Extra Credit 48

Last updated
Save as PDF

Page ID: 49209

\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

Q2.82

A mixture of H₂ and He effuses through an orifice at a certain temperature. Calculate the composition (in mole fraction) of the gas that passes through the orifice.

Solution: 0.4143

Q2.60

Plot the speed distribution function for:

a) H₂, He and PCl₃

b) O₂ at 400 K and 1000 K

Solution:

Q9.3

What are the units of the rate constant for second order reaction?

Solution: \(m^{-1} s^{-1}\)

Q9.19

Can the order of a reaction be determined if a mechanism is given? What if the reaction was an elementary reaction?

Solution: yes and yes

Q10.11

The initial rates at various substrate concentrations for an emzyme-catalyzed reaction as follows:

[S] (M)	v₀/ 10^-6 (M min^-1)
3.5 x 10^-5	40.0
5.00 x 10^-5	60.3
7.00 x 10^-5	70.5
14.0 x 10^-5	100.0
22.0 x 10^-5	118.0

Does this reaction follow Michaelis- Menten kinetics?
Calculate the value of V_Max of the reaction.
Calculate the value of K_M value of the reaction.
Calculate the initial rates at [S] = 6.00 x 10^-5 M and [S] = 4.00 x 10^-2 M.
What is the total amount of product formed during the first 5 min at [S] = 5.5 x 10^-5 M.
How would a decrease in the enzyme concentration by a factor of 2 affect each of the following quantities: K_M, V_max, and v₀ ([S] = 6.00 x 10^-5 M)

Solution:

yes
Cannot. Need \(K_m\) value
not enough information to find \(K_m\)
not enough information
not enough information
not enough information

Q11.9

A proton is accelerated through a potential difference of 5.0 x 10⁶eV, starting from the rest. Calculate its final wavelength.

Solution: \(2.5\times{10}^{-13}\)

Q11.33

Q13.4

If you lived in New York, which of the following natural gases would you keep in an indoor storage tank in winter: Ethylene (C₂H₄), 2-Methylpentane (C₆H₁₄) and propane (C₃H₈).

Solution: C₂H₄

Q 14.7

Magnesium b- lines is at 518 nm and 517 nm. Calculate the difference in energy (in J) between these 2 lines.

Solution: \(6.626\times{10}^{-43}\)

Q14.30

Explain how anion and cation of aromatic hydrocarbon got their color?

Solution: the photon that is absorbed and emitted is within the visible spectrum, allowing us to see color.