Which graph shows the pressure-temperature relationship for a gas at a fixed volume?
A. Graph D
B. Graph B
C. Graph A
D. Graph C​

Answer:

a. H and P

Explanation:

A covalent bond is formed between 2 nonmetals, which share pairs of electrons to complete the octet in their valence shells. The polarity of the bond depends on the difference in electronegativity between both atoms. If ΔEN = 0, the bond is nonpolar. If ΔEN > 0, the bond is polar.

Which of the following set of atoms has a nonpolar covalent bond?

a. H and P . YES. H and P are nonmetals and ΔEN = |EN(H)-EN(P)|=|2.1-2.1|=0.

b. N and C . NO. ΔEN = |EN(N)-EN(C)|=|3.0-2.5|=0.5.

c. Li and O. NO. Li is a metal and O is a nonmetal.

d. Cl and Ca. Ca is a metal and Cl is a nonmetal.

Answer:

b. electronegativity

Explanation:

The ability of an atom in a molecule to attract electrons is best quantified by the _Electronegativity_.

Electronegativity is the ability of an atom to attract a shared pair of electron which is loosely held. Polar molecules often possess such properties. The Halogen group (group 17) is famous for such property because it has the highest electronegativity in periodic table.  

Answer:

See explanation and image attached

Explanation:

The addition of a halohydrin to an alkene proceeds via the bromium cyclic intermediate.

The bromine dissociates heterolytically and attacks the (E)-2-hexene yielding the brominuim ion intermediate. This is now attacked by water with a consequent loss of H^+ to yield the final product.

Since the reaction involves a flat and planar carbocation intermediate, racemization is possible, thereby leading to the two stereoisomers shown in the image attached to this answer.

Answer:

answer is c or fuel

Explanation:

Answer:

Scientists define temperature with certain rules like the measure of the ability of a substance, or more generally of any physical system, to transfer heat energy to another physical system. The temperature of a substance is closely related to the average kinetic energy of its molecules.

Explanation:

Scientists define temperature as a measure of the average kinetic energy of the particles in a substance. In simpler terms, it reflects how fast the particles are moving within a material.

When an object is heated, its particles gain kinetic energy, leading to an increase in temperature. On the other hand, cooling reduces the average kinetic energy and results in a decrease in temperature.

Temperature is typically measured using various scales, such as Celsius, Fahrenheit, and Kelvin. Kelvin is the most commonly used scale in scientific applications since it is an absolute temperature scale, starting from absolute zero, where particles have minimal kinetic energy.

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Answer:

hola comoe stas

Explanation:

gracias x los puntos

Answer:The sun's enormous heat rips electrons off the hydrogen and helium molecules that make up the sun. ... Thomas Jefferson National Accelerator Facility

Explanation:

Answer: 568g/mol

Explanation:

It should be noted that there are 40 atoms of carbon in lycopene.

Since mass of 1 carbon = 12g/mol

Mass of 40 carbon atoms = 40 × 12g/mol = 480g/mol

Let the molar mass of lycopene be represented by x.

Therefore the molar mass of carbon = x × mass percent of carbon in lycopene

x × 84.49% = 480g/mol

x × 0.8449 = 480g/mol

x = 480/0.8449

x = 568g/mol

The molar mass of lycopene is 568g/mol

Answer:

This question is incomplete but the completed question is in the attachment below. And the correct is b

Explanation:

Specific heat capacity can be defined as the amount of heat required to raise to raise 1 kg of a substance by 1 kelvin. Thus, this means that when the specific heat capacity of a substance is high, it takes more energy to increase the temperature of that substance. This also means that when different substances are subjected to the same amount of heat, the substance with the higher specific heat capacity will absorb less heat; for example at a beach, water has a very high specific heat capacity, thus when the sand in the beach is hot, the beach water is still relatively cold.

From the description above, it can be seen that the metal with the least specific capacity will absorb the greatest amount of heat, thus the metal is lead with the specific heat capacity of 0.129 J/(g. °C).

Answer

Cu I ( valance number of copper is 2 and valance number of iodide is 1)

so CuI2 so the answer is B.

Answer:

B

Explanation:

Answer:

B.

radiant ---> thermal

Explanation:

Answer:

1 = oxidation

2 = reduction

Explanation:

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

2I- ----> I₂+ 2e⁻

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

F + e⁻ ----> F⁻

Consider the following reactions.

4KI + 2CuCl₂  →   2CuI  + I₂  + 4KCl

the oxidation state of copper is changed from +2 to +1 so copper get reduced.

CO + H₂O   →  CO₂ + H₂

the oxidation state of carbon is +2 on reactant  side and on product side it becomes  +4 so carbon get oxidized.

Na₂CO₃ + H₃PO₄  →  Na₂HPO₄ + CO₂ + H₂O

The oxidation state of carbon on reactant side is +4. while on product side is  also +4 so it neither oxidized nor reduced.

H₂S + 2NaOH → Na₂S + 2H₂O

The oxidation sate of sulfur is -2 on reactant side and in product side it is also -2 so it neither oxidized nor reduced.

Answer:

H2 to O2

H2 to H2O

H20 to O2

H2O to H2

O2 to H20

O2 to H2

Explanation:

Answer:

crest

Explanation:

One mole of an atom of a substance is equal to the  gram molecular mass of the element. Therefore, the correct option is option B among all the given options.

A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. The levels at which chemical reactions frequently occur exclude the use of grams, yet utilizing actual numbers of atoms, molecules, or ions would also be unclear.

A mole consists of precisely 6.022140761023 particles. The "particles" might be anything, from tiny things like electrons and atoms to enormous things like stars or elephants. One mole of an atom of a substance is equal to the  gram molecular mass of the element.

Therefore, the correct option is option B among all the given options.

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Answer: 500ml

Explanation:

Using the Dilution formula that

C₁V₁=C₂V₂

Where

C₁=the molarity of  concentrated solution

= 12 M

V₁ = Volume of the concentrated solution

=?

C₂=the molarity of  the diluted solution

=3.0M

V₂= Volume of the diluted  solution= 2 liters

Changing 2 liters to millilitres  

1000ml= 1 Liters

2Liters=2000ml

Bringing the formulae and inputting the given values

C₁V₁=C₂V₂

12 x V₁= 3.0 x 2000ml

V₁= 3.0 x 2000 / 12

V₁=500ml

Therefore 500ml of 12-molar HCl mst be diluted to obtain 2 Liters of 3.0 Molar HCl.

Answer:

207g

Explanation:

207.2 to be more specific

The given question is incomplete. The complete question is:

Atom a and atom b have the same number of protons and neutrons but they do not have the same number of electrons. What statement describes the atoms?

The atoms have the same chemical symbol.

The atoms have the same charge.

The atoms have different atomic numbers.

The atoms have different atomic masses.

Answer:  The atoms have the same chemical symbol.

Explanation:

Atomic number is equal to the number of protons for any neutral or charged specie and is specific to a particular element.  Thus two elements having same atomic number will have same chemical symbols.

Mass number is the sum of number of protons and the number of neutrons.

As atoms a nd b have same protons and neutrons , they will have same atomic number and same mass number. But as the number of electrons are different , the charge on them will be different.

Thus the correct statement is the atoms have the same chemical symbol.

Answer:

They have the same chemical symbol

Explanation:

Answer:

si

Explanation:

Answer:

Argon

Explanation:

-Ionization energy is the energy that is required to remove an electron.

-Ionization energy increases as you go from left to right the periodic table and decreases as you go from top to bottom of the periodic table.

-The reason why argon has greater ionization energy is because it is very hard to remove as argon is a noble gases. We know noble gases are inactive because they are already stable. If you're stable, you are less likely to gain or lose electron.

Answer:

[tex]$\lambda_D =964 \ nm$[/tex]

Explanation:

We know, the double layer length of pure water is given by :

[tex]$\lambda _{D}= \left(\frac{\epsilon k_B T}{2e^2z^2N_AC_i}\right)^{1/2}$[/tex]

[tex]$\lambda _{D}= \left(\frac{(78.3)\times(8.85 \times 10^{-21})\times (1.38 \times 10^{-23})\times 300}{2 \times(1.6 \times 10^{19})^2 \times 1^2 \times (6.023 \times 10^{23})\times (10^{-7}) \times 1000 }\right)^{1/2}$[/tex]

Since, pH = -log [tex]$H^+$[/tex]

          [tex]$[H^+]=10^{-7}$[/tex]

[tex]$\lambda_D = \left(93.05 \times 10^_{-14}\right)^{1/2}$[/tex]

[tex]$\lambda_D = \sqrt{93.05} \times 10^{-7}$[/tex]

[tex]$\lambda_D =9.64 \times 10^{-7}$[/tex]

[tex]$\lambda_D =964 \times 10^{-9} \ m$[/tex]

[tex]$\lambda_D =964 \ nm$[/tex]

Mass : 846.268 g

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

[tex]\tt mol=\dfrac{mass}{MW}[/tex]  

mass of Al₂O₃ :

MW 101,96 g/mol

mass=mole x MW

[tex]\tt 8.3\times 101.96=846.268~g[/tex]

Answer:

period 6

Explanation:

If the lanthanides were inserted into the periodic table, they would go into periodic 6.

Their atomic number is between 57 - 71 from element lanthanum to lutetium.

The elements that makes up the series are:

Lanthanum

Cerium

Praseodymium

Neodymium

Promethium

Samarium

Europium

Gadolinium

Terbium

Dysprosium

Holmium

Erbium

Thulium

Ytterbium

Lutetium

Answer:

x=51.66

Explanation:

1 ml = 1 gram

(mass) (Δt) (Cp) = (mass) (Δt) (Cp)

Substituting values into the above, we then have:

(25)(25-x)(4.184)=(50)(x-65)(4.18)

Solve for x

x= 51.6667

The final temperature is "51.67°C".

According to the question,

At 65°C,

= [tex]\frac{50}{50+25}[/tex]

= [tex]\frac{50}{75}[/tex]

= [tex]0.66667[/tex]

At 25°C,

= [tex]\frac{25}{50+25}[/tex]

= [tex]\frac{25}{75}[/tex]

= [tex]0.33333[/tex]

By multiplying the volume fractions, we get

→ [tex]65^{\circ} C\times 0.66667[/tex] = [tex]43.3334^{\circ}C[/tex]

→ [tex]25^{\circ} C\times 0.33333[/tex] = [tex]8.3333325^{\circ} C[/tex]

hence,

The final temperature will be:

= [tex]43.33334+8.333325[/tex]

= [tex]51.6666^{\circ}C[/tex]

or,

= [tex]51.67^{\circ} C[/tex]

Thus the above answer is right.

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Answer:

An Aqueous solution is used to reference any solution where water acts as the solvent. A lot of substances can dissolve in water including acids and bases and when they do this they become aqueous solutions.

Aqueous solutions are denoted by the symbol (aq) in solutions as shown in this reaction below where Sodium Chloride is dissolved in water;

NaCl(s) → Na+(aq) + Cl-(aq)

Aqueous solutions are capable of conducting electricity if electrolytes are the ones dissolved in the water.

There are however some substances that cannot form aqueous solutions because they cannot dissolve well in water for example, organic substances like oils.

Answer:

A single compound is produced in a synthesis reaction.

Explanation:

What are chemical reactions?

Chemical reactions are when two or more reactants chemically react with one another to create one or more substances as products. There are five types: synthesis, decomposition, single-replacement, double-replacement, and combustion.

Types of Reactions and Examples of Each

A synthesis reaction takes two or more reactants and reacts chemically to turn them all into one substance.

A decomposition reaction takes one reactant and breaks itself into two or more products.

A single-replacement reaction takes place when two compounds chemically combine but one of the elements bonds with a different element.

A double-replacement reaction works in the same way as a single-replacement reaction - however, instead of one replacement, there are two replacements.

A combustion reaction is the introduction of heat or energy and oxygen to decompose reactants into carbon dioxide and water.

Therefore, based on the above information, we can determine that a single compound, or option B, is the product of a synthesis reaction.

Answer:

single compound

Explanation:

A synthesis reaction will take more than two reactants. It will chemically mix together and then it forms a synthesis reaction. The elements involved are single compounds.

Our answer is single compounds.

The volume of the liquid = 8.7 ml

Graduated cylinder is a laboratory tool used to measure the volume of liquid

Also called a measuring cylinder

Each line (marked line) on this cylinder shows a scale that shows the total volume of water.

The reading is based on a curve of the fluid formed called the meniscus. Read the measurement of the amount of fluid at the bottom of the meniscus (the position of our eyes is parallel to the level of the meniscus and the cylinder is located in a flat (not tilted) place

If we look at the picture (attached), the meniscus is located between the scale / line 8.6 and 8.8(interval 0.2 ml), so the volume of the liquid shows the number 8.7 ml

C.  the square root of the mass of the particles.

Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or  

the effusion rates of two gases = the square root of the inverse of their molar masses:  

[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]

or  

[tex]\rm M_1\times r_1^2=M_2\times r_2^2[/tex]

From this equation shows that the greater the mass of the gas, the smaller the effusion rate of the gas and vice versa, the smaller the mass of the gas, the greater the effusion velocity.

So if both gases are at the same temperature and pressure, the above formula can apply

Explanation:

Molten sodium chloride is able to conduct electricity due to the presence of free mobile ions in solution or the molten state.

The free mobile ions are the carriers of electricity.