Roasted copper ore containing cus04 is to be extracted in a counter-current stage extractor using pure water each hour, 100 tons of roasted copper ore, which contains 90 wt.% inert solids, 8 wt% cuso4 and 2 wt% of water is to be treated. the strong solution produced is to consist of 20 wt% cuso4. the recovery of cuso4 from the ore is 95 %. after each stage, 1 ton of inert solids retain 0.25 ton of water (just water) in addition to the copper sulfate dissolved in water. equilibrium is attained in each stage.

Which of the following statements concerning the influence of culture on ethnic identity formation is accurate? a. one will reject ethnic identity if cultural stereotypes are encountered. b. if one’s ethnic city is different from the dominant cultural group, then one’s ethnic identity you will become weekend. c. if an the ethnic group is excepted by dominant culture, then ethnic identity formation can be a difficult process. d. similarity to the dominant culture can determine how easy it is for one to except ethnic differences.

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g