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3 years ago

How can parts of a solution be separated by chromatography?

Physics

2 answers:

zysi [14]3 years ago

3 0

The parts of a solution be separated by chromatography as "the solution is absorbed onto a paper".

Answer: Option D

Explanation:

A solution is a homogeneous mix of two substances or more. When chemists have to evaluate what components in a solution or other mixture are available, they often use a method called chromatography.

One easy way to determine how chromatography extracts the components of a solution is to look at what happens when a scrap of paper that is written on it becomes wet. Paper chromatography is an experimental tool used to distinguish compounds or colored chemicals.

lutik1710 [3]3 years ago

3 0

Answer:

Explanation:

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igomit [66]

Answer:

$W_2=-12J$

Explanation:

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And then using Newton's 2dn Law we can obtain the net force F=ma, thus we will have $F_2=F-F_1=ma-F1=\frac{mv_f^2}{2d}-F_1$

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With our values:

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$W_1+W_2=K_f-K_i=K_f=\frac{mv_f^2}{2}$

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3 years ago

A farmhand pushes a 26-kg bale of hay 3.9 m across the floor of a barn. If she exerts a horizontal force of 88 N on the hay, how

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Answer:

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Explanation:

Given that,

Mass of bale of hay = 26 kg

Horizontal force exerted = 88 N

Distance moved, d = 3.9 m

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Put all the values,

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3 years ago

The sound intensity from a jack hammer breaking concrete is 2.0W/m2 at a distance of 2.0 m from the point of impact. This is suf

kupik [55]

Answer:

(a) $I_{1}=3.2*10^{-3}W/m^{2}$

(b) $\beta =95dB$

Explanation:

Given data

Distance r₁=50 m

Distance r₂=2 m

Intensity I₂=2.0 W/m²

To find

(a) The Sound Intensity I₁

(b) The Sound Intensity level β

Solution

For (a) the Sound Intensity I₁

$\frac{I_{1} }{I_{2}}=\frac{(r_{2})^{2} }{(r_{1})^{2} }\\I_{1} =I_{2}(\frac{(r_{2})^{2} }{(r_{1})^{2} })\\I_{1}=(2.0W/m^{2} )(\frac{(2m)^{2} }{(50m)^{2} })\\I_{1}=3.2*10^{-3}W/m^{2}$