In TLC lab when you separated spinach pigments', most sections found 45:55 acetone:hexanes mobile phase composition to give the best results. In column chromatography, the best mobile phase turned out to be 40:60 or 35:65 acetone:hexanes. What is the reason that the exact mobile phase composition from TLC does not give the best separation in column chromatography. Explain

150.0 grams of asf3 were reacted with 180.0 g of ccl4 to produce ascl3 and ccl2f2. if the actual yield of ccl2f2 was 127 g, what is the percent yield?

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

Which of the following describes a situation where competition between producers exists