Americans combined drive about 4.0 x 109 kilometers a day and get an average of 20 miles per gallon of gasoline. for each kilogram of gasoline that is burned about 3 kg of carbon dioxide (co2) are produced. with the density of gasoline as 0.93 g/cm3, how many kg of co2 are emitted by u. s. cars into the atmosphere each minute? (1 gallon = 3.7854 l, 1 mile = 1.609 km)

a. 9.12 x 105 kg co2/min
b. 5.47 x 107 kg co2/min
c. 4.7 x 109 kg co2/min
d. 4.38 x 106 kg co2/min

of carbon dioxide gas.

Explanation:

Average distance covered by Americans in a day=

1 day = 24 × 60 min = 1,440 min

Average distance covered by Americans in a minute=

Average mileage of the car = 20 miles/gal = 32.18 km/gal

1 mile = 1.609 km

20 miles = 20 × 1.609 km = 32.18 km

Volume of gasoline used in minute =

(1 L = 1000 mL)

Mass of 86,320.00 gallons of gasoline = m

Density of the gasoline = d =

1 kilogram of gasoline gives 3 kg of carbon dioxde gas .

Then 303,882.84649 kg of gasoline will give :

of carbon dioxide gas.

b

explanation:

mitosis

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"