examine the chemical reaction.\n$c_{3}h_{8}+o_{2}\to4h_{2}o + 3co_{2}$\nwhat coefficient of $o_{2}$ should…
examine the chemical reaction.\n$c_{3}h_{8}+o_{2}\to4h_{2}o + 3co_{2}$\nwhat coefficient of $o_{2}$ should be added so the number of atoms of oxygen is conserved on both sides of the reaction equation?\n3\n5\n7\n10
Answer
Explanation:
Step1: Count oxygen atoms on right - hand side
On the right - hand side, in $4H_2O$, the number of oxygen atoms is $4\times1 = 4$, and in $3CO_2$, the number of oxygen atoms is $3\times2=6$. So the total number of oxygen atoms on the right - hand side is $4 + 6=10$.
Step2: Determine coefficient of $O_2$
Let the coefficient of $O_2$ be $x$. Each $O_2$ molecule has 2 oxygen atoms. So we have the equation $2x=10$. Solving for $x$, we get $x = 5$.
Answer:
5