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3 years ago

Which of the following represents the ground state electron configuration for the Mn3 ion?

Chemistry

1 answer:

Allisa [31]3 years ago

7 0

Answer:

$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2$

Explanation:

The $Mn^{+3}$ has 22 electrons arround the nucleous. Its ground state configuration following the diagonal rule is:

$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^2$

In term of the previous noble gas:

$[Ar] 4s^2 3d^2$

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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

The stockroom has provided you with a 1.70 MM stock solution of NaCl NaCl. What volume of this stock solution would be required

bearhunter [10]

Answer: The volume of stock NaCl solution needed is 23 mL

Explanation:

To calculate the molarity of the diluted solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the stock NaCl solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted NaCl solution

We are given:

$M_1=1.70M\\V_1=?mL\\M_2=0.170M\\V_2=230mL$

Putting values in above equation, we get:

$1.70\times V_1=0.170\times 230\\\\V_1=\frac{0.170\times 230}{1.70}=23mL$

Hence, the volume of stock NaCl solution needed is 23 mL

6 0

3 years ago

If heat transfers from the system (solute) to the surroundings (solvent), then AH is

balu736 [363]

Answer:

B) exothermic.

Explanation:

Hello!

In this case, we need to keep in mind that exothermic reactions release heat, so they increase the temperature as the final energy is less than the initial energy; in contrast, endothermic reactions absorb heat, so they decrease the temperature as the final energy is greater than the initial energy.

In such a way, when a dissolution process shows off a negative enthalpy of dissolution, we infer it is an exothermic process due to the aforementioned; therefore, the answer is:

B) exothermic .

Best regards!

3 0

3 years ago

SOME ONE PLEASE HELP ME I NEED THIS SO BAD 30 POINTS AND WIL MARK BRAINLIST!!!

Phantasy [73]

Answer:

Ape x Predator - C)

Tetiary Consumers - A)

Secondary Consumers - E)

Primary Consumers - B)

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Explanation:

4 0

2 years ago

Read 2 more answers

If an atom of zinc has a mass of 64 it has how many neutrons

sveta [45]

Answer:

no of neutron = atomic mass - atomic number

Explanation:

here
atomic mass = 64
atomic number = 30

no of neutron = 64−30

no of neutron = 34

3 0

3 years ago