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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

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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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

b. heterotroph

explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands