Dead plant material can be compressed into coal (organic). the rock gets buried within the earth. the heat and pressure from the overlying material turn this coal into anthracite coal. what types of rocks are being described in this process? *


a: sedimentary and metamorphic

b: sedimentary and igneous

c: metamorphic and igneous

d: igneous, metamorphic and sedimentary

Mothballs are made of naphtalene. The chemical structure of naphthalene is formed by two benzene rings, which gives this substance the classification of an aromatic compound.

The active principle of naphthalene is explained by a very interesting physical characteristic: sublimation, which is defined as the direct transition from a solid to a gaseous state. Once sublimated, naphthalene appears as a toxic vapor for undesirable microorganisms.

So, when a bag of mothballs is opened, they will sublime. So the molecules will not be able to come back to the bag, because they're in the gaseous state, which is too difficult for us to "pick up" the molecules of mothballs again and place them in their bag again.

It is like picking up water vapor, it is impossible.

Answer: Alternative "D"

There are thousands of hydrogen atoms so together they can let off or group up to form all four colors.

Hydrogen is a chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. Under standard conditions, hydrogen is a diatomic molecular gas of the formula H2. It is colorless, odorless, tasteless, non-toxic, and highly flammable.

Hydrogen is an energy carrier that can be used to store, transfer, and deliver energy generated from other energy sources. Hydrogen fuel can be produced today by several processes. The most commonly used methods today are natural gas reforming (a thermal process) and electrolysis. It is found in the Sun and most stars, and the planet Jupiter is composed primarily of hydrogen. On Earth, hydrogen is most abundant as water. As a gas in the atmosphere, it is present in trace amounts, less than 1 ppm by volume.

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Total, 8138 grams of H₂SO₄ in 5.0 x 10²⁶ molecules of H₂SO₄, and there are  1.0 x 10²⁷ hydrogen atoms in 5.0 x 10²⁶ molecules of H₂SO₄.

To calculate the number of grams of H₂SO₄ in 5.0 x 10²⁶ molecules, we need to first determine the molar mass of H₂SO₄ and then use Avogadro's number to convert the number of molecules to grams.

The molar mass of H₂SO₄ is;

2(1.008 g/mol) + 32.066 g/mol + 4(16.00 g/mol) = 98.08 g/mol

Therefore, 1 mole of H₂SO₄ weighs 98.08 grams.

Using Avogadro's number (6.022 x 10²³ molecules per mole), we can convert the number of molecules to moles;

5.0 x 10²⁶ molecules / 6.022 x 10²³ molecules per mole = 83.0 moles

Finally, we can convert the number of moles to grams by multiplying by the molar mass;

83.0 moles x 98.08 g/mol = 8138 g

Therefore, there are 8138 grams of H₂SO₄ in 5.0 x 10²⁶ molecules of H₂SO₄.

To calculate the number of hydrogen atoms in this amount of H₂SO₄, we need to consider that each molecule of H₂SO₄ contains 2 hydrogen atoms.

The number of hydrogen atoms can be calculated by multiplying the number of molecules by the number of hydrogen atoms per molecule;

5.0 x 10²⁶ molecules x 2 hydrogen atoms per molecule = 1.0 x 10²⁷ hydrogen atoms

Therefore, there are 1.0 x 10²⁷ hydrogen atoms in 5.0 x 10²⁶ molecules of H₂SO₄.

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Answer:

Large leaves help plants to receive more sunlight when in tropical rainforests.

Answer:

yea hold them in your hand for a while and your hand will look like a rainbow

Explanation:

Answer:

1. Animals breathe in oxygen and breathe out carbon dioxide.

2. In sunlight, plants take in carbon dioxide and release oxygen.

Hope this answer will help you.

Answer:

air and breathe out carbon and plants take in sun light and realese clean air

Answer:

1. 0.422 atmospheres

2. 633281.25 Pascals

3. (a) Move up

(b) 868 mmHg

4. 868 mmHg

5. 775 mmHg

6. Partial pressure of He is 0.64 atm.

Partial pressure of oxygen is 1.29 atm.

Partial pressure of N is 2.57 atm.

7. 445.72 torr.

Explanation:

1. To convert 321  torr to atmospheres

1  atmosphere = 760 torr

∴ 1 torr = 1/760 atmospheres

Hence, 321 torr = 321 × 1/760 = 321/760 atmospheres = 0.422 atmospheres

2. To convert 6.25 atmospheres to Pascals, we have;

1 atmosphere = 101325 Pascals

∴ 6.25 atmospheres = 6.25 × 101325 Pascals = 633281.25 Pascals

3. (a) Here we have, given that the value of the pressure on the bottle = 830 mmHg, when the valve is opened, the mercury in the open-end arm will move up because the pressure of the gas inside the flask is more than the pressure on the other side of the open-end arm

(b) After the mercury stops moving the difference between the two columns will be the difference between the two pressures, that is 830 mmHg - 745 mmHg = 85 mmHg

4. From the diagram, it is seen that the differenc beteen the two columns is 123 mm, therefore, the pressure in the flask is 123 mmHg more than the external pressure, hence the pressure of the as in the flask = 745 mmHg + 123 mmHg = 868 mmHg

5. Here we have that the height of the mercury in the open-end is less than the height of the mercury on the arm closer to the flask, therefore, the pressure of the gas in the flask = 825 mmHg - 50 mmHg = 775 mmHg

6. Number of moles of He = 1 mole

Number of moles of oxygen, O = 2 mole

Number of moles of nitrogen, N = 4 mole

From Dalton's law of partial pressure we have that, the total pressure of a given mass of gas is equal to the partial pressure of the individual gases

\(That \ is \ \chi _i = \frac{n_i}{n_{total}} \ and \ P_i = \chi_i \cdot P_{total}\)

Hence;

Total number of moles = 1 + 2 + 4 = 7 moles

Mole fraction of He = 1/7

Partial pressure of He = 1/7×4.5 = 0.64 atm.

Mole fraction of oxygen, O = 2/7

Partial pressure of oxygen= 2/7×4.5 = 1.29 atm.

Mole fraction of N = 4/7

Partial pressure of N = 4/7×4.5 = 2.57 atm.

7. From Boyle's law

P₁×V₁ = P₂×V₂

Hence;

P₂ = P₁×V₁/V₂

Where:

P₁ = Initial pressure = 2.57 atm

V₁ = Initial volume =1.57 liters

V₂ = New volume = 6.88 liters

P₂ = New pressure = 2.57×1.57/6.88  = 0.59 atm.

To convert 0.59 atm. to torr, we multiply by 760 thus;

0.59 atm. = 0.59 × 760 torr = 445.72 torr.

Answer:

3, 5, 1000

Explanation:

I took the test.

Answer:The first one would be 3

The second is 5

And the last one is 1000

Explanation:

Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

Answer:

molerat

Explanation:

Answer:

3.28 mol

Explanation:

2 mol FeCl3 forms from 2mol of FeCl2

therefore 3.28 mol of FeCl3 forms from=2/2×3.28 mol=3.28 mol

The patient results were analyzed to determine the corresponding condition based on their blood gas values. The matches were identified as follows: Patient 1 had compensated D. respiratory alkalosis, Patient 2 had  uncompensated E. metabolic acidosis, Patient 3 had compensated C. respiratory acidosis, and Patient 4 had uncompensated E. metabolic acidosis.

To match the patient results to the corresponding type of condition, we can analyze the given data:

1. Patient 1: \(HCO_3\) = 24, \(CO_2\) = 45, pH = 7.6

  - \(HCO_3\) within normal range (22-28 mEq/L)

  - \(CO_2\) within normal range (35-45 mmHg)

  - pH slightly elevated (normal range 7.35-7.45)

  These values suggest a compensated respiratory alkalosis.

2. Patient 2: \(HCO_3\) = 17, \(PCO_2\) = 39

  - \(HCO_3\) below normal range

  - \(PCO_2\) within normal range

  These values indicate uncompensated metabolic acidosis.

3. Patient 3: \(HCO_3\) = 25, \(CO_2\) = 33

  - \(HCO_3\) within normal range

  - \(CO_2\) below normal range

  These values suggest a compensated respiratory acidosis.

4. Patient 4: \(HCO_3\) = 21, \(CO_2\) = 45, pH = 7.2

  - \(HCO_3\) below normal range

  - \(CO_2\) within normal range

  - pH decreased (acidic)

  These values indicate uncompensated metabolic acidosis.

Based on these analyses, we can match the patient results to the following conditions:

A. None of the answer choices are correct.

B. Metabolic alkalosis.

C. Respiratory acidosis.

D. Respiratory alkalosis.

E. Metabolic acidosis.

The correct matches would be:

Patient 1: D. Respiratory alkalosis.

Patient 2: E. Metabolic acidosis.

Patient 3: C. Respiratory acidosis.

Patient 4: E. Metabolic acidosis.

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Formation and dissociation constants are related in that they are inverses of each other and must have a product that equals the equilibrium constant of the reaction.

Formation and dissociation constants, also known as Kf and Kd respectively, represent the equilibrium concentrations of the reactants and products in a chemical reaction.

Kf is the constant of formation, which is the product of the concentrations of the products of the reaction, divided by the product of the concentrations of the reactants.

Kd is the dissociation constant, which is the product of the concentrations of the reactants, divided by the product of the concentrations of the products .

Kf and Kd are related in that the product of Kf and Kd must equal Kw, which is the equilibrium constant for the reaction.

The value of Kw is constant, meaning that regardless of the equilibrium concentrations of reactants and products, Kf and Kd must be inverses of each other such that the product of Kf and Kd must equal Kw.

Therefore, formation and dissociation constants are related in that they are inverses of each other and must have a product that equals the equilibrium constant of the reaction.

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Answer:

Surface

Explanation:

The concentration of hydroxide ions in a solution with a pH of 4.80 is approximately 6.3 x 10^(-10) M.(option.b)

To find the concentration of hydroxide ions in a solution with a pH of 4.80, we will first calculate the concentration of hydrogen ions and then use the relationship between hydrogen ions and hydroxide ions to find the concentration of hydroxide ions.

Step 1: Calculate the concentration of hydrogen ions
The pH of a solution is defined as the negative logarithm of the hydrogen ion concentration:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions. To find the concentration of hydrogen ions, we can rearrange this formula as:

[H+] = 10^(-pH)

Now, plug in the given pH value of 4.80:

[H+] = 10^(-4.80)

[H+] ≈ 1.6 x 10^(-5) M

Step 2: Use the relationship between hydrogen and hydroxide ions
The relationship between the concentrations of hydrogen ions and hydroxide ions in a solution can be represented by the ion product constant for water (Kw):

Kw = [H+][OH-]

At 25°C, the value of Kw is 1.0 x 10^(-14). We can rearrange this equation to solve for the hydroxide ion concentration:

[OH-] = Kw / [H+]

Now, plug in the values for Kw and [H+] that we found in the previous steps:

[OH-] = (1.0 x 10^(-14)) / (1.6 x 10^(-5))

[OH-] ≈ 6.3 x 10^(-10) M

So, the concentration of hydroxide ions in a solution with a pH of 4.80 is approximately 6.3 x 10^(-10) M.

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Answer:

According to Avogadro's Law, as the number of moles of gas increases,the volume of the gas also increases.

Increasing the moles of gas results in an increase in the total number of gas particles, which then increases the volume that the gas occupies.

At constant temperature and pressure, the number of moles in a gas is directly proportional to its volume.

According to Avogadro's law, which is a fundamental gas law, the volume of a gas is directly proportional to the number of moles of the gas at constant temperature and pressure.

In simpler terms, as the number of moles of a gas increases, while temperature and pressure remain constant, the volume of the gas also increases.

Mathematically, Avogadro's law can be expressed as:

V ∝ n

Where:

V = Volume of the gas

n = Number of moles of the gas

This means that if you double the number of moles of a gas while keeping the temperature and pressure constant, the volume of the gas will also double.

Similarly, if you triple the number of moles, the volume will triple, and so on.

Avogadro's law is based on the concept that, at constant temperature and pressure, equal volumes of gases contain an equal number of particles (atoms, molecules, or ions).

Therefore, increasing the number of moles of a gas leads to an increase in the total number of gas particles, which in turn increases the volume occupied by the gas.

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Answer:

The formula for a molecular formed form N and Cl would be N\(Cl_{3}\).

According to the given configuration of Nitrogen(N) and Chlorine(Cl) we have,

N needs 3 electrons and Cl needs 1 electron to complete their octet.

Therefore, one atom of N will combine with three atoms of Cl.

So the molecular formula of the compound formed will be N\(Cl_{3}\).

The addition reaction is:

    N    +     Cl     ------->    N\(Cl_{3}\)

(nitrogen)   (chlorine)     ( Nitrogen(III) chloride)

Therefore the formula for a molecule formed from N and Cl would be N\(Cl_{3}\).

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Fundamentally, atoms are attempting to achieve the most stable (lowest-energy) state possible. When an atom's valence shell is fully populated with electrons or when they comply with the octet rule, a large number of them become stable (by having eight valence electrons).

What are electrons?

It is possible for an electron to be free or linked to an atom. An electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom. The nucleus of an atom is composed of protons, neutrons, and electrons.

Just one electron and one proton are present in the hydrogen atom, for instance. On the other hand, the uranium atom possesses 92 protons, which means 92 electrons.

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The condensation of water vapor in the atmosphere and subsequent transfer to the ocean via precipitation is an example of a Water Cycle.

Water cycle is also called hydrologic cycle that shows the continuous movement of water between the air and land.

There are four main stages in the water cycle:

Thus from the above conclusion we can say that The condensation of water vapor in the atmosphere and subsequent transfer to the ocean via precipitation is an example of a Water Cycle.

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The mass of Fe(NO3)2 is expressed as 24.7 kg, rounded to three significant figures.

In scientific notation, 24.7 kg can be written as 2.47 x 10^1 kg. The significant figures are determined by the non-zero digits in the number, which in this case is three: 2, 4, and 7. The exponent 1 represents the number of decimal places the decimal point has been moved to the right to convert from 24.7 to 2.47.

Expressing the mass to three significant figures ensures that the measurement is accurate and allows for appropriate precision in reporting the value. It indicates that the measurement was made with certainty up to the third decimal place.

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Answer:

... all of the ecosystems in the world

bio means life and sphere implies the world is how you can remember it.

Explanation:

Ala-Val dipeptide at neutral pH: Ala is negatively charged (COO-), Val is positively charged (NH3+).

(Ala-Val) is a dipeptide composed of two amino acids: alanine (Ala) and valine (Val). At neutral pH, the carboxyl group (COOH) of alanine loses its hydrogen ion (H+) and becomes negatively charged (COO-), while the amino group (NH2) of valine gains a hydrogen ion (H+) and becomes positively charged (NH3+).

The dipeptide can be represented as follows:

         H       H

         |       |

   H3N+-CH-C-COO-

         |       |

         CH3     CH(CH3)2

Here, the NH3+ represents the positively charged amino group of valine, and the COO- represents the negatively charged carboxyl group of alanine. The hydrogen atoms (H) are attached to the appropriate positions on the carbon backbone.

Please note that this is a simplified representation, and the actual structure of the dipeptide may have different conformations depending on the specific arrangement of atoms and bonds.

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The values of balanced chemical reaction is w = 1, x = 6, y = 3, and z = 2

To balance the chemical equation:

1. Balancing nitrogen (N):

There are three nitrogen atoms on the left side (Ba₃N₂), so we need to place a coefficient of 3 in front of NH₃:

w Ba₃N₂ + x H₂O → y Ba(OH)₂ + 3 z NH₃

2. Balancing hydrogen (H):

There are six hydrogen atoms on the left side (2 × 3), so we need to place a coefficient of 6 in front of H₂O:

w Ba₃N₂ + 6 H₂O → y Ba(OH)₂ + 3 z NH₃

3. Balancing barium (Ba):

There are three barium atoms on the left side (3 × Ba₃N₂), so we need to place a coefficient of 3 in front of Ba(OH)₂:

w Ba₃N₂ + 6 H₂O → 3 y Ba(OH)₂ + 3 z NH₃

4. Balancing oxygen (O):

There are six oxygen atoms on the right side (6 × OH), so we need to place a coefficient of 3 in front of Ba(OH)₂:

w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃

Now the equation is balanced with the following coefficients:

w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃

Therefore, w = 1, x = 6, y = 3, and z = 2 would satisfy the balanced chemical equation.

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Answer:

radiation

Explanation:

so that it can form to chemist thesis

Answer:

Zinc chloride (ZnCl2) has more chloride ions compared to sodium chloride (NaCl) because the zinc ion has a +2 charge, while the sodium ion has a +1 charge.

Chlorine (Cl) is a halogen element with a -1 charge when it gains an electron to form an ion. To form a neutral compound, the number of positive and negative charges must be balanced.

In NaCl, the sodium ion has a +1 charge and can only bond with one negatively charged chloride ion, which has a -1 charge. Therefore, the formula for sodium chloride is NaCl, with one sodium ion and one chloride ion.

In ZnCl2, the zinc ion has a +2 charge, and it requires two negatively charged chloride ions, each with a -1 charge, to form a neutral compound. Therefore, the formula for zinc chloride is ZnCl2, with one zinc ion and two chloride ions.

Thus, the reason why there are more chloride ions in the zinc compound is because the zinc ion has a higher charge compared to the sodium ion, and it requires two chloride ions to balance its charge, whereas sodium ion requires only one chloride ion.

Answer:

The element that has a valence configuration of 6s1 is option (a) K (potassium).

Explanation:

The electron configuration of an element describes how electrons are arranged in its atomic orbitals. The notation used to represent electron configuration follows a specific pattern. The first number represents the principal energy level (n), followed by the letter representing the type of orbital (s, p, d, f), and finally, the superscript denotes the number of electrons in that orbital.

In this case, the valence configuration is described as 6s1. The "6" indicates the principal energy level or shell (n = 6), and the "s" refers to the s orbital. The superscript "1" indicates that there is only one electron in the 6s orbital.

The options given are K (potassium), Rb (rubidium), Na (sodium), Cs (cesium), and Li (lithium). We need to determine which of these elements has an electron configuration that matches 6s1.

Among the options, only potassium (K) has an electron configuration of [Ar] 4s1, which corresponds to 6s1 after considering the previous energy levels. The noble gas abbreviation [Ar] indicates that the electron configuration of potassium is similar to that of argon (Ar) with a completed 3rd energy level. Following argon, the 4th energy level starts with the 4s orbital, and potassium has one electron in that orbital.

Therefore, the element with a valence configuration of 6s1 is potassium (K), option (a).

Please feel free to download and use my periodic table which has the orbital numbers along the sides and in some element blocks.

Answer:

7.827s

Explanation:

Given that

Height of the Eiffel tower is (h) =300.5m

Acceleration due to gravity (g) =9.81m/s2

From the kinematic equations

s =ut+(1/2)gt2

It is free fall then u =0

Then h =(1/2)gt2

Then the time taken for the croissant dropped before it tagged you on the head. is t =Sqrt(2h/g) =Sqrt(2*300.5/9.81)=7.827s

A bond with an annual coupon rate of 6.6 and a face value of $1,000 sells for $970, the bond’s current yield will be 6.8041 %.

Bond yield serves as an excellent indicator of the strength of a nation's stock market, which increases the demand for the nation's currency.

A bond's current yield as per the information will be calculated as follows:

The current yield = annual interest rate / current price

In this question, the annual interest rate = 1000 × 6.6 % = 66.

The current price is 970,

so, the current yield = 66 / 970 = 6.8041 %.

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