Determine whether or not the equation below is balanced. S8 +24F2 yields to 8SF six. If it isn't balanced, balance it. identify the reactants and products. label which one of the five types of reactions it is.

Evaluate this exponential expression,8. (2 + 3)2 – 42

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.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?