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Darya [45]
3 years ago
15

How do forensic scientists determine the time of death? There are timely pieces of evidence that help scientists with this task.

At the time of death:
~The heart stops

~The skin gets tight and grey in color

~Cell start to die (brain 3-7 min; skin up 24 hours)

~The muscles relax

~The bladder and bowels empty



And then what? Order these changes from FIRST to LAST.

Chemistry
1 answer:
UNO [17]3 years ago
8 0

I have done some research as well as asking some friends. This is what I came up with. Not sure if it is 100% correct.

step = time after death

1. Livor Mortis = 20-30 minutes

2. Eyes film (cloud) = 2 hours

3. Rigor Mortis begins = 4-6 hours

4. Empty small intestines = 12 hours

5. Bloating = 3-5 days

6. Decay

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If 42 grams of carbon and 52 grams of oxygen are used, how many grams of CO2 will be produced (Hint: find the
zavuch27 [327]

Answer:

71.5g

Explanation:

The reaction equation is given as:

               C  +  O₂  →  CO₂

Mass of C = 42g

Mass of O₂  = 52g

Unknown:

Mass of CO₂ produced  = ?

Solution

Now to solve this problem, we have to find limiting reactant which is the one given in short supply in this reaction.

 The extent of the reaction is controlled by this reactant.

Find the number of moles of the given species;

 Number of moles  = \frac{mass}{molar mass}

      Number of moles of C  = \frac{42}{12}   = 3.5mol

     Number of moles of O₂   = \frac{52}{32}   = 1.63mol

Now;

   From the balanced reaction equation;

           1 mole of C reacted with 1 mole of O₂

We see that C is in excess and O₂ is the limiting reactant.

            1 mole of O₂ will produce 1 mole of CO₂

 So;      1.63mole of O₂ will produce 1.63 mole of CO₂

Mass of CO₂ = number of moles x molar mass

       Molar mass of CO₂ = 44g/mol

Mass of CO₂ = 1.63 x 44 = 71.5g

8 0
2 years ago
If an element has a half life of one million years, how long will it take to be completely gone
Aleonysh [2.5K]
It should be 2 million years
3 0
2 years ago
A balloon has a volume of 1.40 L at 24.0ºC. The balloon is heated to 48.0°C. Calculate the new volume of the balloon.
ruslelena [56]

Answer:I am not sure how

Explanation: sorry free trial

5 0
3 years ago
NO LINKS!!!
Alex Ar [27]
Hey there!

Static electricity is a missing charge. When positive ions are formed (where an electron is missing), this imbalance is called static electricity.

7 0
2 years ago
Read 2 more answers
Calculate the molar concentration of the Cl⁻ ions in 0.098 M MgCl2(aq).
SVETLANKA909090 [29]
MgCl2(aq) is an ionic compound which will have the releasing of 2 Cl⁻ ions ions in water for every molecule of MgCl2 that dissolves.
MgCl2(s) --> Mg+(aq) + 2 Cl⁻(aq)
            [Cl⁻] = 0.098 mol MgCl2/1L × 2 mol Cl⁻ / 1 mol MgCl2 = 0.20 M
The answer to this question is [Cl⁻] = 0.20 M
6 0
2 years ago
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