En un vaso se han puesto 250 g de alcohol junto con 2 g de yodo, que se disuelven comletamente. a: Calcula la concentración de la disolución en % masa.
b: ¿Cuántos gramos de disolución habrá que coger para que al evaporarse el alcohol queden 0,5 g de yodo sólido?
c: si tomamos 50 g de disolución y dejamos evaporar el alcohol. ¿cuántos g de yodo quedan?

The density of glycerin is 1.26grams/centimeter cubed . how many is this? use the conversion rates of and . express your answer to the correct number of significant figures.

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.