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blsea [12.9K]
3 years ago
5

g cr2o3 molar mass compound containing chromium and silicon contains 73.52 mass percent chromium. Determine its empirical formul

a.
Chemistry
1 answer:
gavmur [86]3 years ago
4 0
Ggggggggggggggggggggg
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Balance the following equation. Choose "blank" if no coefficient other than 1 is needed.
Ann [662]

Explanation:

Pb+2 AgNO3=Pb(NO3)2+2Ag

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Is 4atm to big of a difference to get when I use the ideal gas law vs the van der waals equation?
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This absolute amount of pressure does not play a significant difference.

At high temperatures and low pressures, its results deviate too little.

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Using the Bohr model, determine the lowest possible energy, in joules, for the electron in the Li2+ ion.
lyudmila [28]

Answer: E = - 19.611×10^{-18} J

Explanation: The lowest possible energy can be calculated using the formula:

E_{n} = - Z^{2}.\frac{k}{n^{2}}

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k is a constant which contains other constants and is 2.179×10^{-18} J

n is a layer;

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Substituing:

E_{1} = - 3^{2}.\frac{2.179.10^{-18}}{1}

E_{1} = -19.611.10^{-18} J

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3 years ago
Why do transitioning electrons release or absorb energy?
Tom [10]

Answer:

when an electron jumped into higher energy level  from lower energy level it must absorbed the energy because with small amount of energy it can not jumped into higher energy level.

when it came back to lower energy level it release extra energy.

Explanation:

The electron is jumped into higher level and back into lower level by absorbing and releasing the energy.

The process is called excitation and de-excitation.

Excitation:

When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits.  For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy because electron can not stay longer in higher energy level and comes to ground state.

De-excitation:

When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum .

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4 years ago
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Please help <br><br>A. identify the structure drawn below
Pepsi [2]

Answer i do not know

Explanation:

becaus

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