**Answer:**

the product and the reactant must be balanced

if u are required to give the mechanism if the reaction it must be written

**Answer:**

0.5 M

**Explanation:**

Molar concentration : M = n/v

n = moles of solute

v = liters of solution

Hence, 5.0 / 10.0 = 0.5 M

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The first step is to **balance the equation:**

<span>**C3H8 + 5O2 ---> 3CO2 + 4H2O **

Check the balance

element left side right side

C 3 3

H 8 4*2 = 8

O 5*2=10 3*2 + 4 = 10

Then you have the **molar ratios:**

**3 mol C3H8 : 5 mol O2 : 3 mol CO2 : 4 mol H2O**

Now you have 40 moles of O2 so you make the **proportion:**

**40.0 mol O2 * [3 mol CO2 / 5 mol O2] = 24.0 mol CO2.**

**Answer: option D. 24.0 mol CO2 **

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