Chemistry, 11.07.2019 19:00 twilov2878

If an automobile travels 225 mi with a gas mileage of 21.5 mi/gal , how many kilograms of co2 are produced? assume that the gasoline is composed of octane, c8h18(l), whose density is 0.69 g/ml.

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Answer from: SamaHafiz8984

- 84.2 kg of carbon dioxide.

Solution:- Distance and car mileage are given from which we could calculate the fuel required to cover the given distance. With the help of the given fuel density and fuel calculated volume the mass of fuel that is octane could be calculated. Some unit conversions are also done here. After this by writing balanced combustion equation and using stoichiometry the amount of carbon dioxide produced could easily be calculated.

The calculations are shown below:

$225mile(\frac{1gallon}{21.5mile})(\frac{3.785L}{1gallon})(\frac{1000mL}{1L})(\frac{0.69gram}{1mL})$

= 27331.22 g of octane

The balanced equation for the combustion of Octane is:

$2C_8H_1_8+25O_2\rightarrow 16CO_2+18H_2O$

We will use dimensional analysis here also to solve for mass of carbon dioxide formed. Grams of octane are converted to moles and then using mole ratio the moles of carbon dioxide are calculated. Moles are converted to grams on multiplying by molar mass and then finally the grams are converted to kilograms as:

$27331.22gC_8H_1_8(\frac{1moleC_8H_1_8}{114.23gC_8H_1_8})(\frac{16moleCO_2}{2moleC_8H_1_8})(\frac{44gCO_2}{1moleCO_2})(\frac{1kg}{1000g})$

= 84.2kgCO_2

So, 84.2 kg of carbon dioxide would be produced by an automobile.

Answer from: Quest

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

Answer from: Quest

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. $hbr$ completely dissociates to $h^+$ and $br-$ ions. a is incorrect because $h_2s$ does not fully ionize to $h^+$ and $hs^-$ ions and some remain as the compound $h_2s$ . c and d are incorrect because, $li_2o$ and $libr$ do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise, if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both $li_2o$ and $libr$ have a complete octet so can not accept any electrons which disqualifies them as acids.

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If an automobile travels 225 mi with a gas mileage of 21.5 mi/gal , how many kilograms of co2 are pr...