You have a mixture that is soluble only in 100% mtbe. you want to run your column in 5% mtbe/hexanes. which method of column loading should you use in this case and why?

indium, and thallium have three electrons i think

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.