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lyudmila [28]
4 years ago
13

Ultra violet radiation

Chemistry
1 answer:
11Alexandr11 [23.1K]4 years ago
4 0

Answer:

B) mutagens

Explanation:

Mutagens are substances that causes mutation. Mutation involves alteration of the genetic materials of an organism.

Substances such as ultra-violet radiation, x-rays, nitrous acid, viruses, fungal-infections e.t.c leads to the physical, chemical and biological alteration of genetic sequences to produce a mutant. A mutant is an organism whose genetic sequence has been altered.

Note: Pathogens are disease causing organisms. Vectors are carriers of pathogens.

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Plz help me!!!!plzzz!
yulyashka [42]

Answer:

A

Explanation:

Since the new moon is behind the earth, It is sun, earth, moon

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3 years ago
How many neutrons does an element have whose electronic formula is 1s²2s²2p⁵​
Flura [38]

Answer:

it have 10 neutrons and it is Fluorine(F).

4 0
3 years ago
Using the bond energy data from your text (or the internet), determine (show calculations for) the approximate enthalpy change ,
aleksley [76]

Answer:

∆H=  <u>438 KJ/mol</u>

Explanation:

First, we have to find the <u>energy bond values</u> for each compound:

-) Cl-Cl = 243 KJ/mol

-) F-F = 159 KJ/mol

-) F-Cl = 193 KJ/mol

If we check the reaction we can calculate the <u>number of bonds</u>:

Cl_2_(_g_)~+~3F_2_(_g_)~->~2ClF_3_(_g_)

In total we will have:

-) Cl-Cl = 1

-) F-F = 3

-) F-Cl = 6

With this in mind. we can calculate the <u>total energy for each bond</u>:

-) Cl-Cl = (1*243 KJ/mol) = 243 KJ/mol

-) F-F = (3*159 KJ/mol) = 477 KJ/mol

-) F-Cl = (6*193 KJ/mol) = 1158 KJ/mol

Now, we can calculate the total energy of the <u>products</u> and the <u>reagents</u>:

Reagents = 243 KJ/mol + 477 KJ/mol = 720 KJ/mol

Products = 1158 KJ/mol

Finally, to calculate the total enthalpy change we have to do a <u>subtraction</u> between products and reagents:

∆H= 1158 KJ/mol-720 KJ/mol = <u>438 KJ/mol</u>

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I hope it helps!

7 0
3 years ago
How many atomic orbitals of each type mix to form hybrid orbitals of the central atom in cl2o?
lidiya [134]

In here Oxygen is the central atom. It makes two bonds with Cl and has two lone pairs. Since, the shape is bent and the hybridization is sp3. Molecular geometry is a bit dissimilar from hybridization. Hybridization is reliant on the number of bonds and lone pairs. Since O has two bonds with Cl, its hybridization is sp3. It is like is this: 1 lone pair/bond = s. 2 lone pairs/bond = sp 3 lone pairs/bonds = sp2, etc. molecular geometry, you count the number of bonds and lone pairs. This has two bonds and 2 lone pairs so if they were all bonds, the molecule would be tetrahedral. 

4 0
4 years ago
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Acid is B.  ph is A. base is D. ions is C. 

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