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In conducting a titration of 75.00mL of a certain triprotic acid with 0.0800 M NaOH the following information was recorded. a. the first equivalence point was observed at pH 3.96 after the addition of 12.4 mL of NaOH b. the Second equivalence point was observed after the addiditon of 25.00 mL of NaOH; the pH was measured to be 4.98 Determine the apparent concentration of the triprotic acid and the dissociation constant for the first two dissociation steps given that pKa3= 5.19
Using oxidation and reduction half-reactions, balance the skeletal equation: N_2H_4(g) + ClO_3 -(aq) --> NO(g) + Cl-(aq) of hydrazine with chlorate ions.
After emptying the water and drying the flask, it was filled with ethylene glycol. it now weighed 338.72 grams. what is the specific gravity of the ethylene glycol?
The reading on a mercury manometer at 25 deg C (open to the atmosphere at one end) is 56.38 cm. The local acceleration of gravity is 9.832 m s-2.
Consider a perfect gas with Cvm = 28.0 J/mol-K trapped in a piston/cylinder arrangement with cross-section area of 250.0 cm^2. The gas expands irreversibly against a fixed external pressure of 1.0 atm adiabatically
How much energy (in calories) is needed to heat 12cm^3 of fat from room temperature (25C ) to its melting point (35C)? Specific heat of fat 0.45 cal/(g*C, and the density of fat is .94g/cm^3)
If a 10.00mL sample of unknown concentration of HF is titrated with 28.94mL of 0.1040M NaOH, what is the concentration of HF
If wave (a) has a wavelength of 1.0 m and a frequency of 3.0*10^8 cycles, what are the wavelength of wave
Calculate the value of the equilibrium constant at 298 K for the reaction: Sn(s) + Sn4+(aq) 2 Sn2+(aq).
What is the single-particle collisional frequency (for diatomic Nitrogen)at sea level, with 341 and 1.0 atm. The corresponding single-particle collisional frequency is reported as 10^10 s^-1.
A nugget of pure gold of 4.90 grams absorbed heat of 270 Joules. determine the final temperature of the Au if the initial temperature = 22.0°C? specific heat of Au =0.129 J/(g·°C).
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the temperature and pressure were 20.0 °C and 758 mmHg, respectively.
How many grams of oxygen are collected in a reaction where 235 mL of oxygen gas is collected over water at a temperature of 25 ^circ {rm C} and a total pressure of 704 torr?
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