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

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

This element exists in adundance in the sun.explain how you would go about capturing sunlight.would this captured sunlight contain any of the element?

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li