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

Compare and contrast physical changes with chemical changes.

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

Which metals are called noble metals