Will give brainlest to first correct QUIZ! HELP ASAP ANSWER ALL FOR 50 POINTS!!
Which of the following chemical equations is balanced?
A. H2 + Cl2 4HCl
B. 4H2 + 2O2 2H2O
C. 4Fe + 3O2 2Fe2O3
D. 2Fe + HCl FeCl2 + H2
Which of the following chemical equations is balanced?
A. P4 + O2 P2O3
B. CF4 + Br2 CBr4 + F2
C. MgF2 + Li2CO3 MgCO3 + 2LiF
D. Na3PO4 + KOH NaOH + K3PO4
How many copies of F2 are required to balance this chemical equation?
N2 + F2 2NF3
A. 3
B. 4
C. 5
D. 6
How many copies of F2 are required to balance this chemical equation?
N2 + F2 2NF3
A. 3
B. 4
C. 5
D. 6
How many copies of O2 are required to balance this chemical equation?
P4 + __O2 2P2O3
A. 1
B. 2
C. 3
D. 4
Which of the following chemical equations is unbalanced?
A. N2 + 2H2 2NH3
B. 2H2 + O2 2H2O
C. P4 + 5O2 P4O10
D. 4Na + O2 2Na2O
Which is the balanced chemical equation representing the reaction between sodium metal and chlorine gas?
Na + Cl2 NaCl
A. Na + Cl2 NaCl
B. Na + Cl2 2NaCl
C. 2Na + Cl2 NaCl
D. 2Na + Cl2 2NaCl

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

Part 1 :

Option C reaction : [tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

In the given options, option (C) reaction is a balanced chemical reaction because in this reaction the number of atoms of individual elements present on reactant side are equal to the product side.

Part 2 :

Option C reaction : [tex]MgF_2+Li_2CO_3\rightarrow MgCO_3+2LiF[/tex]

In the given options, option (C) reaction is a balanced chemical reaction because in this reaction the number of atoms of individual elements present on reactant side are equal to the product side.

Part 3 :

In the reaction reaction, there are 2 atoms of nitrogen in both side of the reaction and there are 6 atoms of fluorine atoms on product side of reaction. So, in order to balance the chemical equation, the coefficient '3' is put before [tex]F_2[/tex]. Thus, the balanced chemical reaction will be:

[tex]N_2+3F_2\rightarrow 2NF_3[/tex]

Hence, the correct option is, (A) 3

Part 4 :

In the reaction reaction, there are 4 atoms of phosphorous in both side of the reaction and there are 6 atoms of oxygen atoms on product side of reaction. So, in order to balance the chemical equation, the coefficient '3' is put before [tex]O_2[/tex]. Thus, the balanced chemical reaction will be:

[tex]P_4+3O_2\rightarrow 2P_2O_3[/tex]

Hence, the correct option is, (C) 3

Part 5 :

Option A reaction : [tex]N_2+2H_2\rightarrow 2NH_3[/tex]

In the given options, option (A) reaction is an unbalanced chemical reaction because in this reaction the number of atoms of hydrogen present on reactant side are equal to the product side.

Part 6 :

When sodium metal react with chlorine gas then it react to give sodium chloride as a product.

The balanced chemical reaction will be:

[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]

Hence, the correct option is, (C)