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never [62]
2 years ago
8

What is one of the BEST practices officers should use when securing a crime scene?

Chemistry
1 answer:
notsponge [240]2 years ago
7 0

Answer:

The best practices officers should use when securing a crime scene is option D

D. They should secure a larger area than the actual crime scene

Explanation:

Officers should secure the scene by limiting access to the scene and movement within the scene

Three layers of secure perimeter should be used by officers to secure a crime scene, with the smallest inside perimeter being the actual crime scene

Next to the crime scene, is an inner perimeter which is the designated meeting point/command post

The outer perimeter, which is the third outer layer is to keep onlookers, passerby, and nonessential personnel at safety and out of the actual crime scene.

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A motorcycle traveling at 19 m/s starts to slow down steadily, then it stops completely in 10 seconds. What is the motorcycle ac
Dmitry [639]

Answer:

-1,9m/s^{2}

Explanatio:

a=\frac{v-v_{0} }{t}

=\frac{0-19}{10}=-1,9m/s^{2}

3 0
2 years ago
What temperature is absolute zero?<br> A. OK<br> B. 0°F<br> O C. O molecules<br> D. 0°C
KiRa [710]

Answer:

o k

Explanation:

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6 0
3 years ago
Read 2 more answers
The following steps are unbalanced half-reactions involved in the nitrogen cycle. Balance each half-reaction to show the number
Vadim26 [7]

This is an oxidation reaction. The balanced equation is as follows:

      6H₂O  + N₂ → 2NO₃⁻+ 12H⁺  + 6e⁻

Rules to balance redox reaction in acidic medium

  1. Write the given equation in ionic form
  2. Identify elements undergoing oxidation ( charge increase, O.N inc) and reduction (charge dec, O.N dec)
  3. Break the equation into two halfs
  4. Balance the half equations

A. Balance all other atoms except Oxygen and hydrogen

B. Balance oxygen by adding H2O to the side deficient in oxygen

C. Balance hydrogen by adding H+ ions

D. Balance charge by adding electrons

5. Add the two half such that electrons gets cancelled

Oxidation number of N in N2 is 0 while in NO₃⁻, it is +5. Thus there is an increase in oxidation number, thus oxidation is taking place.

              N₂(g) → NO₃⁻(aq)

  • balance N.

           N₂ → 2NO₃⁻

  • balance O by adding H2O

          6H₂O  + N₂ → 2NO₃⁻

  • Now balance Hydrogen

            6H₂O  + N₂ → 2NO₃⁻+ 12H⁺

  • balance charge. 0 charge on left, -6 and + 12 on right. add 6e⁻ on right to balance.

             6H₂O  + N₂ → 2NO₃⁻+ 12H⁺  + 6e⁻

Thus we can conclude that since there is increase in oxidation number, oxidation is taking place.

learn more about balancing redox reactions at brainly.com/question/10203480

#SPJ4

3 0
1 year ago
If 2.32 moles of iron react with excess oxygen gas, how many moles of Fe2O3 can be produced?
bearhunter [10]

Moles Fe₂O₃ produced : 1.16 moles

<h3>Further explanation</h3>

Given

2.32 moles of iron

Required

moles of Fe2O3

Solution

The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants and products)

Reaction

4 Fe + 3 O₂ ⇒  2 Fe₂O₃

From the equation, mol ratio Fe : mol Fe₂O₃ = 4 : 2, so mol Fe₂O₃ :

= 2/4 x mol Fe

= 2/4 x 2.32

= 1.16 moles

7 0
2 years ago
Given life’s diversity, scientists cannot say with certainty
Mandarinka [93]

Answer:

?

Explanation:

6 0
3 years ago
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