Fill in the following table using the options below. some items may be used more than once! you may use the periodic table and the information you learned in this lesson. element symbol protons electrons neutrons atomic mass atomic num net charge oxygen drop answer here drop answer here drop answer here 8 drop answer here 8 -2 drop answer here drop answer here 20 20 drop answer here drop answer here 20 drop answer here

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.

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

What is the name of the enzyme that forms at the start of transcription?