All categories

2 years ago

Which is the first step in an arson investigation that helps reconstruct the fire?

Chemistry

2 answers:

Tamiku [17]2 years ago

8 0

C. taking samples of ignition source.

expeople1 [14]2 years ago

6 0

Answer is: B. taking photographs.
Fire scene investigation begins when investigator approaches the location and start observing the scene from a distance and begin photographing. That must be done first because crowd start gathering. Once the fire scene is secured, wintesses can be interviewed.

You might be interested in

A substance made of both metal and nonmetal atoms ?

Nat2105 [25]

A metalloid is a metal and a nonmetal

6 0

2 years ago

PLEASE I NEED HELP ILL GIVE BRAINLYEST

Drupady [299]

The percentage of CO2 increased 48 percent. Hope this helped!

7 0

2 years ago

Question 1 of 10 What is molarity a measurement of? O A. The volume of liquid containing a dissolved substance B. The grams of a

Nuetrik [128]

Answer:

Explanation:

D. The number of moles of a dissolved substance

7 0

3 years ago

Read 2 more answers

Water is boiled in a flask with a balloon over the top of the water gets the balloon expand what has happened to the weight of t

Verdich [7]

It decreases since a air less balloon is heavier than a Aired balloon

7 0

2 years ago

An "extensive property" is a material property that depends on the amount of material present in a sample. An "intensive propert

TEA [102]

Answer: Rate of reaction is an "extensive property". Rate of generation of a chemical species is an "intensive property"

Explanation:

Let´s check out the Factors that affect the speed of reactions:

Temperature, Physical state of the reagents, Presence of a catalyst, Pressure, light, Concentration of the reagents.

When having a general chemical reaction like this:

aA + bB → cC + dD

Usually the rate of reaction is represented by the next equation

$Rate = k [A]^{x} [B]^{y}$

Where k= constant

x, y = reactant orders

A, B = reactant concentration

As we can see in the last equation, the rate of reaction depends directly of the amount of material present in a sample, that is why it is an "extensive property"

The rate of generation of a chemical species, depends of other factors like Temperature, Presence of a catalyst, Pressure. As we can see all the factors that allow the speed of generation of a new chemical species let us know that this is an intensive property because it doesn´t depends of the amount of material.

7 0

2 years ago