HELP! URGENTLY NEEDED! The coefficient/s will balance the chemical equation CH4 +O2 » CO2 + H2O is

a
1, 2, 1, 2
b
2, 1, 1, 2
c
2, 2, 1, 1
d
1, 1, 1, 2

The coefficients : a. 1,2,1,2

Given

Reaction(unbalanced)

CH4 +O2 » CO2 + H2O

Required

The blanced equation

Solution

Give a coefficient

CH4 +aO2 » bCO2 + cH2O

Make an equation

C, left=1, right=b⇒b=1

H, left=4, right = 2c⇒2c=4⇒c=2

O, left=2a, right=2b+c⇒2a=2b+c⇒2a=2.1+2⇒a=2

The equation becomes :

CH4 +2O2 » CO2 + 2H2O

the answer is   c.) 1575 j.

explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.