Which food dyes in the diagram on the right only contain one colour?
( Science, Chromatography )​

The same side of the moon always faces earth because the

Give more examples of this type of heat transfer:

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.