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Gre4nikov [31]
3 years ago
10

This version of Einstein's equation can be used directly to find what value? `Δm = E/c^2

Chemistry
2 answers:
Oksana_A [137]3 years ago
7 0

Explanation:

In the given version of an Einstein's equation:

\Delta m = \frac{E}{c^2}

\Delta m = Mass defect

E = Nuclear binding energy of an atom which holds the nucleus of an atom together.

c = speed of the light =3\times 10^8 m/s

From the given version one can determine the mass defect which is a binding force of a nucleus in an atom if nuclear binding energy is known.

Marina86 [1]3 years ago
4 0

<u>Answer</u>

mass


<u>Explanation</u>

E=mc² explains nuclear fusion, how matter can be destroyed and converted to energy and energy can be converted back to mass.

It explains the atomic energy produced by nuclear power plants and the atomic energy released by atomic bombs.

E=mc²

m = E/c²

From the version in the question the value to be found directly is mass.

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Which group of elements has the most similar chemical properties? (1 point)
enot [183]

Answer:

carbon nitrogen and oxygen

6 0
3 years ago
What is 3623÷72×2(59)1(4)&lt;8335×(3)(2x)
sineoko [7]

Answer:193

Explanation:

7 0
3 years ago
Match the following associations. Exothermic or endothermic
Alekssandra [29.7K]

<u>Answer:</u>

<em>1) ∆H is positive \Rightarrow Endothermic </em>

<em>2) E_p>E_r \Rightarrow Endothermic  </em>

<em>3) Energy is absorbed \Rightarrow Endothermic </em>

<em>4) E_r>E_p \Rightarrow Exothermic </em>

<em>5) ∆H is negtive \Rightarrow Exothermic </em>

<em></em>

<u>Explanation:</u>

∆H is called as enthalpy change  

It is also called as Heat of reaction

Energy is required for the bond to break a bond.

Energy is released when a bond is formed.

H_2+Cl_2>2HCl

that is

H-H+Cl-Cl>2H-Cl

We see in this equation, bonds between hydrogen and chlorine molecules gets broken and on the right side bond is formed in HCl.

If energy of products greater than energy of reactants then the reaction enthalpy change is endothermic .

If energy of products lesser than energy of reactants then the reaction enthalpy change is exothermic .

For example  

\Delta H=E_p-E_r

=30KJ-20KJ

=+10KJ

(positive hence endothermic)

\Delta H=E_p-E_r

=10KJ-40KJ

=-30KJ

(negative hence exothermic)

8 0
3 years ago
Which of the following is an example of electrical energy being converted to chemical energy?
marishachu [46]

The correct answer is option D, that is, a storage battery is charged using an electric current.  

The transformation of one form of energy into another, generally to transform the energy into more useful kind is known as energy conversion. The energy can neither be created nor be destroyed, it can only be transformed. The different forms of energy comprise light, heat, mechanical, electrical, sound, nuclear, and sound.  

In the given question, the charging of a storage battery using electric current is an example of electrical energy being converted into chemical energy.  


5 0
3 years ago
Read 2 more answers
A sample of pure NH4HS is placed in a sealed 2.0-L container and heated to 550 K at which the equilibrium constant is 3.5 x 10-3
Zolol [24]

Answer:

The mass of NH_{3} in the container is 2.074 gram

Explanation:

Given:

Volume of NH_{4} HS    V = 2 lit

Equilibrium constant k _{eq} = 3.5 \times 10^{-3}

The reaction in which NH_{3} is produced

  NH_{4} HS ⇄ NH_{3} + H_{2}S

Here equal moles of NH_{3} and H_{2}S is formed.

From the formula of equilibrium constant,

  k_{eq} = (NH_{3})(H_{2}S )

   x^{2} = 3.5 \times 10^{-3}

     x = 0.061 M

Above value shows,

   NH_{3} = 0.061 \frac{moles}{L}

So in 2 L no. moles of NH_{3} = 0.061 \times 2 = 0.122 moles.

So mass of 0.122 mole of NH_{3} is = 0.122 \times 17 = 2.074 g

Therefore, the mass of NH_{3} in the container is 2.074 gram

8 0
3 years ago
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