Determina cuantos gramos de agua se necesitan para disolver 40 g de café si se quiere obtener una disolución a 4% en masa de café

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?

Select all the correct answers.which compounds have the empirical formula ch20? (multiple answers)a.c2h4o2b.c3h603c.ch2o2d.c5h1005e.c6h1206

Moving force of air flows from areas of high pressure to areas of low pressure true or false