7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO

The continents of today contain remnants of their distant history. The presence of glaciers, fossils, and complementing coasts provides evidence of how the plates originally interacted. Plants and animals used to exist, and fossils when and where they did.

Any surviving remnants, impression, or evidence of a once-living creature from a previous geological epoch is referred to as a fossil. Examples include fossilized bones, shells, exoskeletons, animal or microbe impressions in stone, amber-preserved artifacts, hair, petrified wood, oil, coal, and DNA traces.

There are four basic categories of fossils, each generated in a unique method and useful for conserving various kinds of animals. These include true form fossils, mold fossils, cast fossils, and trace fossils.

In river valleys, cliffs, hillsides, and man-made exposures like quarries and road cuts, sedimentary rocks of the appropriate age are exposed, and these are the places where fossils are most commonly found.

Thus,  Plants and animals used to exist, and fossils when and where they did.

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Matter is said to be made up of particles that are constantly moving. All particles have energy, but the energy has a variation depending on the temperature the sample of matter is in.

The kinetic energy of an object is the energy that it possesses due to its motion and is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

All particles have energy and  in turn the phenomena determines whether the substance exists in the solid, liquid, or gaseous state. Molecules in the solid phase have the least amount of energy, while gas particles have the greatest amount of energy.

The temperature of a substance is a measure of the average kinetic energy of the particles.

With respect to the changes in particle motion, temperature, and kinetic energy when liquid chocolate is poured into a mold, we can say that a change in phase may occur when the energy of the particles is changed.

There are spaces between particles of matter of the chocolate. The average amount of empty space between the molecules gets progressively larger as the sample of matter moves from the solid to the liquid and gas phases. There are attractive forces between the chocolate molecules, and these become stronger as the particles move closer together.

In conclusion, the attractive forces are called intermolecular forces.

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Answer:

a. The electron is a standing wave that can only have an integer number of wavelengths.

Explanation:

As per quantum physics, the theory of wave-particle duality refers to the notion that matter and light show the characteristics of both waves and particles, based on the case of the experiment. Much like light, the matter appeared to possess both wave and particle properties.  Large objects display very low wavelengths, but for small particles, the wavelength may be detected and important, as shown by a double-slit experiment with electrons.

Particles rearranging into new combinations and forming new substances is a chemical change.

This is because in a chemical change, the bonds between atoms or molecules are broken and new bonds are formed to create a different substance with unique properties. This process usually involves the release or absorption of energy in the form of heat, light, or sound.

On the other hand, a physical change involves a change in the physical appearance or state of matter of a substance without changing its chemical identity. Examples of physical changes include melting, freezing, boiling, and changes in size, shape, or color.

In the case of particles rearranging into new combinations and forming new substances, the resulting substance has different chemical properties than the original substance. For example, if you burn a piece of paper, the paper undergoes a chemical change as it is transformed into ash, which has different properties than the paper. This is why it is important to understand the difference between physical and chemical changes in science and everyday life.

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Answer:

Area A has a lot more annual rainfall than area B.

Explanation:

If area A has more than 10 in. rain, and area B has less than 1 in. annual, then area A will obviously get more rainfall. Hope this helps!

Answer:

Different biomes

Explanation:

A double bond connecting a carbonyl carbon and an oxygenyl carbon forms a carbonyl group.

A carbon atom is double-bonded to an oxygen atom to form the chemically organic functional group known as a carbonyl group. [C=O] Aldehydes and ketones are the most basic carbonyl groups, and they are typically joined to another carbon molecule. Many aromatic compounds have these structures, which contribute to flavor and fragrance. A functional group called the carbonyl group has a carbon atom double-bonded to an oxygen atom, or C=O. Another meaning of the word "carbonyl" is a metal-bound, neutral carbon monoxide ligand. Tetracarbonyl nickel, or Ni(CO)4, is one illustration. A double bond connecting a carbonyl carbon and an oxygenyl carbon forms a carbonyl group. Two of the carbonyl oxygen's six valence electrons are shared with the carbonyl carbon atom. Two sets of electron lone pairs make up the remaining four valence electrons.

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Answer:

65.0 K

Explanation:

To find the temperature, you need to use the Ideal Gas Law:

PV = nRT

In this equation,

-----> P = pressure (pKa)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (8.31 L*kPa/mol*K)

-----> T = temperature (K)

You can plug the given values into the equation and simplify to find the temperature.

P = 202.65 pKa                          R = 8.31 L*kPa/mol*K

V = 2.0 L                                     T = ? K

n = 0.75 moles

PV = nRT

(202.65 pKa)(2.0 L) = (0.75 moles)(8.31 L*kPa/mol*K)T

405.3 = (6.2325)T

65.0 K = T

The chlorine and sodium atoms in this configuration form a crystal lattice, a crystal structure made up of powerful ionic bonds.

The symmetrical, three-dimensional structural configuration of points representing atoms, ions, or molecules that make up a crystalline solid is known as the crystal lattice.

It can be characterized as the spatial geometrical arrangement of the atoms, ions, or molecules that make up the crystalline solid.

The cubic lattice of rock salt, NaCl, which has half of its lattice points occupied by sodium atoms and half by chlorine atoms, is one of the most prevalent structures.

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Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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An ionic equation for sodium hydroxide and calcium carbonate is Na⁺ + OH⁻ + Ca²⁺ + CO₃²⁻\(\rightarrow\)Na⁺ +CO₃²⁻ + Ca²⁺ + OH⁻.

Ionic equation is defined as a chemical equation which represents electrolytes in aqueous solutions and are expressed as dissociated ions. Ions present in aqueous solutions are stabilized by ion dipole interactions with the water molecules which are present.

An ionic equation can be written for any electrolyte which dissociates and reacts with the polar solvent. In a balanced ionic equation , number and type of atoms on each sides of reaction arrow are same. Even the net charge on both sides of the arrow is same.

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The change in free energy can help us to discover whether a reaction can be sponteanous or not. The change in free energy fro this reaction is -1.51 kJ/mol.

The change in free energy is referred to as that which determines the spontenity of a chemical reaction. For a spontenous reaction the change in free energy must be negative.

Now;

ΔG = -RTlnK

R = gas constant

T = temperature

K = equilibrium constant

So;

ΔG = -(8.314 * 298 * ln 436)

ΔG = -1.51 kJ/mol

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Answer:

Chloroform.

Explanation:

Given,

Solvent requires 1g of compound per 100 mL

For water,

= 1g/47ml

= 2.1

For Chloroform,

= 1 g/8.1 mL

= 12.345679

For Diethyl ether,

= 1 g/370 mL

= 0.27

For Benzene,

=  1 g/86 mL

= 1.2

Partition coefficients:

Water = -

chloroform = 5.9

Diethyl = .13

Benzene  = .57

The solvent chloroform would be chosen for drawing out the compound out of an aqueous solution as it has the maximum solubility.

The best description of a type C tympanogram is Negative peak pressure, lower than normal compliance.

option C

A type C tympanogram indicates negative pressure in the middle ear, which means that the peak of the tympanogram is shifted to the negative pressure side of the graph.

In addition, the compliance, or the ability of the ear to move in response to sound, is lower than normal. This can be caused by conditions such as Eustachian tube dysfunction or blockage, middle ear effusion, or allergies.

Thus, the best description of a type C tympanogram is Negative peak pressure, lower than normal compliance.

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Answer:

The trachea, also called the windpipe, is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi. At the top of the trachea the cricoid cartilage attaches it to the larynx. The trachea is formed by a number of horseshoe-shaped rings, joined together vertically by ligaments over their substance and by the trachealis muscle at their ends. The epiglottis closes the opening to the larynx during swallowing.

Explanation:

You asked I answered.

Hope this helped! :)

P.S. If you still don't get where the trachea is, look at the graph below. :)

Answer:

Explanation:

The non-polar molecules are held in place by very weak van der Waals forces, hence making it to have the least melting and boiling point.

The melting points of substances is the point at which it changes from solid to liquid, it can be very difficult to ascertain that why mostly the melting point is given as a range of values.

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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Answer:

0.7 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the container

If we assume ideal behavior and constant temperature, we can calculate the final volume of the container using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 0.5 atm × 2.4 L/1.7 atm = 0.7 L

Answer:

The correct answer is C. element

Explanation:

The sample cannot be an element because an element - or elemental substance - cannot be decomposed into simpler substances. Thus, it cannot be composed by differents types of atoms. For example, an element is carbon (C).

As the sample contains three types of atoms, it can be a compound, a molecule or a mixture, because they can be composed by different types of atoms - of different chemical elements. For example, the sample could contain the element carbon (C) combined with other elements, for example oxygen (O) or hydrogen (H), amoing others.

The sample can not be an element due to having only one type of atom.

The sample can be mixture, compound and molecule except element because element is formed from only one type of atoms which can not be broken down into simpler one. The sample contains three types of atoms which means it may be mixture, compound or molecule.

The reason behind this is that mixture, compound and molecule can be made up of three atoms whereas the element can't so we can conclude that sample can not be an element.

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Answer:

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).Aug 14, 2020

Explanation:

Answer:

An atom is made up of the nucleus and the electron shells. The nucleus is made up of positively charged protons and neutral/no charged nuetrons. The electron shells contain the negatively charged electrons, which revolve around the nucleus.

Answer:

(Basic )

Real

These are formed in the front side of the mirror.

Virtual

These are assumed to be formed at the backside of the mirror.

Type of lens used

Converging(real)

Diverging(virtual)

Image reception

Image can be appeared on a screen.(Real)

Image appears to be on the mirror or lens itself.

Interaction of light rays Actual Imaginary(Virtual)

Appearance of image

Inverted(Real)

Erect(Virtual)

Formed by

Concave mirror and convex lens.(Real)

Plane, convex mirror and concave lens.(Virtual)

Example

Image on the theater screen.(Real)

Reflection of any object or body on plane mirror.(Virtual)

Answer:

Na(s) + Cl(g) = NaCl(s)

Explanation:

s means solid

g means gas

Metals are solid at room temperature.

Crystals are solids

The sugars we have been discussing are made directly through a series of reactions in the Calvin Cycle, which uses CO2 as a starting input.

Recall that under thermodynamic laws, building complex molecules requires the input of energy in the form of sunlight. That energy in photosynthesis comes from the Light Reaction. Through a series of reactions in the Light Reaction, light energy is transformed into energy that is in the form of ATP and high-energy electrons carried by NADPH. In the Light Reaction, H2O is used and outputs as O2. In the Calvin Cycle, ATP and NADPH enter and output as ADP and NADP. These processes work together to produce glucose and other sugars that are essential for life. The sugars we have been discussing are made directly through a series of reactions in the Calvin Cycle, which uses CO2 as a starting input.

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The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa

Pressure is defined as the force per unit area. It can be represented using dimensional analysis by considering the fundamental units of force and area. Force is represented by the fundamental unit of mass (kg) multiplied by the fundamental unit of acceleration (m/s²). Therefore, the dimension of force is [kg·m/s²]. Area is represented by the fundamental unit of length (m) squared. Therefore, the dimension of area is [m²]. To determine the dimension of pressure, we divide the dimension of force by the dimension of area: [Pressure] = [Force] / [Area] = [kg·m/s²] / [m²]

Simplifying the expression, we can cancel out the common unit of length:

[Pressure] = [kg/s²·m] The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa Therefore, the dimension of pressure is [kg/s²·m] and its unit is the Pascal (Pa).

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Answer:

option B is the right answer

The average number of internet services in an area of 5.0-kilometer square would be 0.36 internet services..

The average number of people per square mile = 710

1 square mile = 2.59 square kilometer

The average number of people per kilometer square = 710

Number of internet services per person = 0.72

The total number of people that would be in a 5.0-kilometer square = 710 x 5 = 3550 people.

710 people = 0.72 internet services

3550 people = 3550 x 0.72/710

                       = 3.6 internet services

in other words, the average number of internet services per person in an area of 5.0-kilometer square would be 0.36 internet services.

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Answer:

6.2 × 10^-2

Explanation:

Given the reaction:

------------2N2O(g) N2H4(g) <---> 3N2(g) 2H2O(g)

Initial: N2O = 0.1, N2H4 = 0.25-- 0 - - - - - 0

Then: N20 = -2x, N2H4= - x - - - +3x, +2x

Equ : 0.1 - 2x ; 0.25 - x ; +3x ; +2x

At equilibrium :

Add both:

N2O = 0.1 - 2x ;

N2H4 = 0.25 - x;

3N2 = 3x

2H2O = 2x

Moles of N2O at equilibrium = 0.059

Then;

0.1 - 2x = 0.059

-2x = 0.059 - 0.1

-2x = - 0.041

x = 0.041 / 2

x = 0.0205

Moles of N2 present at equilibrium ;

3N2 = 3x

3N2 = 3(0.0205)

= 0.0615

= 0.062 = 6.2 × 10^-2

Answer: mass of chlorine reacted is 3.18 g

Explanation:

2 K + Cl2 = 2KCl

no. of moles of K = mass / molar mass

= 3.50 / 39

= 0.0897

no. of moles of KCl = mass / molar mass

= 6.67 / 74.5

= 0.0895  

no. of moles of Cl2 required = number of moles of KCl / 2

= 0.0895 / 2

= 0.0448 moles  

mass of Cl2 required = no. of moles of Cl2 required x molar mass

= 0.0448 x 71

= 3.1808 g ≈ 3.18 g

Therefore mass of chlorine reacted is 3.18 g