Octadecane C18H38 is a component of diesel. Its concentration in a sample of rainwater was found to be 0.3 ppb (parts per billion). If the density of water is 1g mL-1 find the molar concentration of C18H38?

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?