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3 years ago

What sublevels are filling across the transition elements

Chemistry

1 answer:

Nana76 [90]3 years ago

8 0

Answer: filling the d orbitals.

Explanation:

This is why they are know as d block elements. Their electrons are filling the d block orbitals.

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A hot air balloon, when fully inflated, contains 2,800,000 Liter of air. If each mole of air occupies 22.4 L of at a temperature

emmainna [20.7K]

Answer:

1.44 atm

Explanation:

Step 1:

We'll begin by calculating the number of mole in 2,800,000 Liter of air.

I mole of air occupy 22.4L.

Therefore, Xmol of air will occupy 2800000L i.e

Xmol of air = 2800000/22.4

Xmol of air = 125000 moles

Step 2:

Determination of the pressure when the balloon is fully inflated .

This can be obtained as follow:

Number of mole (n) of air = 125000 moles

Volume (V) = 2800000 L

Temperature (T) = 120°C = 120°C + 273 = 393K

Gas constant (R) = 0.082atm.L/Kmol

Pressure (P) =.?

PV = nRT

Divide both side V

P= nRT/V

P= (125000x0.082x393) / 2800000

P = 1.44 atm

Therefore, the pressure of the air when the balloon is fully inflated is 1.44 atm

3 0

3 years ago

476 nm = [? ]10<br>cm<br>give your answer in scientific notation.

KatRina [158]

1nm=10^-6 cm.

476 nm = 4.76E-5 cm

6 0

3 years ago

How many inches is in 10 cm? Use dimensional analysis to show your work.

jeka57 [31]

Answer:

about 3.937

Explanation:

There are exactly 2.54 cm in an inch so we have

10cm/1 * 1inch/2.54cm = 10inch/2.54 = 3.937

4 0

3 years ago

A photon with 2.3 eV of energy can eject an electron from potassium. What is the corresponding wavelength of this type of light?

Ira Lisetskai [31]

Answer:

$\lambda=540.16\ nm$

Explanation:

Given that:

The energy of the photon = 2.3 eV

Energy in eV can be converted to energy in J as:

1 eV = 1.60 × 10⁻¹⁹ J

So, Energy = $2.3\times 1.60\times 10^{-19}\ J=3.68\times 10^{-19}\ J$

Considering

$Energy=\frac {h\times c}{\lambda}$

Where,

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

$\lambda$ is the wavelength of the light being bombarded

Thus,

$3.68\times 10^{-19}=\frac {6.626\times 10^{-34}\times 3\times 10^8}{\lambda}$

$\frac{3.68}{10^{19}}=\frac{19.878}{10^{26}\lambda}$

$3.68\times \:10^{26}\lambda=1.9878\times 10^{20}$

$\lambda=5.40163\times 10^{-7}\ m=540.16\times 10^{-9}\ m$

Also,

1 m = 10⁻⁹ nm

So,

$\lambda=540.16\ nm$

3 0

4 years ago

What is 4/5-1/2-1/5

zimovet [89]

Answer:

$\frac{1}{10}$

Explanation:

First write all numerators above the common denominator

4/5 - 1/2 - 1/2=

$\frac{4-1}{5}$ - 1/2

Subtract the numbers

$\frac{4-1}{5}$ - 1/2 =

$\frac{3}{5}$ - $\frac{1}{2}$

Write all numerators above the least common denominator 10

$\frac{3}{5}$ - $\frac{1}{2}$ =

$\frac{6-5}{10}$

Subtract the numbers and you got your answer :)

8 0

3 years ago

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