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3 years ago

What are minerals? What kinds of minerals are considered gems? (Site 1)

2 answers:

5 0

For your second question its Diamonds,Rubys, Emeralds.
And for your first question its :Minerals are natural: These substances that form without any human help.

Minerals are solid: They don't droop or melt or evaporate.

Minerals are inorganic: They aren't carbon compounds like those found in living things.

Minerals are crystalline: They have a distinct recipe and arrangement of atoms.

inn [45]3 years ago

5 0

Minerals are solid inorganic substances of natural occurrences.
Examples of minerals that would be considered gems are: Alexandrite, Diamond, Lapis, Paraiba, Ruby, and Topaz. There's 80, those are just a few.

I hope this helps! :>

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How many mg are in 125ml of<br> phosphoric acid?

strojnjashka [21]

Answer:

125000mg

Explanation:

1ml = 1000mg

125(1000) = <u>125000mg</u>

3 0

3 years ago

A mass spectrometer is being used to monitor air pollutants. It is difficult, however, to separate molecules with nearly equal m

tatyana61 [14]

Answer:

4.2 m

Explanation:

The energy (E) of the selector region of the spectrometer is:

E = v*B (equation 1)

Where v is the velocity, and B the magnetic field.

The force with which particle forms a curved path can be calculated by:

$\frac{mv^2}{r} = qB'$

Where r is the radius of the particle, m is the mass, and q the electric charge. So:

$r = \frac{mv}{qB'}$

For equation 1: v = E/B, so:

$r = \frac{mE}{qBB'}$

The two species will be separated by Δr = 0.42 mm

Δr = Δm*E/(q*B*B')

E/(q*B*B') = r/m

Δr = Δm*r/m

r = m*Δr/Δm

r is the large of curvature, m is the avarege mass = (28.0106 + 28.0134)/2 = 28.012:

r = (28.012*0.42)/(28.0134 - 28.0106)

r = 11.76504/(0.0028)

r = 4201.8 mm

r = 4.2 m

3 0

3 years ago

Describe how you would make 1.0 l of a supersaturated solution of cdi2

nirvana33 [79]

(Missing in the question) solubility in g per 100 mL of water:
CdI2 86.2 (cold water) so,
-We will heat a saturation solution of CdI2 [86.2 g / 100 mL], by the effect of the heat the solution will be unsaturated and dissolve more CdI2 when reaching a high temperature. and let the solution cools again by itself and covers it well to make sure there is no dust in it. when it reaches back to the cold water temperature, we will find the solution is supersaturated and all the solute will stay dissolved.

3 0

3 years ago

What is difference between an ionic bond and a covalent bond?

Firdavs [7]

In an ionic bonds, ions are bonded together by the attraction of oppositely charged ions. A covalent bond is a chemical bond where electron pairs are shared between elements. Hope this helps!

5 0

3 years ago

Lesson one review:

expeople1 [14]

Mixtures are impure substances composed of two or more substances physically combined.

<h3>What are mixtures?</h3>

Mixtures are substances that are composed of two or more substances physically combined.

Mixtures are one of the different types of substances which are composed of matter.

The classification of matter by type of substance is as follows:

Matter - Pure and impure substances or mixtures
Pure substances - elements and compounds
Mixtures: homogenous and heterogenous

In conclusion, substances can be classified into either pure substances or mixtures.

Learn more about substances and mixtures at: brainly.com/question/1867365

#SPJ1

7 0

2 years ago