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bulgar [2K]
3 years ago
10

How does magnification occur in an electron microscope?

Chemistry
2 answers:
Nady [450]3 years ago
3 0
An electron beam makes the object become larger.

Nikitich [7]3 years ago
3 0
<span>An electron beam makes the object become larger.

</span>
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what is the best course of action if solid material remains in the flask after the heating step of recrystallization
lys-0071 [83]

Answer:

filter the hot mixture.

Explanation:

Solid is stayed undissolved since the arrangement is gotten super saturated. On the off chance that solid molecule is available recrysallization won't happen in this way we need expel the solid molecule by filtarion in hot condition itself . Subsequently, arrangement become totally homogenous and recrysallization item will shaped by moderate cooling

7 0
4 years ago
You have a sample of each of the following five metals, with the mass and density
Sindrei [870]

Answer:

E) Silver, mass = 420 g, d = 10.5 g/cm.

Explanation:

Hello,

In this case, since the density is defined by:

\rho =\frac{m}{V}

Given the mass and density, we compute the volume via:

V=\rho *m

Thus, for each vase we have:

A) V=135g*2.7g/cm^3=364.5cm^3

B) V=305g*8.92g/cm^3=2720.6cm^3

C) V=240g*7.86g/cm^3=1886.4cm^3

D) V=75g*1.74g/cm^3=130.5cm^3

E) V=420g*10.5g/cm^3=4410cm^3

In such a way, the largest volume corresponds to E) Silver, mass = 420 g, d = 10.5 g/cm.

Best regards.

7 0
3 years ago
Which answer choice correctly describes what will happen to an element with four valence electrons if it engages in a chemical r
Andru [333]
The answer is D. It may gain or lose electrons.
6 0
3 years ago
Which anticholinergic agent is sometimes used to manage motion sickness when delivered by transdermal patch?
OlgaM077 [116]

Answer:

Scopolamine.

Explanation:

Scopolamine is also known as hyoscine. It is an anticholinergic, oral topical drug which is used to manage, and prevent motion sickness, and acute treatment. It is must be taken to be effective before the onset of motion sickness.

The scopolamine is helps to prevent communication between the vomiting center which is present in the brain, and the nerve of the vestibule by blocking the action of acetylcholine (it is a chemical which nervous used to transmit massage to each other).

8 0
3 years ago
In general, as you move from right to left across a period, the number of valence electrons
goblinko [34]
As you move from left to right across a period,the number of valence electrons<span>-increases. </span>
4 0
4 years ago
Read 2 more answers
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