Can someone help me with this? Why do cars emit so much carbon dioxide? One liter of petrol (its density 0.7 g / cm) emits about 2.4 kg of carbon dioxide. Is it possible that the mass of carbon dioxide emitted during fuel combustion is much higher than the mass of gasoline consumed? Support this hypothesis with chemical equations and calculations. (a) Petrol is a mixture of hydrocarbons. Suppose a hydrocarbon molecule consists of 8 carbon C atoms and 18 hydrogen H atoms. Write down the formula for this compound. b) When gasoline burns, carbon and hydrogen atoms combine with oxygen O atoms. Write down the formulas of the compounds formed and the hydrocarbon combustion reaction equation. Equalize the coefficients. c) Calculate the masses of hydrocarbon and carbon dioxide formed. Compare them. Remember that the coefficients of the reaction equation show not only the number of molecules but also the number of moles.​

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.