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Calculate the pH of a formic acid solution that contains 1.39% formic acid by mass. (Assume a density of 1.01 for the solution.)
Select the most appropriate explanation of the following observation on solubility: "Hydrogen chloride, HCl, is very soluble in water." Water is a polar solvent, and it promotes the ionization of many polar molecules.
what is the maximum wavelength of light that can be used to observe the photoelectric effect? answer in nm.
An experiment requires 42.0 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.
A sample of helium has a volume of 3 liters when the pressure is 500 torr. What volume does the gas occupy at 300 torr?
Consider one mole of a monatomic ideal gas at 300 K that undergoes a free expansion from a volume of 1 m^3 to 10 m^3. a) How much does the chemical potential of each molecule in a gas change?
A gas expands and does P-V work on the surroundings equal to 281 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
If the solution is 40.0% K2CO3 by mass, what is the predicted freezing point of this solution in °C, assuming full ionization.
If a 0.100 molar solution of NaOH is added to a solution containing 0.200 molar Ni2+, 0.200 molar Ce3+, and 0.200 molar Cu2+, which metal hydroxide will precipitate first?
Assuming the solution has a heat capacity of 4.18 J/°Cg and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol."
How many grams of FeSO4.(NH4)2SO4.6H2O (MW = 392.14) must be dissolved and diluted to 250.0 mL to prepare an aqueous solution that is 10.00 ppm Fe2+
What is the phenomenon that occurs when excited gaseous elements emit only a few colored lines? a. Planck's constant
How much energy (in calories) is needed to heat 17cm^3 of fat from room temperature (25 C) to its melting point (35 C)?
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