Which answer choice represents a balanced alpha emission nuclear equation? a. 52 26 fe --> 52 25 mn+ 0 ⁺1 e. b. 235 92 u --▻ 239 94 pu + 4 2 he c. 189 83 bi --▻ 185 81 tl + 4 2 he d. 14 6 c --▻ 14 7 n + 0 -1 e

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.

What is the molar mass of potassium nitrate, kno3

Stage in which a star’s outer layers have started to cool and grow outward?