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What is the correct ratio of dissociated and undissociated components to make 0.5 L of 0.2 M phosphate buffer, pH 7.7. The correct answer is 8/1, but I'm confused on how to solve the problem.
A smple of mixture of NaCl, Caco3 and SiO2 weighed 7.30 grams. During the water wash the sample lost 2.21 grams. After treatment with HCL, the sample weighed 2.05 grams. a. What is the perecent of NaCL by mass in the sample
What chemical features and properties of detergents make them better than soap for hard water application?
Experimental write up without changing our kinetics calculation. Write the structure of another other organic products that might be produced from the carbocation intermediate in this reaction.
When 0.156 mol of urea, nonelectrolyte whose MM=60.1 and whose density=1.48g/cm3,is dissolved in 131g of water, the molality of the solution is
Suppose that a 2.00-L metal bottle that contains air at 113K and 2.5 atm pressure is sealed off. If we inject 60.0 mL of liquid helium and allow the entire system to warm to room temperature (25°C), what is the pressure inside the bottle?
the background section describes why you want the bleach to be far in excess of the dye. state how much greater the
Fuel is a mixture of different hydrocarbon compounds containing only hydrogen and oxygen. Calculate the volume of carbon dioxide, at 300 °C and 100 kPa, passing through a vehicle's exhaust during the combustion of a full tank of fuel
Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition?
Capsaicin, the compound that gives the hot taste to chili peppers, has the formula C18H27NO3. (a) Calculate its molar mass.
If 2.3g of sodium reacted with 1.8 of water, what would be the total mass of sodium hydroxide and hydrogen produced?
Consider the titration of 100ml of .100M H2NNH2 (Kb=3.0*10^-6) by .200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added
toothpaste contains 0.24% by mass sodium flouride used to prevent dental cavities. One tube contains 119g of toothpaste. How many moles of NaF are in the tube?
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