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3 years ago

What information can a foliated metamorphic rock provide you about the conditions under which it formed?

1 answer:

4 0

A foliated rock forms when the minerals are realigned due to the presence of high temperature and pressure. The minerals align in such a way that the axes are directed to where the pressure was applied.

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_______ is a media that consists of natural or synthetic mineral or plant substances that deposit crystalline or splinter-like f

diamong [38]

Answer : Option A) Dry media

Explanation : i) Dry media is a media that deposits graphite, charcoal, pastels, ordinary pencils, then moistened with a wet brush to get various painterly effects on the paper fibers.

ii) Silverpoint - Silverpoint media uses red chalk or traces of black pencil on white-coated paper usually the manuscripts,

iii) Ink Painting - Uses various inks on the paper.

iv) Liquid media - uses liquid pigments suspended in some base which in liquid state that soaks the paper.

3 0

4 years ago

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What ecosystems would be likely to have the greatest diversity

ozzi

Biodiversity is all ecosystems on Earth that support habitats. The ecosystem that wiuodl most likely hsve the greatest diversity woodlouse be the the jungke bevcause itb need the most baviar it need the right climate and also need s goalpost ster for sll the animals tht ;ive there.<span />

5 0

3 years ago

. The Henry's law constant for helium gas in water at 30 ∘C is 3.7×10−4M/atm; the constant for N2 at 30 ∘C is 6.0×10−4M/atm. a.

ludmilkaskok [199]

Explanation:

1) Henry's law states that the amount of gas dissolved or molar solubility of gas is directly proportional to the partial pressure of the liquid.

To calculate the molar solubility, we use the equation given by Henry's law, which is:

$M_{g}=K_H\times p_{g}$

where,

$K_H$ = Henry's constant

$p_{He}$ = partial pressure of gas

a) $K_H=3.7\times 10^{-4} M/atm$

$p_{He}=2.1 atm$

Putting values in above equation, we get:

$M_{He}=3.7\times 10^{-4} M/atm\times 2.1 atm = 7.77\times 10^{-4} M$

The solubility of helium gas is $7.77\times 10^{-4} M$

b) $K_H=6.0\times 10^{-4} M/atm$

$p_{N_2}=2.1 atm$

Putting values in above equation, we get:

$M_{He}=6.0\times 10^{-4} M/atm\times 2.1 atm = 1.26\times 10^{-3} M$

The solubility of nitrogen gas is $1.26\times 10^{-3} M$

a) Mass of solute or methanol , m= 14.7 g

Mass of solvent or water , m'= 186 g

Mass of the solution = M = m + m' = 14.7 g + 186 g = 200.7 g

$w/w\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

$=\frac{14.7 g}{200.7 g}\times 100=7.32\%$

The mass percent of methanol is 7.32%.

b) Molality is defined as moles of solute per kilograms of solvent.

$m=\frac{\text{Moles of solute}}{\text{Mass of solvent in kg}}$

Moles of methanol = $\frac{14.7 g}{32 g/mol}=0.4594 mol$

Mass of solvent = 186 g = 0.186 kg

$m=\frac{0.4594 mol}{0.186 kg}=2.4610 mol/kg$

The molality of methanol is 2.4610 mol/kg.

4 0

3 years ago

Melting, freezing, and boiling are __________ changes.

serg [7]

<span>Melting, freezing, and boiling are "Phase" Changes

Hope this helps!</span>

7 0

4 years ago

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What happens when nitrogen fills its valence shell?

DIA [1.3K]

Answer:

Option C = three electrons are gained, making N⁻³

Explanation:

Nitrogen is present in group 5A.

Its atomic number is seven.

It have five valance electrons.

Its electronic configuration is N₇ = [He] 2s² 2p³

In order to complete the valance shell or 2p subshell nitrogen must gain three more electrons.

When an atom gain the electrons anions are formed and negative charge is created on it.

When an atom lose its valance electrons cation is formed and positive charge is created.

That's why when nitrogen gain three electrons to complete the valance shell N⁻³ is formed.

4 0

3 years ago

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