Question

For  balancing  the  given  chemical  equation,  the  coefficient  of  oxygen  (02)  is
C3  H8  +  O2  →  Co2  +  H2O
a)  3 b)  4 c)  5 d)  6

Answer 1

the balance equation is
C3H8+5O2 ---→ 3CO2+4H2O
answer is
c)5

Answer 2

For balancing the given chemical equation, the coefficient of oxygen is 5.

Explanation:

• The balanced reaction is the one in which the number of atoms involved in reaction in reactants as well as the product is equal.
• The given reaction is as follows:

$C_3H_8+O_2\rightarrow CO_2+H_2O$

• As per the given equation, in the reactant side, two oxygen atoms are present whereas in the product side 3 oxygen atoms are present.
• To make both sides equal the following additions are made:

$C_3H_8+5O_2\rightarrow 3CO_2+4H_2O$

• When the above-given reaction is examined, in the reactants side there is 10 oxygen atom, whereas in the product side there are 10 (6+4).
• Thus it can be inferred that coefficient of oxygen to balance the reaction is option c - 5.

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