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3 years ago

What gives the gem amethyst its purplish color?

Chemistry

2 answers:

Aleks [24]3 years ago

6 0

Answer will be B:Iron

Triss [41]3 years ago

3 0

Structure. Amethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, iron impurities (in some cases in conjunction with transition element impurities), and the presence of trace elements, which result in complex crystal lattice substitutions.

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A 25 mL syringe is used to measure both 10mL of a solution and 20mL of a solution. Which measurement, if any, has the biggest pe

Minchanka [31]

All measuring devices have some given error in their measurements, such that the percent error is given by 100% times the quotient between the error and the measure itself.

From this, we will see that the 10mL measurement has the largest percentage error.

Here we have a 25 mL syringe, and we want to use it to measure both 10mL of a solution and 20 mL of a solution.

We do not to do any math to know that the smaller quantity will have a bigger percentage error.

Why? Well, because the syringe is the same in both cases, so the numerator in the fraction that gives the percentage error will be the same for both measures.

So the only thing that defines the percentage error will be the measure itself that goes in the denominator. Thus, having a smaller measure means that the denominator is smaller, so the fraction is larger, thus the percentage error is larger.

For example, just to also show some numbers, if the error of the syringe is 0.5 mL, the percentage error for the 10 mL measure is:

p₁ = 100%*(0.5 mL)/(10 mL) = 5%

While for the 20 mL measure the percentage error is

p₂ = 100%*(0.5mL/20mL) = 2.5%

If you want to learn more, you can read:

brainly.com/question/4170313

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3 years ago

Explain interaction between sun system and hydrosphere

qwelly [4]

Both the Sun and the Earth are sources of heat that power an interconnected set of dynamic systems (lithosphere, hydrosphere & cryosphere, atmosphere, biosphere).

Within the Sun, heat is transferred by radiation and convection, which involves circulation of hydrogen ions. Within the Earth heat is transferred by conduction and convection, which involves circulation of silicates in the mantle and the crust, and by the circulation of iron in the liquid outer core. On the surface of the Earth and the atmosphere, heat emanating largely from the Sun is transferred by convection, which involving the circulation of water and carbon. Both the Sun and the Earth and their atmospheres are layered. Both systems evolve and change.

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4 years ago

What occurs when solid A, at 50.0°C, is place in liquid B, at 80.0°C?

mestny [16]

B I do believe I could be wrong

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3 years ago

How do the internal structures of vascular and plants transport food and water.

mariarad [96]

All vascular plants have vascular tissue which allows the transport of water, nutrients and food between the ground and the body of the plant. So your answer would be that the internal structures of vascular plants transport food and water through their vascular tissue. Hope this helps!

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4 years ago

Read 2 more answers

If a solid, a liquid, and a gas of a substance are each in separate covered jars, then the amount of kinetic energy of the parti

allsm [11]

Answer:

false

Explanation:

i had the same thing to do

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4 years ago