. The black, gooey liquid, which contains a mixture of combustible hydrocarbons along with small amounts of sulfur, oxygen, and nitrogen impurities and enters the refining process, is called ____ oil.
a. diesel
b. crude
c. heavy
d. proven
e. natural

you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

First, calculate the amount of HCl present in 10mL of the solution with a pH of 3:

10mL x 0.1M = 1 mmol HCl

Then, calculate the amount of HCl required to raise the pH to 6:

1 mmol HCl x (10^3 - 10^6) = 9 mmol HCl

Finally, calculate the amount of water required to add 9 m mol of HCl to the solution:

9 mmol HCl x (1L/1000 mmol HCl) = 9L water

Hence, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

What is ph?

pH is a measure of acidity and alkalinity. It is measured on a scale of 0 to 14, with 0 being the most acidic and 14 being the most basic (alkaline). A pH of 7 is neutral.

Therefore, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

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Answer:

0.481 M

Explanation:

The molarity ratio looks like this:

Molarity = moles / volume (L)

Since you have been given both the mass and volume, you can plug them into the equation to find the molarity.

Molarity = moles / volume

Molarity = 0.650 moles / 1.35 L

Molarity = 0.481 M

The formula that represents ionic compounds is NaCl, MgO, KBr, and CaF2; while those that represent covalent compounds are H2O, CH4, CO2, and NH3. Option D is correct .

Ionic compounds are formed by the transfer of electrons, while covalent compounds are formed by sharing of electrons. An ion is an atom that has either gained or lost electrons to get a stable electron configuration. A positive ion is formed when an atom loses one or more electrons. A negative ion is formed when an atom gains one or more electrons. The structure of an ionic compound is typically crystalline.

                                       A crystal lattice structure is made up of repeating patterns of ions. They have high melting and boiling points, do not dissolve in nonpolar solvents, and can be electrically conductive when dissolved in water. They are usually solids at room temperature.Covalent compounds are made up of non-metals. The atoms share electrons to create covalent bonds in a covalent compound. Each molecule in a covalent compound has a definite shape.

                       They have lower melting and boiling points than ionic compounds, dissolve easily in nonpolar solvents, and do not conduct electricity. They can exist as a gas, liquid, or solid at room temperature.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Plants can be defined as multicellular organisms that has the ability to manufacture or produce their own food.

The multicellular organisms are those organisms that are made up of various cells which work together to maintain the functionality of the living organism.

The plant can be described as a multicellular organism as it contains cells such as:

The plants are also has the ability to manufacture their own food due to the presence of the green pigment called the chloroplast.

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The Bohr radius is a fundamental constant in atomic physics that represents the average distance between the nucleus and the electron in a hydrogen atom. The value of the Bohr radius is approximately 0.529 Å (angstroms) or 52.9 pm (picometers).

The Bohr radius (a₀) is a physical constant derived from the Bohr model of the hydrogen atom. It represents the average distance between the nucleus (a single proton) and the orbiting electron in a hydrogen atom. The Bohr model assumes that the electron moves in circular orbits around the nucleus, and the radius of the orbit depends on the energy level of the electron.

The value of the Bohr radius is approximately 0.529 Å (angstroms) or 52.9 pm (picometers). This value is commonly used as a unit to measure atomic sizes and distances. The picometer (pm) is a convenient unit for expressing atomic scales, as it is equivalent to 10^(-12) meters.

The Bohr radius provides a scale for understanding the size of atoms and their electronic structure. It is particularly relevant in hydrogen-like systems, where the electronic structure is similar to that of a hydrogen atom with a single electron orbiting a central nucleus.

The Bohr radius allows scientists to estimate the average size of atomic orbitals and the distances between atoms in molecules.

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Answer:

groups and periods

Explanation:

Answer:

The answer is the 2nd one down: The green house affect

Answer:

Be3N2

Explanation:

u cross multiply with their subscripts

Answer :Phosphorus P 32.6138

Oxygen O 67.3862

Explanation: Phosphorus P 32.6138

Oxygen O 67.3862

The pH of 1 X 10-2 M HCN acid is 5.7

D) between 4 and 7

HCN is weak acid dissociate as

HCN  + H2O   \rightleftharpoons  H3O+  +  CN-

Ka = [CN- ][H3O+] / [HCN]

but  [CN- ] = [H3O+] = x

Ka = [x][x] / [HCN]

Substitute the value in equation

4.0X 10-10 = [x]2/ 1 X 10-2

[x]2 = 4.0X 10-10 X1 X 10-2  = 4.0 X 10-12

[x] = 2.0 X 10-6 M

Concentration of H3O+ = 2 X 10-6 M

pH = - log[H3O+]

pH = - log (2 X 10-6)

pH = 5.7

Prussic acid, also known as hydrogen cyanide, is a chemical substance with the formula HCN and the structural formula HCN. It is a colourless, incredibly poisonous, and flammable liquid that boils at 25.6 °C (78.1 °F), just slightly above room temperature.

Industrial-scale HCN production makes it a highly prized precursor to a wide range of chemical compounds, from pharmaceuticals to polymers. Production of potassium cyanide and adiponitrile, which are used in mining and plastics, respectively, has large-scale applications. Due to its volatile nature, it is more toxic than cyanide compounds that are solid.

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The shape is tetrahedral, ideal bond angle(s) is 60 degree, and the direction of any deviation is away from axis from those angles for IF₄⁻.

Bond angles affect how a molecule is structured as well. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetrahedral, trigonal-bipyramidal, and octahedral structures. The VSEPR theory is supported by the ideal bond angles, which demonstrate the maximum angle at which repulsion would be minimized.

In essence, bond angles show that electrons prefer to be far apart. Electrons make up negative ions. The opposites don't attract one another. Now draw a contrast. You don't want to interact with a negative individual because they are often thought of as unpleasant or harsh.

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Answer:

The answer is B Isotopes

Answer:

no water isn't wet.

Explanation:

Water isn't wet by itself, but it makes other materials wet when it sticks to the surface of them

A lizard basking in the morning sun is an example of behavior known as thermoregulation. Thermoregulation is a behavior that allows animals to control their body temperature by adjusting to the surrounding environment.

A lizard basking in the morning sun is an example of this behavior, as it is a common way for reptiles to regulate their temperature. By absorbing heat from the sun, the lizard can increase its body temperature to an optimal level that is necessary for its metabolic processes to function properly. This helps the lizard maintain its energy levels and overall health, and is crucial for survival in a changing and unpredictable environment. Thermoregulation is an important adaptation that has evolved in many species to help them cope with variations in temperature, and is essential for their survival.

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Three is no change in the blue litmus but the red litmus change color. This is because the ammonia turns red litmus blue due to ammonia.

When ammonium chloride and sodium hydroxide are mixed, they undergo a neutralization reaction to form ammonium hydroxide and sodium chloride. The chemical equation for this reaction is:

NH4Cl + NaOH → NH4OH + NaCl

In this equation, NH4Cl represents ammonium chloride, NaOH represents sodium hydroxide, NH4OH represents ammonium hydroxide, and NaCl represents sodium chloride.

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It is clear from the tabular data that, the monkeys in troop 2 were better to avoid predators and more of them  were able to reproduce. Hence, option D is correct.

In the biosphere, not all living things are fit to survive for a longer life time. Most of them are pray of other higher level animals. Some organisms adopt some strategies to hide from their predators and they can survive more.

It is clear from the table that, the monkeys residing in the ground are more prone to the attacks by their predators. Whereas monkeys living in trees can survive more.

In each year the survival rate is increasing for both troop. However the more number of monkeys which can sustain their population is in troop 2. Therefore, option D is correct.

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The gas sample is Cl₂. Answer A.

The ideal gas equation formula PV = nRT

Calculating the number of moles of the gas sample.

PV = nRT

1.04 × 1.365 = n × 0.0821 × 368

1.4196 = n × 30.21

n = 1.4196 ÷ 30.21

n = 0.04699 mol

The formula for mass and number of moles m = n × Mr

Calculating the molar gas from the sample

Mr = m ÷ n
Mr = 3.33 ÷ 0.04699

Mr = 70.9 g/mol

From the info given, gas Cl₂ has the same molar mass as the sample.

So, the gas sample is Cl₂, chlorine gas.

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Answer: With the portion of hydrogen, all atoms have three parts. The parts of an atom are protons, electrons, and neutrons. A proton is accurately charged and is located in the center or nucleus of the atom. Electrons are negatively charged and are located in rings or orbits spinning around the nucleus.

Explanation: I hope this was helpful.

Answer:

Iron is  element

Explanation:

Answer: element

Explanation: Iron is an element in the periodic table. Nowadays, itis one of the most common elements we use today. The answer is element because iron is an element. It has electrons and protons and atoms.

Hope this helps you!

The molar mass of ethanol is 46.069 g/mol because it has 2 mol of carbon atoms (2 12.011 g), 6 mol of hydrogen atoms (6 1.0079 g), and 1 mol of oxygen atoms (1 15.9994 g) in 1 mol.

Ethanol has a molar mass of 46 gmol-1.

Because you already know, molar mass refers to the entire mass of one molecule of a certain substance, and the basic chemical formula of ethanol is C2H5OH. So, if there are numerous atoms in a compound, we may calculate its molar mass by adding up the masses of its constituent atoms and multiplying the result by the number of atoms. We may calculate the molar mass of ethanol as 2x(molar mass of carbon) + 6x(molar mass of hydrogen) + 1x(molar mass of oxygen), or 2x12 + 6x1 + 1x16 = 24 + 16 + 6 = 46, since ethanol contains two carbon atoms, six hydrogen atoms, and one oxygen atom.

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Answer: \(Fe^{3+} > Mn^{4+}\) > \(V^{3+}\) = \(Ni^{2+}\) > \(Cu^+\)

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

Fe: 26: \(1s^2s^22p^63s^23p^64s^23d^{6}\)

\(Fe^{3+}:23:1s^2s^22p^63s^23p^63d^{5}\) : 5 unpaired electrons

Mn: 25: \(1s^2s^22p^63s^23p^64s^23d^{5}\)

\(Mn^{4+}:23:1s^2s^22p^63s^23p^63d^{3}\) : 3 unpaired electrons

V: 23: \(1s^2s^22p^63s^23p^64s^23d^{3}\)

\(V^{3+}:23:1s^2s^22p^63s^23p^63d^{2}\) : 2 unpaired electrons

Ni : 28 : \(1s^2s^22p^63s^23p^64s^23d^{8}\)

\(Ni^{2+}:23:1s^2s^22p^63s^23p^63d^{8}\): 2 unpiared electrons

Cu : 29 : \(1s^2s^22p^63s^23p^64s^13d^{10}\)

\(Cu^{+}:23:1s^2s^22p^63s^23p^63d^{10}\): 0 unpaired electrons

Thus the order of decreasing number of unpaired electrons:

\(Fe^{3+} > Mn^{4+}\) > \(V^{3+}\) = \(Ni^{2+}\) > \(Cu^+\)

The empirical formula of the solvent is CH4.

Relative number of atoms

Of H= 25/1 = 25

Of C= 75/12 = 6.25

What is a solvent?

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Answer:

The answer should be fulcrum

Explanation:

It would be easier if you game me choices to pick from

Answer:

i- In beaker A, sodium chloride will dissolve with water.

  and in beaker B, there will be no reaction.

ii- sodium chloride is soluble in water, while sand is insoluble.

iii- The reaction can be increased by adding more sodium chloride to the beaker.

iv- The sodium chloride will no longer dissolve in the water.

The ideal pressure exerted by the helium gas is 426580 Pa.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that the parameters of Helium gas are

T = 77 K

m = 2 g

V = 1.5 L = 1.5 x 10¯³ m³

Mr He = 2

By substituting the given parameters, we can calculate the pressure

P . V = n . R . T

P . 1.5 x 10¯³ = 2 / 2 . 8.31 . 77

P = 426580 Pa

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Explanation:

The reaction between magnesium ribbon and dilute hydrochloric acid is a classic example of a single replacement reaction, which can be represented by the following chemical equation:

Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

In this reaction, magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2).

The rate of this reaction can be altered by changing the concentration of the hydrochloric acid. This is because the rate of a chemical reaction depends on the concentration of the reactants. Specifically, the rate of the reaction is proportional to the concentration of the reactants raised to some power, which is determined by the reaction's rate law.

In this reaction, the rate law can be expressed as:

Rate = k [Mg] [HCl]^x

Where k is the rate constant and x is the order of the reaction with respect to hydrochloric acid. The order of the reaction with respect to magnesium is one, since the concentration of magnesium does not change during the reaction.

When the concentration of hydrochloric acid is increased, the rate of the reaction increases because there are more hydrochloric acid molecules available to collide with magnesium atoms and react. This means that the value of x is greater than zero and the reaction is dependent on the concentration of hydrochloric acid.

Conversely, when the concentration of hydrochloric acid is decreased, the rate of the reaction decreases because there are fewer hydrochloric acid molecules available to react with magnesium. This means that the value of x is less than one and the reaction is not entirely dependent on the concentration of hydrochloric acid.

Condensed structural formulas are written in a single line to save space and make them easier and faster to type out. They display the atoms' positions similarly to a structural formula.

The only amino acid that has one carbon atom is glycine. \($-\mathrm{COOH}$\) plus one \($-\mathrm{NH}_2$\) group that is connected to an alpha-carbon and contains two hydrogens. - \($\mathrm{COOH}$\) Serine is made up of an a-carbon, one hydrogen, and one \($-\mathrm{NH}_2$\) group as well as one  \($-\mathrm{CH}_2 \mathrm{OH}$\)group.

Both glycylserine and serylglycine are dipeptide molecules made up of glycine and serine; however, glycylserine has an amide linkage formed when one H of the \($-\mathrm{NH}_2$\) group of glycine condenses with the - \($\mathrm{OH}$\) of the - \($\mathrm{COOH}$\) group of glycine Comparably, in serylglycine, one  -OH of the - \($\mathrm{COOH}$\) group of serine condenses with one H of the \($-\mathrm{NH}_2$\) group of serine. Serine and glycine are the two byproducts of the hydrolysis of serylglycine. The rupture of the amide bond is seen by the red line. The glycine, serine, and alanine amino acids that make up this tripeptide structure are connected by amide bonds.

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The property of the product that allows us to use HNMR to analyze cis and trans products is the fact that the two products have different numbers of peaks in their spectra.

Spectra is the range of all electromagnetic radiation, from the longest wavelengths (such as radio waves) to the shortest (such as gamma rays). It is a way of visualizing the amount of energy that is emitted at different frequencies and wavelengths. Spectra can be used to analyze light and other forms of electromagnetic radiation, such as X-rays and ultraviolet radiation. Spectra can also be used to study the composition and structure of stars, galaxies, and other astronomical objects. Spectra can also be used to identify elements and compounds, which can be used to study the makeup of a material or to detect the presence of certain substances.

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For the number less than 0.1 such as 0.006, the zeroes to the right of the decimal point but before the first non zero digit show the decimal place of the first significant digit.

There is only one significant figure in the provided number 0.06. The decimal place of the first digit is indicated by the zeros that appear to the right of the decimal point but before the first non-zero digit.

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