sente The reaction between hydrochloric acid and sodium carbonate is given by the equation a. 2 HCI (ag) + Na2CO3 (aq) 2 NaCI (aq) + H2O (1) + C02 (g) If 25.00 mL of 0.05000 M sodium carbonate solution is neutralized by 32.45 mL of hydrochloric acid, determine the concentration of the hydrochloric acid. b. 0.4201 g of an unknown monoprotic acid was dissolved in 25.00 mL of water and titrated with 0.09995 M NaOH. It was found that 38.76 mL of NaOH was required to reach the equivalence point. Determine the molecular weight of this unknown acid. attempt the following questions from a "virtual chemistry laboratory". Using the Bohr model of the atom, calculate the wavelength, frequency, wavenumber, and energy per mole for photons for the transition n; = 6 to nf = 3 in hydrogen. Based on the Bohr model of the atom, calculate the ionization energy for a single electron in C5+ if the electron begins in the n = 2 level. Bar-code scanners at supermarkets emit orange-red laser light with a wavelength of 633 nm. If the energy output of these scanners is 1.0 mJ per second, how many photons are released if the scanner operates for 2.0 seconds? Determine the longest wavelength of radiation required to ionize a sample of potassium metal if the binding energy for the electron is 1760 kJ/mol. How many moles of photons are contained in a flash of 607 x 1012 Hz radiation that contains 20.21 kJ of energy?
sente The reaction between hydrochloric acid and sodium carbonate is given by the equation a. 2 HCI (ag) + Na2CO3 (aq) 2 NaCI (aq) + H2O (1) + C02 (g) If 25.00 mL of 0.05000 M sodium carbonate solution is neutralized by 32.45 mL of hydrochloric acid, determine the concentration of the hydrochloric acid. b. 0.4201 g of an unknown monoprotic acid was dissolved in 25.00 mL of water and titrated with 0.09995 M NaOH. It was found that 38.76 mL of NaOH was required to reach the equivalence point. Determine the molecular weight of this unknown acid. attempt the following questions from a "virtual chemistry laboratory". Using the Bohr model of the atom, calculate the wavelength, frequency, wavenumber, and energy per mole for photons for the transition n; = 6 to nf = 3 in hydrogen. Based on the Bohr model of the atom, calculate the ionization energy for a single electron in C5+ if the electron begins in the n = 2 level. Bar-code scanners at supermarkets emit orange-red laser light with a wavelength of 633 nm. If the energy output of these scanners is 1.0 mJ per second, how many photons are released if the scanner operates for 2.0 seconds? Determine the longest wavelength of radiation required to ionize a sample of potassium metal if the binding energy for the electron is 1760 kJ/mol. How many moles of photons are contained in a flash of 607 x 1012 Hz radiation that contains 20.21 kJ of energy?
Chemistry: Principles and Practice
3rd Edition
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Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
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Chapter14: Chemical Equilibrium
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im not too sure how to do 2b
Transcribed Image Text:sen
a.
The reaction between hydrochloric acid and sodium carbonate is given by the eguation
2 HCI (aq) + Na2CO3 (aq) 2 NaCI (aq) + H20 (1) + CO2 (g)
If 25.00 mL of 0.05000 M sodium carbonate solution is neutralized by 32.45 mL of hydrochloric
acid, determine the concentration of the hydrochloric acid.
b. 0.4201 g of an unknown monoprotic acid was dissolved in 25.00 mL of water and titrated with
0.09995 M NaOH. It was found that 38.76 mL of NaOH was required to reach the equivalence
point. Determine the molecular weight of this unknown acid.
Attempt the following questions from a "virtual chemistry laboratory".
a. Using the Bohr model of the atom, calculate the wavelength, frequency, wavenumber, and
energy per mole for photons for the transition n; = 6 to nf = 3 in hydrogen.
%3D
%D
b.
Based on the Bohr model of the atom, calculate the ionization energy for a single electron in C5+
if the electron begins in the n = 2 level.
%3D
C. Bar-code scanners at supermarkets emit orange-red laser light with a wavelength of 633 nm.
If the energy output of these scanners is 1.0 mJ per second, how many photons are released
if the scanner operates for 2.0 seconds?
d. Determine the longest wavelength of radiation required to ionize a sample of potassium metal
if the binding energy for the electron is 1760 kJ/mol.
How many moles of photons are contained in a flash of 607 x 1012 Hz radiation that contains
20.21 kJ of energy?
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