SEP Design Your Solution Biosphere 2 was an attempt to have humans live within a perfectly closed system , as a model for living on other planets . The first attempt failed because the system began losing C*O_{2} , which was chemically reacting with the exposed concrete walls . How would you go about designing a habitat that is a closed system ? Explain how matter and energy would flow within the system .

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.