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krok68 [10]
2 years ago
9

What is a DNA fingerprint and why is it considered individual evidence?

Chemistry
1 answer:
Ilia_Sergeevich [38]2 years ago
5 0

Answer:

<em>DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation.</em><em> </em>

<em>A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. If the two DNA profiles are a match, then the evidence came from that suspect.</em>

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Using the balanced equation for the combustion of ethane: 2C2H6 + 7O2 → 4CO2 + 6H2O, how many moles of O2 needed to produce 12 m
pickupchik [31]

Answer:

14 moles of oxygen needed to produce 12 moles of H2O.

Explanation:

We are given that balance eqaution

2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O

We have to find number of moles of O2 needed  to produce 12 moles of H2O.

From given equation

We can see that

6 moles of   H2O produced by Oxygen =7 moles

1 mole of   H2O produced by Oxygen=\frac{7}{6}moles

12 moles of H2O produced by Oxygen=\frac{7}{6}\times 12moles

12 moles of H2O produced by Oxygen=7\times 2moles

12 moles of H2O produced by Oxygen=14 moles

Hence, 14 moles of oxygen needed to produce 12 moles of H2O.

3 0
2 years ago
Why isn't geothermal energy used more often?
lianna [129]

Geothermal energy is not used more often because it's hard to find geothermal energy sources that are close to the surface (Option A).

<h3>What is Geothermal energy?</h3>

Geothermal energy is a special type of sustainable renewable source of clean energy that emerges from thermal (temperature) differences on the Earth, e.g., within geysers and similar geological formations.

In conclusion, geothermal energy is not used more often because it's hard to find geothermal energy sources that are close to the surface (Option A).

Learn more about Geothermal energy here:

brainly.com/question/19666326

#SPJ1

5 0
1 year ago
How many grams of butane can be burned by 1.42 moles of oxygen?
Mrrafil [7]

Answer:

So the molar mass of C4,H10 is

58.12g mole -1

6 0
3 years ago
Which statement correctly describes a chemical reaction?
Trava [24]
The correct answer is C
6 0
3 years ago
PLSSS HELP. And there’s also at the bottom of the picture another option if u didn’t see it
WARRIOR [948]

Answer:

B. Gradualism

Explanation:

8 0
2 years ago
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