Convert 380 mmHg to atm.

Rubidium sulfide( Rb2S)

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To avoid making the reaction mix become an emulsion. - The reaction was stirred at a moderate, not rapid, pace.To deprotonate alcohols to become good alkoxide nucleophiles. - Solid sodium hydroxide was added to 2-naphthol.Keep the time for the reaction to go to completion under an hour. - Allyl bromide was used in excess.

Separate the non-polar ether product from the polar by-products. - The contents of the reaction flask were passed through a column of silica.Remove dissolved water from the reaction mixture. - Enough calcium chloride to cover half the bottom of the flask was added.An emulsion is a suspension of a liquid in another liquid. Because it is tough to separate these, stirring slowly in the course of the reaction prevents the reaction mix from becoming an emulsion.

A good nucleophile is an ion or a molecule that has an unbonded electron pair that may be employed to form a chemical bond to an electrophile. Alcohols may be deprotonated to form alkoxide nucleophiles by adding solid sodium hydroxide.The time for the reaction to be complete should be kept to a minimum. Allyl bromide was used in excess to achieve this.Silica gel is used in column chromatography to separate compounds based on their polarity.The polar by-products are eliminated by passing the contents of the reaction flask through a column of silica.The reaction mixture's water was removed by adding calcium chloride, which is hygroscopic.

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The number of liters occupied by one mole of gas at room temperature will be 25.45 L

Yes, the number of molecules contained in the 30 ml of air will be 7.59 × 10²³.

At standard temperature and pressure the values are as;

Volume of gas (V1) =  22.4 L

Pressure = 1.00 atm

Temperature (T1) = 273.15 K

Final temperature (T2) = 25 °C or 298.15 K

number of moles (n) = 1

Pressure = constant

To find out the final volume (V2) we will use Charles's law

   V1 / T1 = V2 / T2

Rearrange it for V2

   V2 = (V1 × T2) / T1

Put the values in the above equation

     V2 = (22.4 L × 298.15 K) / 273.15 K

     V2 = 6678.56 L /  273.15

     V2 = 24.45 L

Calculate the no. of molecules by using the ideal gas law

  PV = nRT

   n = PV / RT

Value of P in chart = 104.2 × 10³

   n = (104.2 × 10³) × (30 × 10⁻³) / 8.314 × 298

    n = 1.262 mol

Number of molecules = 1.262 (6.02 × 10²³)

Number of molecules = 7.59 × 10²³

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Electrons are being shared between nitrogen and hydrogen is the correct statement. Hence option D is correct.

A sort of chemical link known as a covalent bond is created when two atoms share electrons. The electrons that both atoms share are held in a stable balance by a force exerted by both atoms in a covalent link.

Although there are some exceptions, covalent bonds, which are the not as strong as the ionic bonds, are typically created between nonmetal atoms. The ionic bonds are quite stronger than they are.

New bonds for ammonia are created as a result of the reaction between two nitrogen molecules and one hydrogen molecule. Heat energy is released to the environment during this process. This reaction is exothermic as a result.

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The complete question is

The reaction between Hydrogen and Nitrogen is illustrated in the image. Which

statement about this reaction is correct?

N₂ + 3H₂ → 2NH₂

a) The nucleus of nitrogen is being split to be able to form bonds with hydrogen.

b) The nucleus of nitrogen is being fused with hydrogen to form a new compound.

c) Protons are being transferred between nitrogen and hydrogen.

d) Electrons are being shared between nitrogen and hydrogen.

Answer: 174658.25772 grams

The statement "Isotopes with an even number of both protons and neutrons are generally stable" is TRUE.

Isotopes with an even number of protons and neutrons are known as isotopes. A single element can have a different number of neutrons; such elements are known as isotopes. A nucleus containing a different number of neutrons will have a different mass number than the element's standard atomic number since the mass number is equal to the number of neutrons plus the number of protons in the nucleus.

There are 275 isotopes recognized for 81 stable elements, while there are 50 isotopes for elements that are radioactive and occur naturally.

Isotopes with an even number of both protons and neutrons tend to be more stable, as the strong nuclear force and the electromagnetic force in a nucleus cancel out, causing a more stable nucleus. The vast majority of stable elements have a nearly equal number of neutrons and protons, though there are some exceptions, such as beryllium-8 and helium-3.

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Answer:

A metallic bond.

Explanation:

Potassium is a metal (alkali metal), hence its bonds are metallic bonds.

Hope this helped!

Answer:

metallic bond............

The anhydrous magnesium sulfate required to dry a di-ethyl ether solution after performing extractions involving water is enough such that some powder remains free flowing in solution with swirling without clumping.

Extraction is a process which involves transfer of a solute from one phase to another. A cup of tea or coffee prepared represents a process of extraction.The flavor and odor components are extracted from the dried material into the water.

Anhydrous magnesium sulphate works as a drying agent. Magnesium sulfate (MgSO₄) works by forming complex with H₂O in the solvent. It forms a hydrated MgSO₄ precipitate. This precipitate is then filtered out by gravity, which yields an anhydrous product. Due to the high affinity towards water molecules, MgSO₄ removes any amount of water from the extracts.

Due to the presence of an active hydrogen atom, ethyl alcohol reacts with magnesium metal. Diethyl ether, does not have any replaceable hydrogen atom. So, it does not react with magnesium sulfate, therefore, can be dried by anhydrous magnesium sulfate.

Complete question is -

How much anhydrous magnesium sulfate is required to dry a diethyl ether solution after preforming extractions involving water?

Select answer and submit.

a. Enough to cover the tip of your scoopula once

b. 1 g/mL of diethyl ether

c. Enough such that some powder remains free flowing in solution with        

   swirling without clumping

d. Anhydrous magnesium sulfate doesn't dry diethyl ether

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Answer:

Magnesium ribbon

Explanation:

The mole of a substance is a quantity  that contains the Avogadro's number of particles.

 This Avogadro's number of particles  = 6.02 x 10²³particles

It is known that 1 mole of any substance contains 6.02 x 10²³particles

So, from the given choices, the object with the highest number of moles will contain the highest amount of particles.

   Magnesium ribbon with 0.871mole will contain the highest number of particles;

   Number of particles  = 0.871 x 6.02 x 10²³particles  = 5.24 x 10²³particles

The missing variable of (⁻¹) is bromine.

Let the missing variable be X.

No. of electrons in the monoatomic anion (X⁻¹ )= 36

No. of electrons in the monoatomic atom (X) = 35

Atomic No. = No. of protons = No. of electrons in neutral atom = 35

Mass No. = No. of protons + No. of neutrons

               = 35 + 45 = 80

Hence, the element must be Br as its mass no is 80 and atomic no is 35.

And the ion is bromide ion or Br⁻¹ ion. It is an anion which gains an electron to achieve octet.

X → Br and X⁻¹ → Br⁻¹

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5/16 = 0.313

\(\sqrt{1/16}\) = 0.25

0.38(10) = 3.8

\(\sqrt{0.09}\) = 0.3

Answer:

9 moles of N2

Explanation:

Well first you balance the equation which would be N2+3 H2>2 NH3. But you need 18 miles of NH3 so you would just replace the 2 moles of NH3 with 18 and balance the rest of the equation from there. And you would get 9 N2 + 27 H2>18 NH3

Answer:

600 grams

Explanation:

The value of the mole is equal to the number of atoms in exactly 12 grams

12x50=600

Same thing, but upside down

Answer:

Drain cleaner pH =12.10 Basic

Hand soap pH = 9.4 Basic

Blood pH =7.35 Basic

spit pH =6.5 acidic

water pH 7.0 neutral

milk pH 6.6 acidic

chicken soup 6.8 acidic

cofee ph 4.9 acidic

orange juice pH 3.5 acidic

soda pop ph 2.5 acidic

vomit 1.2 acidic

battery acide 1.0 highly acidic

Specific heat is used to explain why different substances changes the temperature at different rate.

Temperature is a physical quantity which is expressed as quantitatively the perceptions of the coldness and hotness. Temperature is measured with a thermometer.

It is defined as the amount of heat which is used to require to increase the temperature by 1°C.

The SI unit thorough which it is measured is J/ g/ °C.

Let's take an example of specific heat of water which is 4.184J/ g/ °C.

Therefore, specific heat is used to explain why different substances changes the temperature at different rate.

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Answer:True

Explanation:

Answer:

For example, water in a state of solid is ice where water is frozen under cold temperatures (i.e. below room temperature of a liquid). Water in a state of liquid is just water (in this state at room temperature, for example). Water in a state of gas can be water vapour as it's the gaseous phase of the water

Can i get a brainilest point pls...

Answer:

Solid, Liquid, and Gas

Explanation:

The three forms of water is a solid, like ice. Liquid like water and water vapor which is a gas.

Answer: i think it is 144.16

Explanation:

Answer:

ooh sorry, but will this help you now:

Ocean dynamics define and describe the motion of water within the oceans. Ocean temperature and motion fields can be separated into three distinct layers: mixed (surface) layer, upper ocean (above the thermocline), and deep ocean. Ocean currents are measured in sverdrup (sv), where 1 sv is equivalent to a volume flow rate of 1,000,000 m (35,000,000 cu ft) per second.

Surface currents, which make up only 8% of all water in the ocean, are generally restricted to the upper 4…

Explanation:

Hope this helps :)

Calcium metal with chromium(III) chloride would react. Calcium metal is more reactive than chromium metal; therefore, putting calcium metal in chromium chloride would create a reaction, where as putting chromium metal in calcium chloride would not form any reaction.

The acid mostly dissociates when dissolves in water.

option C.

A strong acid is an acid that is completely dissociated in an aqueous solution such as water when it is dissolved in it.  Strong acid is a chemical species with a high capacity to lose a proton, H+.

In other words, a strong acid is one which is virtually 100% ionized in solution.

Thus, when a compound is described as a strong acid it means that: the acid mostly dissociates when dissolves in water.

So option C is the correct answer as it explains the meaning of a strong acid.

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Answer:  \(P_4O_{10}\) is the limiting reagent

66.6 g of \(H_3PO_4\) will be formed.

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)  \(\text{Moles of} P_4O_{10}=\frac{40g}{284g/mol}=0.14moles\)

\(\text{Moles of} H_2O=\frac{30g}{18g/mol}=1.7moles\)

\(P_4O_{10}+6H_2O\rightarrow 4H_3PO_4\)  

According to stoichiometry :

1 mole of \(P_4O_{10}\) require 6 moles of \(H_2O\)

Thus 0.14 moles of \(P_4O_{10}\) will require=\(\frac{6}{1}\times 0.14=0.84moles\)  of \(H_2O\)

Thus \(P_4O_{10}\) is the limiting reagent as it limits the formation of product and \(H_2O\) is the excess reagent.

As 1 mole of \(P_4O_{10}\) give = 4 moles of \(H_3PO_4\)

Thus 0.17 moles of \(P_4O_{10}\) give =\(\frac{4}{1}\times 0.17=0.68moles\)  of \(H_3PO_4\)

Mass of \(H_3PO_4=moles\times {\text {Molar mass}}=0.68moles\times 98g/mol=66.6g\)

Thus 66.6 g of \(H_3PO_4\) will be formed.

Answer:

B

Explanation:

p block bc its last orbit is 4p5

Answer:

Explanation:

P. block

One way in which God showed precision in his creation was his mighty love on the he has on his creation

The book of John made us to know that: For God do love the world that he gave his only begotten son that whosoever believeth in him shall not perish but have everlasting life.

Creations is the art of producing or making something out of something

So therefore, one way in which God showed precision in his creation was his mighty love on the he has on his creation

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Answer:

2

Explanation:

not 100%sure hehe

The compound calcium chloride with the formula CaCl₂ has two elements namely, calcium and chlorine. Hence, option b is correct, the compound is made of 2 elements.

A compound is a chemical substance which is made by the combination of atoms of two or more elements. The bonding type of this elements differ from compound to compound.

Calcium chloride is an ionic compound formed by the electron transfer from calcium to chlorine. The two electrons of the valence shell of Ca is donated to each chlorine atoms.

The number of elements in this compound is thus 2, which are calcium and chlorine. There are three atoms in one calcium chloride molecule. One of calcium and two atoms of chlorine. Hence, option b is correct.

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You've probably seen puddles of water that eventually vanish. The puddle's water turned into a gas.

When a substance transforms from a liquid to a gas, it evaporates. Water vapor is the name for water in the gaseous state. The particles gather kinetic energy and accelerate as the temperature rises. Gases, liquids, and solids are the three basic phases (or states) of matter. The least dense of the three, highly compressible, and able to fill any container entirely, gases have the lowest density of the three. A material changes physically when its state changes. They don't involve any alterations to the matter's chemical composition and are reversible. The status frequently varies due to melting, freezing,vaporization, condensation, deposition, and sublimation. For instance, ice changes from a solid (ice) state to a liquid form when heated gradually (water). When heated, water can transform from a liquid (water) to a gas (steam).

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The balanced equation for the combustion of butane with the smallest whole numbers possible is:

2C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Note that this equation is balanced because there are an equal number of atoms of each element on both sides of the equation.

The balanced equation for the combustion of butane with the smallest whole numbers possible is:

C4H10 + 13/2 O2 → 4 CO2 + 5 H2O.

However, since we need whole numbers, we can multiply the entire equation by 2 to achieve this:

2(C4H10) + 13(O2) → 8(CO2) + 10(H2O)

So, the final balanced equation with whole numbers is:

2C4H10 + 13O2 → 8CO2 + 10H2O

The equation shows that when two molecules of butane (C4H10) react with 13 molecules of oxygen (O2), they produce eight molecules of carbon dioxide (CO2) and 10 molecules of water (H2O).

The coefficients in front of each compound represent the number of molecules involved in the reaction.

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Answer:

C.

Explanation:

For a reaction to be spontaneous, the change in enthalpy (ΔH) should be negative (exothermic), and the change in entropy (ΔS) should be positive (increase in disorder). The Gibbs free energy (ΔG) can be used to determine the spontaneity, where a negative value of ΔG indicates a spontaneous reaction.

The change in enthalpy (ΔH) and change in entropy (ΔS) values provide important information about the spontaneity of a reaction. For a reaction to be spontaneous, it should have a negative ΔH (exothermic) and a positive ΔS (increase in disorder).

1. If ΔH is negative, it means that the reaction releases energy in the form of heat. This is favorable for a spontaneous reaction because it indicates that the products are more stable than the reactants.

2. If ΔS is positive, it implies an increase in the randomness or disorder of the system. This increase in entropy favors the spontaneity of a reaction since nature tends to move towards higher entropy states.

3. To determine whether a reaction is spontaneous, we can use Gibbs free energy (ΔG). The relationship between ΔH, ΔS, and ΔG is given by the equation: ΔG = ΔH - TΔS, where T represents temperature. If ΔG is negative, the reaction is spontaneous.

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Answer:

Explanation:

Water vapor is when water molecules are present in the air, while steam is water heated to the point that it turns into gas. In simplified science, both are referred to as the gaseous state of water. Steam is usually white or translucent in nature, while water vapor can be clear or translucent.

Steam is simply, water vapor. Hence, the key difference between steam and vapor is that steam is the gaseous state of water whereas vapor is the gaseous state of any substance. Moreover, steam is typically invisible while the vapor of some substances is colorful.