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Leno4ka [110]
2 years ago
7

An unknown or changeable quantity is called a(n)...

Chemistry
2 answers:
Natali [406]2 years ago
7 0
<h2>Answer:</h2>

An unknown and changeable quantity is known as an variable.

<h3>Explanation:</h3>

There are two types of quantities:

Constant quantities:

Quantities which can not be changed by changing physical parameters and their value is normally known.

Variable quantities:

These quantities can be changed by changing the physical parameters or conditions. Due to which they are unknown for particular conditions and have to be measured.

givi [52]2 years ago
6 0
It is called a variable
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What is the reaction scheme for the experiment of synthesis of methyl salicylate
soldier1979 [14.2K]

The methyl salicylate (wintergreen oil) is the methyl ester of salicylic acid.

Methyl salicylate is produced by esterifying salicylic acid with methanol, the reaction scheme is attached to this answer. In the past, it was commonly distilled from the twigs of Betula lenta (sweet birch) and Gaultheria procumbens (eastern teaberry or wintergreen).

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3 years ago
One way to determine the degree of saturation of a solid-liquid solution is to drop a crystal of the solute into the solution.
Dafna1 [17]

The answer is D: Saturated.

A saturated solution is one in which the exact maximum amount of solute has been dissolved.  So, new solute will not dissolve in the solution.  In contrast, an unsaturated solution can hold more solute, so if that option were correct, the crystal would have dissolved.

The other two terms are a bit more complicated.  A supersaturated solution is one holding an amount of solute above the sustainable limit.  Because of that, when more solute is added, the solution will immediately adjust, and some solute will come out of solution in a precipitate.  Because the crystal isn't growing, we can eliminate this option.

A concentrated solution is one holding a relatively large amount of solute.  However, you can have concentrated solutions that are saturated and unconcentrated (the word for this is dilute) solutions that aren't saturated.  Therefore, we can say that because the crystal doesn't dissolve, this solution is saturated, but we can't say with certainty that it is concentrated.

Because the first three options are invalid, as described above, while the scenario does describe a saturated solution, D is the correct answer.

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3 years ago
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A small, hard-shelled fossil that resembles a modern-day ocean organism was found
Paul [167]

Answer:

The desert was one covered by ocean water.

Explanation:

5 0
2 years ago
Predict what kind of energy process happens when Lye, NaOH(s) is put in water and the water gets hot
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What happens is that the sodium solution when put in water reacts and creates thermal energy .
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Photon energy is proportional to which of the following quantities? speed of light in a vacuum frequency of the light emitting t
charle [14.2K]

Answer:

The energy of the photon is directly proportional to the  frequency of the light emitting the photon.

Explanation:

Energy of the photon is given by expression:

E=h\times \nu=\frac{hc}{\lambda }

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\nu  =  frequency of the light

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\lambda =Wavelength of the photon

E\propto \nu

The energy of the photon is directly proportional to the  frequency of the light emitting the photon.

5 0
3 years ago
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