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Crystals are characterized by particular patterns that repeat in how many dimensions?
The solid iodine quickly changes from a solid to gas while the solid sodiumchloride needs alot of energy to change into the liquid state. why is this so?
Which the following is exothermic process and why?
1: Be + e- ----> Be^-
2: Li + e- -----> Li^-
3: Na -----> Na^+ + e-
4: N + e- -----> N + e -
Here all atoms are gaseous atoms
1: Be + e- ----> Be^-
2: Li + e- -----> Li^-
3: Na -----> Na^+ + e-
4: N + e- -----> N + e -
Here all atoms are gaseous atoms
Why at the quality control of nitrogen we need an alkaline environment?
The rate constant for the equation
2 C2F4 → C4F8
is 0.0469 M−1
· s
−1
. We start with 0.203 mol
C2F4 in a 2.00-liter container, with no C4F8
initially present. What will be the concentra-
tion of C2F4 after 1.00 hour ?
2 C2F4 → C4F8
is 0.0469 M−1
· s
−1
. We start with 0.203 mol
C2F4 in a 2.00-liter container, with no C4F8
initially present. What will be the concentra-
tion of C2F4 after 1.00 hour ?
If 1.8 moles of NO2 are initially present in a
sealed 1.00 liter vessel at 25◦ C, what is the
half-life (in years) of the reaction?
sealed 1.00 liter vessel at 25◦ C, what is the
half-life (in years) of the reaction?
Hydrogen Bromide is formed by a reaction between hydrogen gas and bromine vapor.
Here is the equation, H2(g) + Br2(g) <==> 2HBr(g), with K(eq) = 3.5
Calculate the equilibrium concentration of all gases if 0.40 mol of H2(g) and 0.60 mol of Br2(g) are placed in a 4.0L container.
Here is the equation, H2(g) + Br2(g) <==> 2HBr(g), with K(eq) = 3.5
Calculate the equilibrium concentration of all gases if 0.40 mol of H2(g) and 0.60 mol of Br2(g) are placed in a 4.0L container.
Nitrosyl Chloride, NOCl(g) decomposes to form nitrogen monoxide gas and chloride gas according to the following equation.
2NOCl(g) double arrow 2NO(g) + Cl2(g)
At a certain temperature, the equilibrium constant is 1.60 x 10-6 (that's supposed to be an exponent). Calculate the equilibrium concentrations of all gases if 0.800 moles of NOCL(g) are placed in a 2.00 L container.
2NOCl(g) double arrow 2NO(g) + Cl2(g)
At a certain temperature, the equilibrium constant is 1.60 x 10-6 (that's supposed to be an exponent). Calculate the equilibrium concentrations of all gases if 0.800 moles of NOCL(g) are placed in a 2.00 L container.
Use the concentration and rate data presented in the table below to answer the following questions about the hypothetical reaction:
A + 2B + 4C arrow 2D + E
Line [A] [B] [C] Rate (mol/L∙s)
1 0.100 0.100 0.100 3.6 x 10^-2
2 0.200 0.100 0.100 3.6 x 10^-2
3 0.100 0.200 0.100 7.2 x 10^-2
4 0.200 0.200 0.200 2.9 x 10^-1
5 0.300 0.200 0.300 ?
a) Why would you expect this reaction to be a multi-step reaction, based on the overall reaction?
b) What is the order of the reaction, with respect to each reactant?
c) What is the overall order of the reaction?
d) Write the rate law equation?
e) How does the rate law equation confirm that this is a multi-step reaction?
f) Predict the rate indicated by the "?"
g) Propose a reaction mechanism with the third step as the rate-determining step.
h) Draw a potential energy diagram to illustrate this reaction mechanism, assuming that the overall reaction is endothermic. Label reaction intermediates with "RI", and activated complexes with "AC".
A + 2B + 4C arrow 2D + E
Line [A] [B] [C] Rate (mol/L∙s)
1 0.100 0.100 0.100 3.6 x 10^-2
2 0.200 0.100 0.100 3.6 x 10^-2
3 0.100 0.200 0.100 7.2 x 10^-2
4 0.200 0.200 0.200 2.9 x 10^-1
5 0.300 0.200 0.300 ?
a) Why would you expect this reaction to be a multi-step reaction, based on the overall reaction?
b) What is the order of the reaction, with respect to each reactant?
c) What is the overall order of the reaction?
d) Write the rate law equation?
e) How does the rate law equation confirm that this is a multi-step reaction?
f) Predict the rate indicated by the "?"
g) Propose a reaction mechanism with the third step as the rate-determining step.
h) Draw a potential energy diagram to illustrate this reaction mechanism, assuming that the overall reaction is endothermic. Label reaction intermediates with "RI", and activated complexes with "AC".
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#340153 on Dec 2023
#340153 on Dec 2023