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Mademuasel [1]
3 years ago
7

The activation energy for a(n) _____ is quite large and usually takes extra energy from the environment, it is normally not a na

tural spontaneous process. combustion reaction endothermic reaction exothermic reaction catalyzed reaction
Chemistry
2 answers:
aev [14]3 years ago
5 0

Answer:

endothermic reaction

Explanation:

The activation energy of an endothermic reaction is high. Endothermic reactions need heat to start and do not begin spontaneously. Activation energy is the minimum energy required to convert reactants to products.  The lower the activation energy the easier it is too start a reaction and vice versa. Catalyst helps to lower the activation energy and thereby speed up a chemical reaction.

Ira Lisetskai [31]3 years ago
3 0

Answer:

The activation energy for an endothermic reaction is quite large and usually takes extra energy from the environment, it is normally not a natural spontaneous process.

Explanation:

  • Endothermic reactions require absorbing energy of the surrounding mainly in the form of heat.
  • Chemical energy needs energy input to break the bonds.
  • Examples of endothermic reactions: Photosynthesis , melting of ice , and evaporating liquid water.
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In 1930 the American physicist Ernest Lawrence designed the first cyclotron in Berkeley, California. In 1937 Lawrence bombarded
IrinaK [193]

Answer:

⁹⁶₄₂Mo + ²₁H ⇒ ⁹⁸₄₃Tc

Explanation:

During the bombardment of a molybdenum target with deuterium ions, an element not found in nature was produced.The name of the element formed in the process is technetium. It is an element with the symbol Tc, mass number of 98, and atomic number 43. The nuclear equation is shown below:

⁹⁶₄₂Mo + ²₁H ⇒ ⁹⁸₄₃Tc

Technetium is the lightest element whose isotopes are all radioactive in nature except the fully ionized state of isotope ⁹⁷Tc. It is silvery gray in color and can be found between manganese and rhenium in group seven of the periodic table.

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4 years ago
Which atom in the ground state has a stable valence electron configuration?
Alecsey [184]
(1) Ar is your answer. Argon is a noble gas, which is stable in its standard valence electron configuration because it already completed its valence shell following the octet rule.
3 0
3 years ago
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What does dinitogen mean in a name
Svet_ta [14]
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6 0
3 years ago
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44.90 g of reactants are placed in a beaker
sergiy2304 [10]

Answer:

D. -1882J

Explanation:

We can solve the energy released in a chemical reaction in an aqueous medium using the equation:

Q = -m*C*ΔT

<em>Where Q is energy (In J),</em>

<em>m is mass of water (45.00g)</em>

<em>C is specific heat of water (4.184J/g°C)</em>

<em>And ΔT is change in temperature (25.00°C - 15.00°C = 10.00°C)</em>

<em />

Replacing:

Q = -45.00*4.184J/g°C*10.00°C

Q = -1882J

Right answer is:

<h3>D. -1882J</h3>

<em />

7 0
3 years ago
Draw the product formed when the structure shown below undergoes solvolysis in ch3ch2oh with heat.
mars1129 [50]

structure is attached below

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3 years ago
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