Research some ways in which scientists and engineers have harnessed and currently use the energy in fossil fuels to benefit society. think about how these methods involve a chemical reaction, and explain how energy is conserved. describe one method of using fossil fuels for energy, and state one advantage and disadvantage about this method. in your replies to others' comments, state whether you agree or disagree with the advantages and disadvantages they list and explain your reasoning.

hint: consider what happens to fossil fuels (such as coal, natural gas, and petroleum) when they are burned.

The pressure in a fluid is affected by which characteristics of that fluid

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.

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water