Which type of galaxy contains mostly new stars because it has lots
of dust and gas

What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 h 8 ) (density = 0.867 g/ml) to a 250 ml volumetric flask, and then filling to the mark with benzene (c 6 h 6 ) (density = 0.876 g/ml)?

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .