Question

In balancing a chemical equation, which of the following are you allowed to do?
(a) add coefficients
(b) and new substances
(c) change superscripts
(d) change subscripts

Answer 1

Answer:

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Answer 2

Adding coefficients is used to balance a chemical equation.(Option - A)

• Coefficients are added in front of atoms to balance their number on both sides of the reaction i.e. the reactant and the product side.
• The number of a particular atom must be balanced on both sides of the reaction.
• New substances cannot be added on either side of the reaction, only the atoms are rearranged in order to form a product from a particular reactant.
• Superscripts mostly represent the charge of a molecule which is changed only in reactions involving the transfer of electrons from 1 atom to another i.e. redox reactions but the transfer of electrons is also balanced across the reaction from 1 atom to another different molecule or atom. Moreover, this is not a way of balancing.
• Subscripts of particular molecules are fixed depicting the bonding of atoms to form the molecule and it cannot be changed during balancing a chemical equation.