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When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. gof water, the solution has a freezing point of -0.47°C.What is the molar mass of glucose? Kf of water is1.86°C/m.
A biochemist needs 750 mL of an acetic acid-sodium acetate buffer with pH = 4.50. Solid sodium acetate NaC2H3O2 and glacial acetic acid HC2H3O2 are available. Glacial acetic acid is 99% HCH3O2 by mass and has a density of 1.05 g/mL.
Suppose that the microwave radiation has a wavelength of 12.7 cm. How many photons are required to heat 200. mL of coffee from 25°C to 62°C?
When 50 mL of 2M HCl(aq) is added to 50 mL of 2M NH3(aq), how much NH4Cl is formed?
How many liters of the antifreeze ethylene glycol [CH2(OH)CH2(OH)] would you add to a car radiator containing 6.50 L of water if the coldest winter temperature in your area is -28°C? (The density of ethylene glycol is 1.11 g/mL
The latent heat of vaporization of mercury is around 300,000 J/kg. What is the least amount of mercury (in kg) that can be vaporized when 3 million joules are introduced?
Solutions, suspensions, and colloids all have solutes interacting with solvents. Which have solute particle diameters below 1,000nm. a. solutions
Calculate the pH during the titration of 40 mL of 0.1M HCL with 0.1M NaOH solution after the following additions of base:
What is the percent yield of a reaction in which 212 g phosphorus trichloride reacts with excess water to form 109 g HCl and aqueous phosphorus acid (H3PO3)?
Assuming that the microwave ovens emit radiation with a wavelength of 12.2 cm, calculate how many photons are emitted per second in a 1000-Watt microwave oven.
how many polypeptide products would you expect to create if it is treated with LysC? Briefly explain why. ii) What would be the approximate molecular weight of the different peptide products
how many grams of sucrose, c12h22o11, must be dissolved in 750 ml of water to prepare a 0.250 molal solution?
How much heat (in ) is required to warm 12.0 g of ice, initially at -11.0 degrees C, to steam at 111.0 degrees C? The heat capacity of ice is 2.09 and that of steam is 2.01 J/gC.
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