Calculate the mass of ethylene glycol (c2h6o2) that must be added to 1.00 kg of ethanol (c2h5oh) to reduce its vapor pressure by 11.0 torr at 35 ∘c . the vapor pressure of pure ethanol at 35 ∘c is 1.00×102 torr .

1. baking powder is a 1: 1 molar mixture of cream of tartar (khc4h4o6) and baking soda (nahco3). a recipe calls for two teaspoons (a total of 8.0 grams) of cream of tartar. how much baking soda must be added for both materials to react completely?

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

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?