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3 years ago

The kind of energy released when atoms are rearranged to form new bond

Chemistry

1 answer:

Murljashka [212]3 years ago

6 0

The kind of energy released when atoms are rearranged to form new bonds is called Chemical energy.

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calculate the atomic mass of element X, if it has 2 naturally occurring isotopes with the following masses and natural abundance

jeka57 [31]

Hey there!

To find this, you should:

1) multiply the percentage (but in a decimal form) of each isotope by the mass.
2) add all your masses together
3) make sure to check for significant figures and you’re done!

Hope this helps :)

4 0

3 years ago

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

Is a raccoon a carnivore

algol [13]

A raccoon is an omnivore

4 0

4 years ago

A carbohydrate sample weighing .235 g was found to have a fuel value of 3.8 4 KJ what is the fuel value of 1 g of this carbohydr

coldgirl [10]

Answer:

The fuel value of 1 gram of this carbohydrate in a nutritional calorie is 4.0 kcal/G.

8 0

3 years ago

A certain atom contains 53 protons, 66 neutrons, and 51 electrons. What is the mass number of this atom?

xeze [42]

Answer:

The mass number of an element is the sum of protons and neutrons.

Hence, 53+66 =119

The mass number of the atom is 119.

3 0

3 years ago