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Firdavs [7]
3 years ago
11

What is the primary consideration in choosing a solvent for crystallizing a compound

Physics
1 answer:
Nina [5.8K]3 years ago
6 0

Answer:

1. The compound should be dissolved at the solvent boiling point.

2. It should be better none of the compound dissolve while at room

   temperature.

3. The compound must have lower boiling point (low boiling point) than

    melting point in hot solvent so to avoid it melts.

4. The compound have different solubility and impurity.

Explanation:

in order a compound to have a good crystallization, these are the primary consideration that should be followed.

1. The compound should be dissolved at the solvent boiling point.

2. It should be better none of the compound dissolve while at room

   temperature.

3. The compound must have lower boiling point (low boiling point) than

    melting point in hot solvent so to avoid it melts.

4. The compound have different solubility and impurity.

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Sonja [21]

Answer:

As 20/100 E= 1000

E= 10,000/2

=5000J

3 0
3 years ago
A battery is replaced with one of lower emf. State and explain how the resistance of the lamps would have to change in order to
kow [346]

The brightness of the lamp is proportional to the current flowing through the lamp: the larger the current, the brighter the lamp.

The current flowing through the lamp is given by Ohm's law:

I=\frac{V}{R}

where

V is the potential difference across the lamp, which is equal to the emf of the battery, and R is the resistance of the lamp.

The problem says that the battery is replaced with one with lower emf. Looking at the formula, this means that V decreases: if we want to keep the same brightness, we need to keep I constant, therefore we need to decrease R, the resistance of the lamp.

3 0
3 years ago
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vladimir2022 [97]

Answer:

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Explanation:

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3 0
3 years ago
Read 2 more answers
The specification limits for a product are 8 cm and 10 cm. A process that produces the product has a mean of 9.5 cm and a standa
My name is Ann [436]

Answer:

The value of Cpk is 0.83.

Explanation:

Given that,

Upper specification limits = 10 cm

lower specification limits = 8 cm

Mean = 9.5

Standard deviation = 0.2 cm

We need to calculate the process capability

Using formula of Cpk

Cpk=min(\dfrac{USL-mean}{3\times SD}, \dfrac{mean-LSL}{3\times SD})

Put the value into the formula

Cpk=min(\dfrac{10-9.5}{3\times0.2}, \dfrac{9.5-8}{3\times0.2})

Cpk=min(0.83,2.5)

Cpk=0.83

Hence, The value of Cpk is 0.83.

4 0
2 years ago
If displacement covered by a particle is zero then distance cover by it<br>​
sleet_krkn [62]

Answer:

When displacement is zero, the particle may be at rest, therefore, distance travelled = 0.

Again, when displacement is zero, the final position matches with the initial position after some time, but the distance travelled will not be zero.

7 0
2 years ago
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