When one molecule of propane, C 3 H 8 , burns in a gas grill, it combines with f

Question

When one molecule of propane, C3H8, burns in a gas grill, it combines with five oxygen molecules to form three CO2 molecules and four H2O molecules. Select the statement below that is incorrect in regard to this reaction. Answer A. If five propane molecules react, 15 CO2 molecules will be formed. B. If 12 CO2 molecules are formed, then four propane molecules must have reacted. C. The balanced equation for the reaction is C3H8 + 5O2 ? 3CO2 + 4H2O. D. If five propane molecules react, 25 O2 molecules must also react. E. If 15 O2 molecules react, 9 H2O molecules will be formed. When one molecule of propane, C3H8, burns in a gas grill, it combines with five oxygen molecules to form three CO2 molecules and four H2O molecules. Select the statement below that is incorrect in regard to this reaction. When one molecule of propane, C3H8, burns in a gas grill, it combines with five oxygen molecules to form three CO2 molecules and four H2O molecules. Select the statement below that is incorrect in regard to this reaction. If five propane molecules react, 15 CO2 molecules will be formed. If 12 CO2 molecules are formed, then four propane molecules must have reacted. The balanced equation for the reaction is C3H8 + 5O2 ? 3CO2 + 4H2O. If five propane molecules react, 25 O2 molecules must also react. If 15 O2 molecules react, 9 H2O molecules will be formed. A. If five propane molecules react, 15 CO2 molecules will be formed. B. If 12 CO2 molecules are formed, then four propane molecules must have reacted. C. The balanced equation for the reaction is C3H8 + 5O2 ? 3CO2 + 4H2O. D. If five propane molecules react, 25 O2 molecules must also react. E. If 15 O2 molecules react, 9 H2O molecules will be formed.

Explanation / Answer

general reaction to burn propane:

C3H8 + 5 O2 = 3 CO2 + 4 H2O given

A)If five propane molecules react:

coefficients of all molecules will be multiplyed by 5 so as to make the coefficient of C3H8 as 5 .

so we have,

5 C3H8 + 25 O2 = 15 CO2 + 20 H2O we can see 15 CO2 molecules are formed so A is Correct

B)

If 12 CO2 molecules are formed to make this multiply the whole equation by 4. so we have,

4 C3H8 + 20 O2 = 12 CO2 + 16 H2O

so we can see four propane molecules have reacted.

so B is Correct

C)The balanced equation for the reaction is C3H8 + 5O2 ? 3CO2 + 4H2O. as you see this equation matches the given valu an that is balanced also ,So this is Correct

D)

If five propane molecules react:

coefficients of all molecules will be multiplyed by 5 so as to make the coefficient of C3H8 as 5 .

so we have,

5 C3H8 + 25 O2 = 15 CO2 + 20 H2O we can see 25 O2 molecules are reacted so D is Correct

E)

If 15 O2 molecules react,

coefficients of all molecules will be multiplyed by 3 so as to make the coefficient of O2 15.

so we have,

3 C3H8 + 15 O2 = 9 CO2 + 12 H2O we can see

12 H2O molecules will be formed

for this ithe given data is INCORRECT

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