3. The heat of neutralization for an acid and a base is exothermic, meaning heat is given off. Since you did not build a perfect calorimeter, some heat will likely be lost to the environment instead of
measured, how will this affect your calculated value of AH neut? Explain.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

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.

The excretory system,need answers for all: )