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igor_vitrenko [27]
3 years ago
5

1. What types of evidence might be found at a bomb scene that could help

Chemistry
1 answer:
just olya [345]3 years ago
5 0

Answer:

Substances used to make the bomb

The area it was placed

Which people were in that area

How the bomb was set off

Explanation:

Examining the residues left at the scene by the bomb could tell forensics what the bomb was made out of, and the police could investigate possible leads about people who purchased (or have access to) such materials.

The area should give clues because security cameras could be used to trace who was there that should not be. There would be a possible suspect.

If it is a public place, then we can see if there is anyone of importance (to the suspect) that was there at that time.

If a remote detonator was used to set off the bomb, then the suspect would have to be relatively close to the bomb.

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A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 95.0°C if Ea =
never [62]

Answer:

k ≈ 9,56x10³ s⁻¹

Explanation:

It is possible to solve this question using Arrhenius formula:

ln\frac{k2}{k1} = \frac{-Ea}{R} (\frac{1}{T2} -\frac{1}{T1} )

Where:

k1: 1,35x10² s⁻¹

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R = 8,314472x10⁻³ kJ/molK

k2 : ???

T2: 95,0°C+ 273,15K = 368,15K

Solving:

ln\frac{k2}{k1} = 4,257

\frac{k2}{k1} = 70,593

{k2} = 9,53x10^3 s^{-1}

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I hope it helps!

5 0
3 years ago
Round each number to four significant figures
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