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3 years ago

For the quantum number lower case L = 2, how many possible values are there for the quantum number m subscript l? 2 3 5 6

Chemistry

1 answer:

goldenfox [79]3 years ago

8 0

If l = 2, then ml can be -2, -1, 0, 1, 2. There are 5 possible values.

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The reaction between nitrogen dioxide and carbon monoxide is NO2(g)+CO(g)→NO(g)+CO2(g)NO2(g)+CO(g)→NO(g)+CO2(g) The rate constan

galina1969 [7]

Answer:

$k_2=2.55\ {Ms}^{-1}$

Explanation:

Using the expression,

$\ln \dfrac{k_{1}}{k_{2}} =-\dfrac{E_{a}}{R} \left (\dfrac{1}{T_1}-\dfrac{1}{T_2} \right )$

Where,

$k_1\ is\ the\ rate\ constant\ at\ T_1$

$k_2\ is\ the\ rate\ constant\ at\ T_2$

$E_a$ is the activation energy

R is Gas constant having value = 8.314 J / K mol

$k_2=?$

$k_1=2.57\ {Ms}^{-1}$

$T_1=701\ K$

$T_2=525\ K$

$E_a=1.5\times 10^2\ kJ/mol$

So,

$\ln \:\frac{2.57}{k_2}\:=-\frac{1.5\times \:10^2}{8.314}\times \left(\frac{1}{701}-\frac{1}{525}\right)\:\:$

$k_2=\frac{2.57}{e^{\frac{352}{40796.798}}}=2.55\ {Ms}^{-1}$

7 0

3 years ago

Are the changes from a to b and from b to c physical or chemical changes?

Vitek1552 [10]

Answer:

They are physical changes.

Explanation:

This is because there in no chemical reaction taking place, just a physical change.

A physical change in a change in which the chemical structure of the substance does not change. Ice, water and steam are all the same on a molecular level, thus changing from ice to water or from water to steam are physical changes.

A chemical change is a change in which the chemical structure of the substance undergoes a change, since this does not happen going for A to B or B to C they are not chemical changes.

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3 years ago

What are the three states in which most matter occurs

Mrrafil [7]

Solid, liquid, and gas.

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3 years ago

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How many molecules are there in 0.25 moles of oxygen

givi [52]

Answer:

There are 1.505×1023 molecules in 0.25 moles of oxygen.