“Write chemical reactions” When sodium (Na), in a solid state, reacts with an aqueous sulfuric acid solution (H2SO4), the gas hydrogen (H2) is released, in addition to producing sodium sulfate (Na2SO4) in an aqueous solution: a) Write out the chemical equation for this reaction, specifying the state of aggregation of each substance. b) Which substances are reagent and which are products? c) How many atoms are there in each chemical element on both sides of the chemical equation?

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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.

Calculate the number of moles of ethane in 100 grams