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aleksley [76]
3 years ago
13

What is the most significant breakthrough in forensic science since the development of fingerprinting?

Chemistry
1 answer:
andreyandreev [35.5K]3 years ago
5 0
DNA testing which I think is the largest breakthrough.
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The symbol Ag stands for which element?
Sergeeva-Olga [200]

Answer:

Silver

Explanation:

I remember this because Ag can mean "Ain't Gold"

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3 years ago
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A cylinder with a piston is full of gas which of the following actions would result in an increase in the pressure of the gas be
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The answer is B. Decreasing the cylinder volume decreases the amount of space the gas has to occupy there for increasing pressure
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3 years ago
How does the density of a hershey bar compare to the density of the a half bar?
anastassius [24]

The density would be the same for the whole bar as well as one half of the bar. Density is a identity I believe, by this I mean that it stays the same no matter how little or how much of the same substance you have. Since density = mass / volume, half the bar has half of the weight as well as half of the volume of the whole bar, making the density the same.

For example, a block weighs 10 grams and has a volume of 5 ml. the density would be d = 10/5 or, d = 2g/ml

Half of the block weighs 5 grams and has a volume of 2.5 ml. The density is d = 5/2.5, or, d = 2 g/ml.

See, although there are different amounts of the same substance, their density is the same.

8 0
3 years ago
What are the equilibrium concentrations of pb2+ and f– in a saturated solution of lead(ii) fluoride if the ksp of pbf2 is 3.20×1
erica [24]
Answer is:  the equilibrium concentrations fluorine anion are 0.004 M and lead cation are 0.002 M.<span>
Chemical reaction: PbF</span>₂(aq) → Pb²⁺(aq) + 2F⁻(aq).<span>
Ksp = 3,2·10</span>⁻⁸.
[Pb²⁺] = x.
[F⁻] = 2[Pb²⁺] = 2x<span>
Ksp = [Pb²</span>⁺] · [F⁻]².
Ksp = x · 4x².
3,2·10⁻⁸ = 4x³.
x = ∛3,2·10⁻⁸ ÷ 4.
x = [Pb²⁺] = 0,002M = 2·10⁻³ M.
[F⁻] = 2 · 0,002M = 0,004 M = 4·10⁻³ M.

6 0
3 years ago
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Using logarithms, you determined the A)Solubility B)Temperatures C)ph
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Answer:

the answer is pH

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Just took it on ed2020

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3 years ago
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