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3 years ago

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Calculate the wavelength in Angstrom of the photon that emitted when an electron in the Bohr orbit n=2 returns to the orbit n=1

in the H atom. The ionization Potential of the ground state of H atom is (-2.17 X 10^-11) energy/ atom.

1 answer:

nikdorinn [45]3 years ago

7 0

IDK THE ANSWER BUT I THINK I NEED HELP ON THIS ONE TO

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Three separate 3.5g blocks of al, cu, and fe at 25°c each absorb 0.505 kj of heat. which block reaches the highest temperature?

77julia77 [94]

The energy can be shown as:

Q = ms dT

Whereas, m is the mass of block

s is specific heat

dT is change in temperature.

Copper block having the lowest specific heat and thus having the higher change in temperature and therefore having the higher final temperature.

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3 years ago

What is the electronic configuration of Au3+?

Anettt [7]

Answer:

$AU^{3+} : [Rn] 5f^3$

Explanation:

Writing electronic configuration of any element you should know atomic number of that element ,

and also electrons are filling according to their energy level and first electron is filled in the lower energy orbital

and it follows n+1 rule if n+1 is same for two orbital electron will go first in the lowest value of n.

writing electronic configuration of ion can be done like first for their neutral atom and then add or remove electron it will make things easy because there are also some eception case their you may do wrong.

$AU : [Rn] 5f^3 6d^1 7s^2$

remove three electron from outer most shell of AU

$AU^{3+} : [Rn] 5f^3$

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3 years ago

Compound name for C3F8

Naya [18.7K]

Answer:

Perflutren

Explanation:

Perflutren is a fluorinated hydrocarbon and gaseous substance used as an imaging contrast agent.

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3 years ago

In a food chain, energy does NOT flow directly from - F producer to decomposer G producer to consumer H consumer to decomposer J

IgorLugansk [536]

Answer:

producer to decomposer

Explanation:

This is because in a food chain , energy flow from one trophic level to another. The producer which include plants are the source of energy which they manufacture good in the presence of light energy from sun. Energy flow directly from the producer to the primary consumer which are heterotrophs that feed on plants. Energy flow from consumer to decomposer after the consumer died and it is decayed.

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3 years ago

What is the name of the covalent compound ccl4?

sleet_krkn [62]

The name of the covalent compound CCl4 is 'Carbon tetrachloride'.

Hope this helps!

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4 years ago