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Sulfamic acid, HSO3NH2, and sodium nitrite, NaNO2, should not be brought together as solids for safety reasons, why is water added to the vial containing your unknown sample as well as to the Erlenmeyer flask containing sulfamic acid? 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
The oxidation of nitrogen monoxide gas by molecular oxygen to form nitrogen dioxide gas is reversible and exothermic. Predict the effect of each of the following changes on the position of the equilibrium and a relative change in Kc.
The bottle is then brought outside and stored at 0.0°C. (a) What mass of liquid water condenses inside the bottle?
The concentrations of ozone in Los Angeles has been measured at 441 ppb. Los Angeles sits at an altitude of 7400 ft where the atmospheric pressure is only 0.67 atm. Calculate the partial pressure (in atm) of ozone at 441 ppb if the atmospheric pre..
Determine the number of significant digits in each number and write out the specific significant digits.
What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?
The PF5 molecule is known to have a trigonal bipyramidal shape. Explanation of its bonding includes all of the following EXCEPT: A. Bond Angles of 90 degrees
What is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants?
Identify the spectator ions present when the following are mixed. Include aggregation states. If there are no spectator ions, say none.
The dependance of the equilibrium constant of a reaction on temperature is given by the van't Hoff equation: lnK = -change of H/(RT) + C where C is a constant
Then 40.0 mL of this solution were titrated with 0.060 M HClO4. Calculate the pH at the first equivalence point.
What weight of malononitrile would be recovered by extraction with (a) three 100-mL portions of ether; (b) one 300-mL portion of ether.
calculate the concentration (molarity) of AgCl in a saturated solution.
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