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1. A 19 mL sample of a solution of Li2S was diluted with water to 81 mL. A 25 mL sample of the dilute solution was found to contain 0.9 M Li+. What was the concentration of Li2S in the original undiluted solution?
2. What is being calculated when the volume of the solution in liters is multiplied by the molarity of a solute in a solution?
The moles of solute in the solution
The moles of solution
The milliliters of volume in the solution
The molarity of the solute in the solution
The liters of solute in the solution
The volume of the solution in liters
The milliliters of water in the solution
The moles of water in the solution
If a typical antacid tablet contains 2.0 g of sodium hydrogen carbonate, how many moles of carbon dioxide should one tablet yield?
Draw chemical structures to explain why a water molecule might be essential to producing a stable crystal of caffeine.
If the oven uses microwave radiation of wavelength 12.2 cm, how many photons of this radiation are required to heat 1.28 g of water 1.00°C, assuming that all the photons are absorbed?
Which of the following correctly describes Tollens' reagent? a. a solution of silver nitrate in water b. a solution of silver nitrate and ammonia in water c. a solution of silver nitrate in hydrochloric acid d. none of the above correctly describe..
The difference between the energy of the products and the energy of the reactants D. Undefined because it depends on whether the reaction is endothermic or exothermic
The hydrogen gas formed in a chemical reaction is collected over water at 30 at a total pressure of 737. What is the partial pressure of the hydrogen gas collected in this way
What is the order of the reaction if it takes 10 minutes, 20 minutes, 30 minutes to reach 75% conversion?
you have a 100.0-ml graduated cylinder containing a 50-ml of water. you drop a 142-g piece of brass density 8.56gcm3
Balance the following equation in acidic solution- H2S(g) + NO3-(aq) ? S8(s) + NO(g) What is the coefficient of water
Upon opening the stopcocks what is the partial pressure of each gas and the total pressure inside the apparatus. Assume that the volume of the stopcocks and the tubing connecting the bulbs is negligible.
2-butene-1-thiols is one component of skunk spray. How whould you synthesize this substance from methyl 2-buenoate? From 1,3-butadiene
Determine the point group of each of the three possible geometries of the hypothetical Be3+ on, ten draw the molecular orbitals for each geometry,
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