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Calculate the boiling point of a solution containing 50.0 g of KCl and 550.0 g of water. (kb for water is 0.51C/m).
All of the following reaction conditions would generally increase the rate of a chemical reaction, EXCEPT: A) changing the reactants from a liquid state to a gas state B) increasing the temperature of the reaction
A solution of ammonia and water contains 4.70×10^25 water molecules and 7.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution
A perfect gas has a constant volume molar heat capacity of CV,m = 1.5× R, and a constant pressure molar heat capacity of Cp,m = 2.5× R. For the process of heating 4.50 mol of this gas with a 12 W heater for 400 seconds, calculate
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.49. What was the concentration of the solution? The Ka of lactic acid is 1.4 10-4.
How many moles of Allyl Sulfide (C3H5)2S in 23.2g? How many H atoms are in 0.85 mole of allyl sulfide?How many atoms of Carbon are in 4.20 X 10^23 molecules of allyl sulfide.
A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound?
Identify which of the following are oxidation-reduction reactions, and if they are, identify the oxidizing agent, the reducing agent, the substance being oxidized, and the substance being reduced.
compute the band gap for this semiconductor material after consideing an intrinsic semiconductor with a conductivity
The change in the Gibbs energy of a certain constant-pressure process as a function of temperature was found to fit the expression ?G (J K-1)=-73.1 J +42.8T. Calculate the value of S for the process.
A 46.2mg sample of phosphorus reacts with selenium to form 135mg of the compound. What is the empirical formula of the phosphorus selenide
why is it important to standardize NaOH solution instead of taking an accurate and diluting it in a volumetric
A 224mL sample of an aqueous solution contains 2.80% MgCl2 by mass. Exactly one-half of the magnesium ions are Mg?28, a beta emitter with a half-life of 21 hours
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