8. 250 ml of a 10% solution with a density of 1,05 g / ml still dissolved in 11,2 g of potassium chloride. What is the percentage concentration of potassium chloride? 9. What volume of solution will we prepare if the concentration is 1 mol / l and we have 73 g of HCl?

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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?