A particular gas exerts a pressure of 3.38 bar. What is this pressure in units of atmospheres? (1 atm = 760 mm Hg = 101.3 kPa = 1.013 bar) Select one: a. 3.42 atm b. 2.54 × 103 atm c. 3.38 atm d. 2.6 × 103 atm e. 3.33 atm

Barium nitrate and sodium chloride do not react with each other because both of them are soluble in water. The chemical equation for the reaction between barium nitrate and sodium chloride is given below.

Ba(NO₃)₂ + 2NaCl → BaCl₂ + 2NaNO₃

The reaction between barium nitrate and sodium chloride is a double displacement reaction, where barium cation is exchanged with sodium cation and nitrate anion is exchanged with chloride anion. But the reaction does not occur due to the solubility of barium nitrate and sodium chloride in water.The solution of barium nitrate and sodium chloride will remain clear and colorless with no precipitation forming. In fact, it is a method of testing the presence of sulfate ions in a solution. A small amount of barium nitrate is added to the solution to form barium sulfate. Since barium sulfate is insoluble, it forms a white precipitate.

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1. SOCl2/pyridine

2. NH3

3. LiAlH4

4. H2O

SOCl2/pyridine is added to (S)-3-methyl-3-phenylpentanoic acid first in order to convert it to (5)-3-methyl-3-phenylpentanamine.

The carbonyl carbon is then reduced to an alkane by adding NH3 after which LiAlH4 is added. The mechanism is finished by the addition of water, which causes the product to form.

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The

Answer:

0 Celsius

Explanation:

its 0 degrees C

Answer:

0°C =  32°F

Explanation:

The incident electron beam must have enough energy to overcome the interatomic interactions holding the atoms in place in the crystal lattice in order to produce a diffraction pattern for a surface with crystal spacing of 4.0.

The Bragg equation specifies the minimal energy needed for an electron with a de Broglie wavelength of to diffract off a crystal lattice with spacing d: We can change the equation 2d sin(n) = n to: h/p = h/square (2meV)

we discover that 2d sin() = n h / sqrt (2meV)

When we solve for V, we obtain: V = h2 / (2me * 2)

The electron's mass, m, is equal to 9.11 x 10-31 kg, and its charge, e, is equal to 1.60 x 10-19 C. By substituting these values for the given crystal spacing, d = 4.0 = 4.0 x 10-10 m, and assuming that n = 1 (the first-order diffraction peak), and = 90° (the maximum diffraction), we obtain: = 2d /

Therefore,For a surface with a crystal spacing of 4.0, the minimal electron energy needed to produce the diffraction pattern is roughly 41.9 electron volts (eV).

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The equilibrium constant, Kc, is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients.

For a reaction: aA + bB→ cC + dD

Equilibrium constant: Kc=\([C]^{c}[D]^{d}\)/ \([A]^{a} [B]^{b}\)

Characteristics of Kc:

1) Equilibrium can be approached from either direction.

2) Kc does not depend on the initial concentrations of reactants and products.

3) Kc does depend on temperature.

Magnitude of Kc:

1) If the Kc value is large (Kc >> 1), the equilibrium lies to the right and the reaction mixture contains mostly products.

2)  If the Kc value is small (Kc <<1), the equilibrium lies to the left and the reaction mixture contains mostly reactants.

3) If the Kc value is close to 1 (0.10 < Kc < 10), the mixture contains appreciable amounts of both reactants and products.

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Let's try to understand. Hope this picture can help you:D

The formal charge on B = -1

Formal charge on F forming two bonds = +1

Formal charge on F forming one bond = 0

The lewis dot structure of BF₃ where all the atoms have a complete octet is shown in the image below.

Although this structure does not exist in reality. The actual structure of BF₃ has boron bound to all the three fluorine atoms via single bonds, this leaves the boron with an incomplete octet. So, BF₃ is actually an exception to the octet rule.

To calculate the formal charge (FC) of an atom in reference to the structure shown below, use the following formula

\(\rm FC = (no. \ of \ valence \ electrons ) - (non \ bonding \ electrons) - (no. \ of \ bonds)\)

Therefore, the formal charge on the atoms are,

\(\rm FC \ on \ B = (3)- (0) - (4) = -1\\\\FC \ on \ F \ with \ two \ bonds = (7)- (4) - (2) = +1\\\\FC \ on \ F \ with \ one \ bond = (7)- (6) - (1) = 0\)

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Answer:

The chemical equilibrium of the system will be unaffected. The chemical equilibrium of the system will shift to the right to favor the forward reaction. The chemical equilibrium of the system will shift to the left to favor the reverse reaction. (I hope this helped!!)

ANSWER

option A and B

EXPLANATION

An increase in temperature will increase the average kinetic energy of the molecule, thereby increasing the frequency of collision.

The correct answer are option A and B

Answer:

The fraction of the volume of the atom that is taken up by the nucleus is 4.6656\times 10^{-14}4.6656×10

−14

.

The density of a proton is 6.278\times 10^{14} g/cm^36.278×10

14

g/cm

3

.

Explanation:

Diameter of the atom ,d = 2.50 Å

Radius of the atom ,r = 0.5 d=0.5 × 2.50 Å = 1.25Å

Volume of the sphere= \frac{4}{3}\pi r^3

3

4

πr

3

Volume of atom = V

V=\frac{4}{3}\pi r^3V=

3

4

πr

3

..[1]

Diameter of the nucleus ,d' = 9.00\times 10^{-5}\AA9.00×10

−5

A

˚

Radius of the nucleus ,r' = 0.5 d'=0.5\times 9.00\times 10^{-5}\AA=4.5\times 10^{-5}\AA0.5×9.00×10

−5

A

˚

=4.5×10

−5

A

˚

Volume of nucleus = V'

V=\frac{4}{3}\pi r'^3V=

3

4

πr

′3

..[2]

Dividing [2] by [1]

\frac{V'}{V}=\frac{\frac{4}{3}\pi r'^3}{\frac{4}{3}\pi r^3}

V

V

′

=

3

4

πr

3

3

4

πr

′3

=\frac{r'^3}{r^3}=\frac{(4.5\times 10^{-5}\AA)^3}{(1.25 \AA)^3}=

r

3

r

′3

=

(1.25

A

˚

)

3

(4.5×10

−5

A

˚

)

3

\frac{V'}{V}=4.6656\times 10^{-14}

V

V

′

=4.6656×10

−14

The fraction of the volume of the atom that is taken up by the nucleus is 4.6656\times 10^{-14}4.6656×10

−14

.

Diameter of the proton ,d = 1.72\times 10^{-15} m = 1.72\times 10^{-13} cm1.72×10

−15

m=1.72×10

−13

cm

1 m = 100 cm

Radius of the proton,r = 0.5 d=0.5\times 1.72\times 10^{-13} cm=8.6\times 10^{-14} cm0.5×1.72×10

−13

cm=8.6×10

−14

cm

Volume of the sphere= \frac{4}{3}\pi r^3

3

4

πr

3

Volume of atom = V

V=\frac{4}{3}\times 3.14\times (8.6\times 10^{-14} cm)^3=2.664\times 10^{-39}cm^3V=

3

4

×3.14×(8.6×10

−14

cm)

3

=2.664×10

−39

cm

3

Mass of proton, m = 1.0073 amu = 1.0073\times 1.66054\times 10^{-24} g1.0073×1.66054×10

−24

g

1 amu = 1.66054\times 10^{-24} g1amu=1.66054×10

−24

g

Density of the proton : d

d=\frac{m}{V}=\frac{1.0073\times 1.66054\times 10^{-24} g}{2.664\times 10^{-39}cm^3}=6.278\times 10^{14} g/cm^3d=

V

m

=

2.664×10

−39

cm

3

1.0073×1.66054×10

−24

g

=6.278×10

14

g/cm

3

The density of a proton is 6.278\times 10^{14} g/cm^36.278×10

14

g/cm

3

.

Explanation:

set as brainliest

Answer:

it's both cold and hot weather so it could form a tornado

Answer: a substance whis lose hydrogen

Explanation:

Answer:

Color or colour is the visual perceptual property corresponding in humans to the categories called blue, green, red, etc. Color derives from the spectrum of light interacting in the eye with the spectral sensitivities of the light receptors.Explanation:

A mole of M&Ms will occupy approximately 3.82992x10¹⁷ cubic meters of volume.

The volume of one M&M is given as 6.36x10⁻⁷ m³. To find the volume occupied by a mole of M&Ms, we need to know the Avogadro's number, which is approximately 6.022x10²³ mol⁻¹.

The number of M&Ms in a mole can be calculated using Avogadro's number. Therefore, one mole of M&Ms will contain 6.022x10²³ M&Ms.

To find the total volume occupied by a mole of M&Ms, we can multiply the volume of one M&M by the number of M&Ms in a mole.

(6.36x10⁻⁷ m³) * (6.022x10²³ M&Ms) = 3.82992x10¹⁷ m³

Therefore, a mole of M&Ms will occupy approximately 3.82992x10¹⁷ cubic meters of volume.

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The value of the change in temperature when a piece of aluminum is heated from 30.0°C to 50.0°C is 20.0°C

To determine the change in temperature of a piece of aluminum heated from 30.0°C to 50.0°C, you simply need to subtract the initial temperature from the final temperature. In this case:

Change in temperature = Final temperature - Initial temperature
Change in temperature = 50.0°C - 30.0°C
Change in temperature = 20.0°C

Thus, the correct answer is 20.0°C. This change in temperature represents the difference between the starting and ending temperatures, indicating that the aluminum's temperature increased by 20 degrees Celsius during the heating process.

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The number 1.249 633 500 x 10¹⁰, reported to four significant figures, would be written as 1.250 x 10¹⁰.

To understand how to round this number to four significant figures, we need to consider the rules for significant figures.

In scientific notation, the coefficient part (1.249 633 500) determines the number of significant figures. The first non-zero digit and all the digits that follow are significant.

In this case, the first non-zero digit is 1, and all the digits that follow (2, 4, 9, 6, 3, 3, 5, 0, 0) are also significant. Therefore, we have a total of nine significant figures.

To round to four significant figures, we look at the fifth significant figure, which is 6 in this case. Since it is greater than 5, we round up the fourth significant figure (9) by adding 1 to it. This gives us 10.

After rounding, the number becomes 1.250. Since we moved the decimal point one place to the right, the exponent becomes 10¹⁰.

Therefore, 1.249 633 500 x 10¹⁰, reported to four significant figures, is 1.250 x 10¹⁰.

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Answer:

In a solid the attraction between particles are strong enough to hold all the particles together and are able t vibrate about in fixed positions. In liquids, the particles can slip past one another and tumble around.

Explanation:

The reaction between AgNO₃ and NaCl forms AgCl and NaNO₃. The balanced chemical equation for the above reaction is given as:

AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)

The reaction between AgNO₃ and NaCl is both precipitation and double-displacement reaction. The balanced chemical equation is given as:

AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)

                                          (ppt)

In a double displacement reaction the anions are exchanged and the more reactive element displaces the less reactive element. And in a precipitation reaction, a precipitate is formed in the end of the reaction. In this reaction, AgCl is formed as precipitate.

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Commercial agriculture can lead to water-quality problems because water can be used for irrigation and washing chemical products.

The term commercial agriculture makes reference to the techniques to produce high yields in extensive crops.

Commercial agriculture may lead to contamination problems due to the use of herbicides and pesticides.

In conclusion, commercial agriculture can often lead to water-quality problems because water can be used for irrigation and washing chemical products.

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Answer:

The formation of a precipitate

Explanation:

took thecquiz on edge. got it correct

The formation of a precipitate is a evidence that a chemical reaction has likely occurred.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Now lets check all option one by one

Option (A): a liquid slowly losing volume

Here change in volume occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (B): the formation of a precipitate

Here formation of precipitate is a evidence of a chemical reaction.

So it is correct option.

Option (C): boiling water releasing steam

Here formation of evaporation takes places which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (D): a change in the shape of solid.

Here change in shape occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.

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In the 54.3 g of sugar (glucose), C₆H₁₂O₆, you added a total of 1.089 x 10²⁴ oxygen atoms.

To determine the number of oxygen atoms in the given amount of sugar, we need to consider the molecular formula of glucose, which is C₆H₁₂O₆. This formula tells us that there are 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms in one molecule of glucose.

To calculate the number of oxygen atoms in 54.3 g of sugar, we first need to find the molar mass of glucose. The molar mass of glucose can be calculated by summing up the atomic masses of its constituent elements:

Molar mass of glucose (C₆H₁₂O₆) = (6 x atomic mass of carbon) + (12 x atomic mass of hydrogen) + (6 x atomic mass of oxygen)

Using the atomic masses from the periodic table, we find:

Molar mass of glucose = (6 x 12.01 g/mol) + (12 x 1.01 g/mol) + (6 x 16.00 g/mol) = 180.18 g/mol

Now, we can calculate the number of moles of glucose in 54.3 g:

Number of moles of glucose = mass of glucose / molar mass of glucose = 54.3 g / 180.18 g/mol ≈ 0.301 mol

Since the mole ratio between glucose and oxygen in the molecular formula is 1:6, we can determine the number of moles of oxygen:

Number of moles of oxygen = 6 x number of moles of glucose = 6 x 0.301 mol = 1.806 mol

Finally, to calculate the number of oxygen atoms, we multiply the number of moles of oxygen by Avogadro's number:

Number of oxygen atoms = number of moles of oxygen x Avogadro's number = 1.806 mol x 6.022 x 10²³ atoms/mol ≈ 1.089 x 10²⁴ atoms

Therefore, in the 54.3 g of sugar (glucose), you added a total of approximately 1.089 x 10²⁴ oxygen atoms.

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If the temperature increases, then the concentration of sodium hydroxide (NaOH) will decrease because the equilibrium will shift in the backward direction.

Sodium hydroxide is an ionic compound consisting of Na⁺ and OH⁻. It is also called as caustic soda. It is an inorganic compound with chemical formula NaOH.

When NaOH dissolve in water it is exothermic in nature. As the temperature increases, the equilibrium will shift in the backward direction.Therefore,as to nullify the effect of increased temperature. It will decrease the solubility of NaOH in water.

Thus, If the temperature increases, then the concentration of sodium hydroxide (NaOH) will decrease.

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The chemist can conclude that the liquid is gaining heat or experiencing an increase in thermal energy.

Thermal energy in chemistry is the energy transferred from one object to another due to a temperature difference. This type of energy is also known as heat energy and is associated with the motion of molecules within an object. At the molecular level, thermal energy can be seen as the kinetic energy of the molecules which are constantly in motion. When two objects with different temperatures come into contact, heat energy is transferred from the object with the higher temperature to the object with the lower temperature. This process continues until both objects reach thermal equilibrium, meaning that the temperatures of both objects are equal. Thermal energy can also be created by the friction between two objects, or by the combustion of a fuel.

From this observation, the chemist can conclude that the liquid in the vat is undergoing a chemical reaction. To determine the exact nature of the reaction, further analysis would be needed. This could include measuring the rate of temperature increase, the products of the reaction, and the reaction enthalpy.

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It's vapor pressure in a solution made from equal moles of solvent and solute is : b) 50 torr .

Vapor pressure of a solution is dependent on the nature of solute and solvent and their interactions. The vapor pressure of a solution is lower than that of the pure solvent due to the presence of the solute particles interfering with solvent molecules' ability to escape into vapor phase.

Given, pº = 100 torr

p = (1/2) * pº = (1/2) * 100 torr = 50 torr.

So, the vapor pressure of the solution made from equal moles of solvent and solute is 50 torr.

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The correct option is: Methylation of cytosine

Genomic imprinting is primarily regulated by the methylation of cytosine residues in the DNA sequence.

During genomic imprinting, specific genes are marked with methyl groups, which can affect their expression patterns. Methylation of cytosine is an epigenetic modification that can result in the silencing or activation of certain genes, depending on the location and context of the methylation.

This process occurs during early development and is responsible for the differential expression of genes inherited from the mother and father.

Acetylation of histones and cytosine, as well as other histone modifications, can also contribute to gene regulation but are not primarily responsible for genomic imprinting.

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