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

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

Find the number of moles of argon in 364g of argon.