Se requiere preparar una solución al 20% m/v y se sabe que el volumen total de dicha solución es de 250ml ¿Cuánta masa de soluto se nesesita?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Compare and contrast refraction of light and sound will give brainliest

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out