Plants use nutrients from the soil to produce energy. in this example, which two spheres does energy flow between?

a) biosphere to atmosphere
b) biosphere to geosphere
c) geosphere to biosphere
d) hydrosphere to biosphere

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Amixture with the same composition throughout is!

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.