for the reaction: c3h8+5o2=3co2 +4h2o how many moles of o2 will be produced in the complete combustion of 0.75 moles of c3h8?

I think the ans is 2.25 moles of co2, but i am not sure because i still don't think I understand this fully please help

Surely.

I think you meant how many moles CO2 and not O2. Use the coefficients in the balanced equation.
0.75 moles C3H8 x (3 moles CO2/1 mole C3H8) = 0.75 x 3/1 = 2.25 moles CO2.

Thank you DrBob222,

For the reaction C3H8+5CO2=3CO2+4H2O
How many moles of C3H8 are needed to produce 1.50moles of CO2? I think the ans is 0.5 molesC3H8

To determine how many moles of O2 will be produced in the complete combustion of 0.75 moles of C3H8, we need to use the balanced equation for the reaction:

C3H8 + 5O2 = 3CO2 + 4H2O

From the equation, we can see that the ratio between C3H8 and O2 is 1:5. This means that for every 1 mole of C3H8, we need 5 moles of O2.

Now, let's calculate the number of moles of O2 for 0.75 moles of C3H8:

0.75 moles C3H8 * (5 moles O2 / 1 mole C3H8) = 0.75 * 5 = 3.75 moles O2

Therefore, in the complete combustion of 0.75 moles of C3H8, 3.75 moles of O2 will be produced.

To determine the number of moles of O2 produced in the complete combustion of 0.75 moles of C3H8, we need to use the balanced equation provided.

The balanced equation for the combustion of C3H8 is: C3H8 + 5O2 -> 3CO2 + 4H2O

From the balanced equation, we can see that the ratio of C3H8 to O2 is 1:5. This means that for every 1 mole of C3H8, we need 5 moles of O2.

Given that we have 0.75 moles of C3H8, we can calculate the moles of O2 needed using the ratio above:

0.75 moles C3H8 * (5 moles O2 / 1 mole C3H8) = 3.75 moles O2

Therefore, in the complete combustion of 0.75 moles of C3H8, 3.75 moles of O2 will be required.