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4 years ago

12

if atom X has 6 protons,6 neutrons and 6 electrons and aton Z has 6 protons,7neutrons and 6 electrons,atom x and atom z are isot

opes of the element

1 answer:

MakcuM [25]4 years ago

3 0

The answer is 89! okay thank you

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What is the length of a one-dimensional box for an electron (9.109 x 10-31 kg) with an n=1 energy of 479 kJ/mol? Give the answer

OverLord2011 [107]

Answer : The length of a one-dimensional box for an electron is $2.819\times 10^{31}\AA$

Explanation :

The energy level of quantum particle in a one-dimensional box is given as:

$E_n=\frac{n^2h^2}{8mL^2}$

where,

$E_n$ = 479 kJ/mol = 479000 J/mol

n = energy level = 1

h = Planck's constant = $6.626\times 10^{-34}Js$

m = mass of electron = $9.109\times 10^{-31}kg$

L = length of a one-dimensional box = ?

Now put all the given values in the above formula, we get:

$479000J/mol=\frac{(1)^2\times (6.626\times 10^{-34}Js)^2}{8\times (9.109\times 10^{-31}kg)\times L^2}$

$L=2.819\times 10^{21}m$

conversion used : $1m=10^{10}\AA$

$L=2.819\times 10^{31}\AA$

Therefore, the length of a one-dimensional box for an electron is $2.819\times 10^{31}\AA$

3 0

3 years ago

GIVEN BRAINLIEST

Yuliya22 [10]

Answer:

Hello, Your answer is <em>B) Making observations</em>

<u><em>(Hope That Helps Your Answer)</em></u>

3 0

4 years ago

Read 2 more answers

HI HELP ONLY DO THE 2nd ONE!

Likurg_2 [28]

I would say they design and build things.

8 0

3 years ago

Read 2 more answers

Science is based primarily on peoples opinions and views of the subject matter.

kvv77 [185]

Answer:

False

Explanation:

Science is not based on primarily on peoples opinions and views of the subject matter whereas science is based on empirical observations and research for its validity.

<u>Science aims to find answers to human questions related to the natural world through their research observation and experiments. Scientists and researchers provide valid proof of human questions so that people can trust them.</u>

Science can change people's opinions regarding the natural world with valid proof and observational theories but science is not based on people's opinion.

Hence, the given statement is "false".

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3 years ago

Why do cars tires need more air in the winter then in the summer?

Anastaziya [24]

<span>D) Temperature is lower so the air inside the tires contracts

In cold, we all know temperature is lower, and we know, it reduces the movement of air, so it contracts

Hope this helps!</span>

5 0

3 years ago