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V125BC [204]
2 years ago
13

During metamorphic processes, increased pressure and temperature can affect the _______ of minerals in rock. Rocks subjected to

very high pressure are typically _______ than others because mineral grains are squeezed together, and the atoms are more closely packed. During metamorphic processes, water facilitates the transfer of ions between and within minerals, which can _______ the rate at which metamorphic reactions take place. The growth of new minerals within a rock during metamorphism has been estimated to be about _______ per million years. _______ metamorphism is commonly associated with convergent plate boundaries, where two plates move toward each other. During contact metamorphism, a large intrusion will contain _______ thermal energy and will cool much more slowly than a small one. Metamorphosed sandstone is known as _______. The metamorphic rock _______, made from metamorphosed shale, was once used to make blackboards for classrooms.
Chemistry
2 answers:
Temka [501]2 years ago
6 0

Answer:

Stability , Denser,  Increase, 1 millimetre, Regional, More, Quartzite, Slate

Explanation:

During metamorphic processes, increased pressure and temperature can affect the <u>stability</u> of minerals in rock. Rocks subjected to very high pressure are typically <u>denser</u> than others because mineral grains are squeezed together, and the atoms are more closely packed. During metamorphic processes, water facilitates the transfer of ions between and within minerals, which can <u>increase</u> the rate at which metamorphic reactions take place. The growth of new minerals within a rock during metamorphism has been estimated to be about <u>1 millimeter</u> per million years. <u>Regional</u> metamorphism is commonly associated with convergent plate boundaries, where two plates move toward each other. During contact metamorphism, a large intrusion will contain <u>more</u> thermal energy and will cool much more slowly than a small one. Metamorphosed sandstone is known as <u>quartzite</u>. The metamorphic rock <u>slate</u>, made from metamorphosed shale, was once used to make blackboards for classrooms.

Stells [14]2 years ago
4 0

Answer:

1.) stability

2.) denser

3.) increase

4.) 1 millimeter

5.) regional

6.) more

7.) quartzite

8.) slate

Explanation:

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Both Jacques Charles and Joseph Louis Guy-Lussac were avid balloonists. In his original flight in 1783, Jacques Charles used a b
daser333 [38]

Answer:

m_{Fe}=71.982 kg

Explanation:

First of all, we need  to calculate the moles of H2. Assuming the H2 is an ideal gas:

n=\frac{P*V}{T*R}

n=\frac{1atm*31100L}{294K*0.082 L*atm*mol^{-1}*K^{-1}}

n=1290 mol

Now, to produce 1 mol of H2 is required 1 mol of Fe:

m_{Fe}=n*M=1290mol*\{55.8 g}{mol}

m_{Fe}=71982 g=71.982 kg

3 0
2 years ago
Treating (CH3)3C-Cl with a mixture of H2O and CH3OH at room temperature would yield: A) CH2=C(CH3)2 B) (CH3)3COH C) (CH3)3COCH3
suter [353]

Answer:

All of the choices.

Explanation:

As the reaction is involving with a mixture of H₂O and CH₃OH, these two reagents can work as nucleophyle of the reaction. Both of them, are polar and promoves a Sn1/E1 reaction. When it reacts with water it will produce product B); it will form product C) when it reacts with methanol, and product A) will be formed when the reaction undergoes an E1 reaction.

In this case, the only way to show you this, it's doing the mechanism of reaction for each product. Picture attached show the mechanism for the formation of all these products.

5 0
2 years ago
Calculate the theoretical density of iron, and then determine the number of vacancies per cm3 needed for a BCC iron crystal to h
Ann [662]

Answer:

Therefore the theoretical density of iron is 7.877 g/cm³ .

Therefore the number of vacancy per cm³ is 3.27 \times 10^{20}

Explanation:

BCC structure contains 2 atoms per cell.

BCC : Body centered cubic.

Atomic mass of iron = 55.845 gram/mole.

Atomic mass of a chemical element is the mass of 1 mole of the chemical element.

Density: Density of a matter is the ratio of mass of the matter and volume of the matter.

Avogrdro Number is number of atoms per 1 mole.

Avogrdro Number= 6.023×10²³

Lattice parameter of iron = 2.866×10⁻⁸ cm

The theoretical density:

\rho=\frac{\textrm{(x atom/cell)} \times \textrm{(atomic mass)}}{\textrm{avogadro's number}\times \textrm{(lattice parameter)}^3}

 =\frac{2\times 55.845 }{(6.023\times 10^{23})\times (2.866\times 10^{-8})^3}   g/cm³      [x= 2,Since it is BCC structure]

=7.877 g/cm³

Therefore the theoretical density of iron is 7.877 g/cm³ .

Now we have to find out the number of unit cell of iron crystal having density  7.874 g/cm³.

\rho=\frac{\textrm{(x atom/cell)} \times \textrm{(atomic mass)}}{\textrm{avogadro's number}\times \textrm{(lattice parameter)}^3}

\Rightarrow 7.874 =\frac{x\times 55.845}{6.023\times 10^{23}\times (2.866\times 10^{-8})^3}

\Rightarrow x= \frac{7.874\times 6.023\times 10^{23}\times (2.866\times 10^{-8})^3}{55.845}

⇒ x =1.9923 atom/cell

Therefore the vacancy of atom per cell = (2- 1.9923)=0.0077

Vacancy\  per\ cm^3=\frac{\textrm{Vacancy per cm} ^3  }{\textrm{( lattice parameter)} ^3}

                          =\frac{0.0077}{(2.866\times 10^-8)^3}

                           =3.27 \times 10^{20}

Therefore the number of vacancy per cm³ is 3.27 \times 10^{20}

   

   

5 0
2 years ago
Which element can form a chloride with a general formula of MCl2 or MCl3
zhannawk [14.2K]
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Recall the elementary rules of oxidation numbers.

1. The sum of all oxidation numbers in a neutral compound is zero.
2. Chlorine, bromine, iodine have oxidation number of -1 ( except compounds with fluorine and oxygen)

Let oxidation number of element M be x.
Check rule 2. Chlorine has -1 oxidation number.

Now we write an equation of MCl₂ (neutral compound)
x + (2 * -1)= 0 ⇒ x₁= +2

For MCl₃
x + (3 * -1)=  0 ⇒ x₂= +3

So element has 2 different oxidation number in compounds, +2 and +3.

The element is iron (Fe) since it has +2 and +3  oxidation numbers in the compounds.

You need to learn it by hard. Unfortunately there is not an easier way to work out with these oxidation numbers.

The answer is iron (Fe).

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abruzzese [7]
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