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Upon reaction with excess sulfamic acid, HSO3NH2, a 0.121g sample of a mixture of sodium nitrite, NaNO2, and sodium chloride, NaCl, produced 28.3 mL of nitrogen gas collected over water at 25.3 degrees Celsius and at a barometric pressure of 738 mmHg. Determine the percent by mass of NaNO2 in the original sample
Consider the acid-catalyzed cleavage of propylene oxide with 1-propanol. Provide abbreviated structural formulas for the protonated epoxide substrate and of 1-propanol
What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836 mm Hg at 25.0 C in a 2.00 L flask?
The observed temperature increase is 2.64 °C. If the heat capacity of the calorimeter is 32.30 kJ·K^-1, how many nutritional Calories are there per gram of the candy
What is the osmotic pressure of a solution that contains 4.26 ×10-3 moles of lactose in 111 mL of solution at 29C?
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) Kc=53.3 At this temperature, 0.800 mol of H2 and 0.800 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present ..
The excess reagent required 4.30mL back-titration with .00812M Cu2+. Calculate the average weight of Cr on each square centimeter of surface.
What is the maximum number of electrons that can be in a second electron shell (principal energy level)?
what is the vapor pressure at 40 degrees Celcius of a solution containing 4.60*10^2 g of glycerin, C3H8O3, nonvolatile, nonelectrolyte solute, in 4.5*10^2 g of water? The vapor pressure of water at 40 degrees Celcius is 55.3 mmHg
The standard free energy of activation of a reaction A is 88.3 kJ mol-1 (21.1 kcal mol-1) at 298 K. Reaction B is one hundred million times faster than reaction A at the same temperature.
Find the value of Ka, for the conjugate acid of the following bases: a) methylamine, a solvent analogous to ammonia with a strong fish odor; Kb=5.0x10-4 b) morphine, an extremely powerful opiate;Kb= 1.6x10-6
Determine the concentrations of Ag+ and C2O4- in a saturated aqueous solution of Ag2C2O4. Ksp = 3.5 x 10-11
What mass of oxygen would be required to convert the same sample of nitrogen to nitrogen dioxide (NO2) instead?
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