65.1k views
1 vote
A chemical equation is balanced by changing or adding

a.
chemical symbols.
c.
numbers in front of molecules.
b.
subscripts after atoms.
d.
reactants in the product.

2 Answers

4 votes

Answer:

a.

chemical symbols.

Step-by-step explanation:

User Cao Lei
by
8.2k points
6 votes
A chemical equation is balanced by changing or adding C. numbers in front of molecules, which are called coefficients.
For example:
O2 + 2 H2 ---> 2 H2O (number 2 is added to both sides in order to balance the equation)
User Myro
by
8.4k points
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