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50.00 mL of 0.200 mol/L sodium hydroxide, NaOH(aq), is required to titrate 20.00 mL of a nitric acid solution, HNO3 (aq), to the endpoint. What is the amount concentration of the nitric acid solution? Show your work and explain each step.
if a sample of 2.63 L of neon is collected at 730 torr and 26 degrees C, what volume will the gas occupy at 1.10 atm and 10 degrees C?
Melting point alone cannot be used to unambiguously identify an unknown substance. Why not? What else do you need to confirm the identity of an unknown sample by melting point?
If equal volumes of 0.15 NaOH and 0.10 NaH2PO4 are mixed what type of system is formed? A) Buffer Ka2 B) amphiprotic C) Buffer Ka3 D) strong base
What is the value of Kc for the reaction at the temperature of the reaction Mixture. N2(g)+O2(g) 2 NO(g)
Calculate the pH of a 1.39x10^-2 M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86
In a washing machine, water is extracted from clothes by a rapidly spinning drum (Fig. 3.25). Explain the physics behind this process.
a student collects 31.8 mL of argon gas at a temperature of 21 Celsius and a pressure of 755 mmHg. What is the volume of argon at STP?
What properties are necessary and desirable for a solvent in order that it is well suited for recrystallizing a particular organic compound?
What are the virulence factors of Clostridium difficile and Helicobacter pylori? Also, what are the symptoms, and how are they treated?
an office heater puts out 2070 btus british thermal units of energy in the form of heat per hour. given that 1 btu
Which of the following statements is/are correct. i. KBr, HClO3, and HClO2 are strong acids ii. NaH, KOH, and Li2O are strong bases iii. HI, HClO3, and HNO3 are strong acids
Equal volumes of 1 x 10-5 M solutions of Cd2+ and CO32- ions are mixed in one flask and equal volumes of 1 x 10-5 M solutions of Ag+ and CrO42- ions are mixed in a second. Which substances precipitate given that the Ksp values of CdCO3 and Ag2CrO4..
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