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A 25.00-mL aliquot of a nitric acid solution of unknown concentration is pipetted into a 125-mL Erlenmeyer flask and 2 drops of phenophthalein are added. The above sodium hydroxide solution (the titrant) is used to titrate the nitric acid solution (the analyte). If 16.77 mL of the titrant is dispensed from a buret in causing a color change of the phenolphthalein, what is the molar concentration of the nitric acid (a monoprotic acid) solution? Express the molar concentration of HNO3 to the correct number of significant figures.
The carbon-11 nuclide radioactively decays by positron emission. Write a balanced nuclear chemical equation that describes this process.
What is the total sample size (in grams) for a sample of magensium nitrite which contains 0.96 g of oxygen
Sodium atoms emit light with a wavelength of 330 nm when an electron moves from a 4 p orbital to a 3 s orbital. What is the energy difference between the orbitals in kilojoules per mole?
If the formula for magnesium fluoride is MgF 2 and the formula for potassium chlorate is KClO 3 , then what is the formula for magnesium chlorate?
A solid hydrate weighing 2.691g was heated to drive off the water. A solid anhydrous residue remained, which weighed 2.259g. If the anhydrous residue has a formula weight of 282, How much moles of water are present in one mole of anhydrous salts
When 20 mL of a 120 mL stock solution containing 2 M BaF2 is diluted to 80 mL, what is the concentration of F- in the new solution.
the pressure is found to be 1atm. 3 g of gaseous substance B are then added to the 2g of A, and the pressure is now found to be 1.5 atm. Assuming ideal gas behavior. calculating the ratio of molecular weights, that is MwA/ MwB
A reaction mixture in a 5.21 L flask at a certain temperature contains 27.1g CO and 2.32g H2. At equilibrium, the flask contains 8.63g CH3OH
assuming the temperature is constant predict whether the change in entropy delta s is positive negative or zero during
what is the molar concentrations for those two. The solution volumes are additive. Thank you so much I can't figure this out and I've been looking at it for 2 hours. I need it for my lab report.
Calculate the heat capacity of satan, i. e. Ni . if 30.0g of nickel at 100.0 c raises the temperature of 25.0g of water from 22.0 c to 30.8 c . assume no heat loss to the surroundings.
Use Coulomb's law to calculate the ionization energy in kJ/mol of an atom composed of a proton and an electron separated by 272.00 pm.
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