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

If 10.0 ml of the solution on the right are withdrawn from the 100 ml beaker and diluted again in a similar manner, what is the new concentration? m nacl

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Compare and contrast physical changes with chemical changes.