What is the concentration of the diluted solution after 0.350 mol/L NaCl is diluted in 1:270 dilution?

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

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?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?