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?

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Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.