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 CO2, 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.

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree

Phosphoric acid is a triprotic acid ( =6.9×10−3 , =6.2×10−8 , and =4.8×10−13 ). to find the ph of a buffer composed of h2po−4(aq) and hpo2−4(aq) , which p value should be used in the henderson–hasselbalch equation? p k a1 = 2.16 p k a2 = 7.21 p k a3 = 12.32 calculate the ph of a buffer solution obtained by dissolving 18.0 18.0 g of kh2po4(s) kh 2 po 4 ( s ) and 33.0 33.0 g of na2hpo4(s) na 2 hpo 4 ( s ) in water and then diluting to 1.00 l.