question 2 options:

They must have one or more reactants.


They must have two or more reactants.


They must have more than one product.


They must have two or more products.

Question 3 (1 point)
Why is Cl2 + KI→ KCl +I2  not a synthesis reaction?

Question 3 options:

Oxygen is not a product in this reaction.


Oxygen is not a reactant in this reaction.


The reaction has more than one product.


The reaction has more than one reactant.

Question 4 (1 point)
Which equation is the balanced chemical equation for the synthesis reaction for the formation of sulfur dioxide (SO2) ?

Question 4 options:

2S + O2→SO2


S + 2O2→4SO2


S + O2→SO2


S + O2→2SO2

Question 5 (1 point)
Which of the following represents the balanced chemical equation for the synthesis reaction that forms magnesium oxide?

Question 5 options:

Mg+O2→MgO


2Mg+2O2→2MgO


2Mg+O2→2MgO


2Mg+3O2→3MgO

Answer :

SvetkaChem

Answer:

1.a, 2.b, 3. c, 4. c, 5. c

Explanation:

1.

4H+O2→2H2O 

2.

They must have two or more reactants.

3.

The reaction has more than one product.

4.

S + O2→SO2

5.

2Mg+O2→2MgO

pstnonsonjoku

The balanced chemical reaction equation that represents the synthesis of magnesium oxide is 2Mg+O2→2MgO.

A synthesis reaction is one in which two substances or more come together in a chemical reaction to form one  new substance. The reaction 4H+O2→2H2O , is a synthesis reaction. Hence, a true statement about a synthesis reaction is that they must have two or more reactants. The reaction Cl2 + KI→ KCl +I2  is not a synthesis reaction the reaction has more than one product.

A balanced reaction equation is one in which the number of atoms of each reactant on both sides of the reaction equation is exactly the same. The reaction S + O2→SO2 is a balanced reaction equation.

The balanced chemical reaction equation that represents the synthesis of magnesium oxide is 2Mg+O2→2MgO.

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