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Calculate the pH of a 0.50 M aqueous solution of NH3. The Kb for NH3 is 1.8 x 10-5.
You need to produce a buffer solution that has a pH of 5.10. You already have a solution that contains 10 mmol (millimoles) of acetic acid.
a system conducts 192 cal of heat to the surroundings while delivering 322 cal of work. what is the change in internal energy of the system (in cal)?
The density of hydrogen gas in a flask is 0.147 g/L at 305 K. what is the pressure inside the flask? Calculate the density in G/L of CH4(g) at 75 Celsius and 2.1 atm (R= .08206 L*atm/mol*K).
Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 3.12 moles of CO2 react completely?
An experiment requires 44.0 g of ethylene glycol, a liquid whose density is 1.114 g/mL. Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
it is observed that a volume of 29.15 mL of KOH was neede to complete the process of titration. Determine what is the concentration of this unknown HCl solution?
When equilibrium is reached at 700C, the total pressure of the system is found to be 4.00 atm. If the equilibrium constant Kp for this reaction is equal to 1.52,
The solubility product of PbBr2 is 8.9 10-6. Determine the molar solubility in the following. (a) pure water
Im really confused about spectroscopy and need an introduction on what it is and what these types of problems mean.
explain in detail, using thermodynamics principles, why the mixing of pure chemicals to form homogeneous mixture is a so-called spontaneous process
Pre-Lab Assignment- Understanding Activity 3 in this manual and significant figures and uncertainty in measurements in general will help you answer the last two questions
Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced?
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