For many purposes we can treat propane as an ideal gas at temperatures above its boiling point of . Suppose the temperature of a sample of propane gas is lowered from to , and at the same time the pressure is decreased by . Does the volume of the sample increase, decrease, or stay the same? increase decrease stays the same If you said the volume increases or decreases, calculate the percentage change in the volume. Round your answer to the nearest percent.

114.5 g is the total mass of the beaker .

Total mass of beaker=53.10g+5.348g+ 56.1g

Total mass=114.5 g

Mass is used in physics to specific inertia, a fundamental function of all remember. basically, it's far a mass of rely's resistance to changing its course or pace in response to the software of a force.

The exchange that an applied force produces is smaller the extra mass a body has. The kilogram, the unit of mass within the international machine of gadgets, corresponds to 6.62607015 1034 joule seconds using Planck's consistent (SI). One joule is produced by way of multiplying one kilogram by means of one rectangular meter per 2d.

The kilogram is decided by genuine measurements of Planck's regular on account that the second one and the meter have formerly been described in phrases of other bodily constants.

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Answer:

can only be determined experimentally.

Explanation:

In the early days of inorganic chemistry, the structure of complex ions remained a mystery hence the name ''complex''.

These ions appear to have structures that defied accurate elucidation. However, by diligent laboratory investigation, Alfred Werner was able to accurately determine the structure of cobalt complexes. As a result of this, he is regarded as a pathfinder in coordination chemistry.

Hence, the structure of complex ions can only be determined experimentally.

Answer:

c. can only be determined experimentally

Explanation:

It is not possible to know for certain the structure of a complex ion on the basis of stoichiometry or by the electrical charges on the components. The structure of the resulting complex ion can only be known by experiment.

Answer:

I know im late but its true

Explanation:

E2020 edge

Answer:

true

Explanation:

Answer:

Bailee is incorrect. The mass of objects stay the same but the weight will change.

Explanation:

Mass is how much space something takes up, so that wouldn't change on the moon. The weight however would change because the gravitational pull on the earth is different from that on the moon.

I hope this helps!

Bailee explained that when traveling to the moon. The statement of Bailee is incorrect. The mass of the objects stays the same, but the weight will change. The correct option is B.

Gravity is a force that pulls all objects towards itself. It is present on the earth and in the galaxy. Gravity is the cause of all planets, and the sun and the moon stay in their own places.

The weight of items on the moon is equal to their weight on Earth, according to Bailee, thus he needs only bring a small amount of luggage. The mass is the quantity of matter. The mass never changes, only the weight changes of an object when they are on different planets.

Thus, the correct option is B. The mass of the objects stays the same, but the weight will change.

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11.) Non polar, equally, Charged.

12.) Ionic, Cation, Positive, anion, negative

13.) electronegative, Polar

14.) So

15. weak, HCl or N2

A covalent bond between C and H is Non Polar. It is called that,because electrons are shared Equally between these two atoms.C and H,are not Charged

12. An Ionic bond is formed when an electron is transferred from one atom to another.

The atom that loses an electron is called Cation and has charge positive. The

atom that gains an electron is called anion and has negative charge.

13. A hydrogen bond is formed between a H in one molecule and an Electronegative atom in

another molecule. The H can make an H-bond only if it is found in a Polar covalent

bond, in its own molecule.

H-bonds give So many of its special properties.

A van der Waals interaction is the Weak type of bond. All molecules form these

bonds. These interactions become important when found in great numbers. The often help the

3D shape of large molecules such as HCL or N2

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The sample of air should be heated to 252 Kelvin (K) to increase its volume by 25%.

It is possible to determine the temperature to which the sample of air should be heated by using the concept of the ideal gas law. PV = nRT is the ideal gas law, and it relates the pressure (P), volume (V), number of moles (n), temperature (T), and gas constant (R). we can focus on the relationship between volume and temperature since the number of moles and pressure are assumed to be constant.

By showing the increase in volume as a percentage (25%), we can make the equation (V+0.25V)/T = V/T, where V represents the initial volume of the air.

On making the equation simple, we find  Tfinal / Tinitial = 1.25.

To solve for Tfianal, the final temperature,

Tfinal = Tinitail / 1.25

On substituting the initial temperature value of 315K into the equation, we will be getting;

Tfinal = 315K / 1.25

Tfinal = 252K

Hence, the sample of air should be heated to 252 Kelvin (K) in order to increase its volume by 25%.

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Answer:

The answer you are looking for would be A

Explanation:

I took the test

Answer:

A.) It is the currently accepted atomic model.

Explanation:

edge 2021

Like charges repel each other, while opposite charges attract each other. This principle is one of the fundamental aspects of electrostatics. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

As the distance between two charged particles decreases, the force between them increases. This is because the closer the particles are, the stronger the electric field they create, leading to a stronger force of interaction.

On the other hand, as the magnitude of the charges decreases, the force between the particles also decreases. This is because the force is directly proportional to the product of the charges. If one or both of the charges are smaller, the force they exert on each other will be weaker.

In summary, according to Coulomb's law, decreasing the distance between charged particles increases the force between them, while decreasing the magnitude of the charges decreases the force. This understanding of the relationship between charge, distance, and force is crucial in explaining the behavior of charged particles and the interactions between them.

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Answer:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

So answer B.

Explanation:

NaOH + HCl = NaCl + H2O

(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams

To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The balanced reaction is

NaOH + HCl = NaCl + H2O

To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH  is required.

mass of  NaOH =Mole× Molar mass of NaOH

mass of NaOH=3.612× 40 g/mol

mass of NaOH=144.48g

Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.

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Answer:

Valency is the measure of the combining power of an element

Taking into account the reaction stoichiometry, a mass of 2.75×10⁻³ grams of carbon dioxide is produced from the complete combustion of 1×10⁻³ grams of methane.

In first place, the balanced reaction is:

CH₄ + 2 O₂  → CO₂ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 16 grams of CH₄ form 44 grams of CO₂, 1×10⁻³ grams of CH₄ form how much mass of CO₂?

mass of CO₂= (1×10⁻³ grams of CH₄× 44 grams of CO₂)÷ 16 grams of CH₄

mass of CO₂= 2.75×10⁻³ grams

Finally, a mass of 2.75×10⁻³ grams of carbon dioxide is produced.

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Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

The volume of a gas at a constant temperature varies inversely with the pressure exerted on it.

Boyle's law states " The pressure of a gas is inversely proportional to the volume occupied by the gas when the temperature(in kelvins) is held constant ".

\(P\) ∝ \(\frac{1}{V}\)

\(PV =CONSTANT\)

This means that with an increase in the volume of gas the pressure exerted by the gas decreases or vice versa. Here variables were pressure and volume.

\(P\) ∝ \(\frac{1}{V}\)

Boyle’s law states that at constant temperature the pressure of a given amount of gas is inversely proportional to the volume of the gas. Hence, option D is correct.

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Answer:

A

Explanation:

195.49 g K x 1 mole / 39.01 g x 6.022 x 10^23 atoms/mole = 30.11 x 10^23 = 3.011 x 10^24

The number of K atoms present in 195.49 grams of K is 3.0110 × 10²⁴ atoms. The correct option is a 3.0110 x 10²⁴.

From the question,

We are to determine the number of K atoms present in 195.49 grams of K.

First, we will determine the number of moles K present

Using the formula,

\(Number\ of\ moles = \frac{Mass}{Atomic\ mass}\)

Atomic mass of K = 39.0983 g/mol

Number of moles of K present = \(\frac{195.49}{39.0983}\)

Number of moles of K present = 4.99996 moles

Number of moles of K present ≅ 5 moles

Now, for the number of atoms present

From the formula

Number of atoms = Number of atoms × Avogadro's constant

Number of K atoms present = 5 × 6.022 × 10²³

Number of K atoms present = 5 × 6.022 × 10²³

Number of K atoms present = 30.11 × 10²³

Number of K atoms present = 3.0110 × 10²⁴ atoms

Hence, the number of K atoms present in 195.49 grams of K is 3.0110 × 10²⁴ atoms. The correct option is a 3.0110 x 10²⁴.

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Answer: 5.13

Explanation: juss do it

Taking into account the definition of calorimetry, the water has absorbed 39,501 J.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the definition of calorimetry:

Q = 4.18 \(\frac{J}{gC}\)× 450 g× 21 C

Solving:

Q= 39,501 J

Finally, the water has absorbed 39,501 J.

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ANSWER : Metallic bonding is a type of chemical bonding that occurs between metal atoms. It involves the sharing of valence electrons between metal atoms, resulting in a sea of electrons that surrounds a lattice of positively charged metal ions.

Two common properties of metals are malleability and conductivity. Malleability refers to the ability of a metal to be shaped into thin sheets without breaking, while conductivity refers to the ability of a metal to conduct electricity and heat.

Metallic bonding produces these properties because the sea of delocalized electrons is free to move throughout the lattice of metal ions. When a force is applied to a metal, the ions in the lattice can slide past each other, facilitated by the movement of these electrons. This ability to move and slide past each other is what gives metals their malleability.

Similarly, the delocalized electrons are able to carry an electric current through the metal lattice. As electrons move through the metal lattice, they collide with the metal ions, transferring energy and producing heat. This transfer of energy is what gives metals their high thermal conductivity. In addition, the delocalized electrons are also able to transfer electrical charge through the metal lattice, resulting in the high electrical conductivity observed in metals.

In summary, metallic bonding produces the properties of malleability and conductivity in metals by creating a sea of delocalized electrons that can move freely throughout the lattice of metal ions, allowing for the movement of ions and the transfer of energy and electrical charge.

Explanation :

there you go home this helps :)

Explanation:

The number of protons is equal to atomic number of an element.

So, Calcium has 20 protons.

Hope it helps :)

The effect of pressure and temperature on the volume of a gas is included by Boyle's law and Charles's law respectively. Boyle's law states that the pressure of a given quantity of gas changes inversely with its volume at constant temperature.

Charles's law projects that the volume of a given amount of gas is seriously proportional to its temperature on the kelvin scale when the pressure is held constant.

In context to the given question we can evaluate the effect of pressure and temperature on volume using Boyle's law and Charles's law .

Let us consider that contain a gas with an initial volume V1, initial pressure P1 and initial temperature T1.

If we gradually increase the pressure to P2 while keeping the temperature constant at T1, then according to Boyle's law, the new volume V2 can be calculated is

V2 = (P1 x V1) / P2

Now,  we increase the temperature to T2 while keeping the pressure constant at P1, hence  Charles's law, the new volume V3 can be evaluated

V3 = (T2 / T1) x V1

Then, we conclude that both pressure and temperature have an effect on volume. Then, it is imperative to note that the effect of pressure is more significant than that of temperature. This is due to according to Boyle's law, pressure and volume are inversely proportional to each other.

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A single bond contains two shared electrons.

There would be 10 moles of cobalt in 6.022 x \(10^{24\) atoms of cobalt.

In order to calculate the number of moles in a given number of particles, we need to divide the number of particles by Avogadro's number.

6.022 x \(10^{24\) atoms of cobalt:

Therefore, there are 10 moles of cobalt in 6.022 x \(10^{24\) atoms of cobalt.

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Answer:

b) The mass of your total product is greater than your total reactants

Explanation:

Mass of reactants is 20 and product is 25 which never occurrs in real

The correct statement, according to the statement about rubidium, is  rubidium has a lower electronegativity and a higher ionization energy than sodium. Correct answer: letter D.

This is because elements in the same group on the periodic table tend to have similar chemical properties.

Elements in the same group have many similar chemical properties. For example, the group 1 elements, known as the alkali elements, have relatively low electronegativity and relatively high ionization energy. This means that alkaline elements are relatively reactive compared to other elements.

Also, elements in the same group have the same electron configuration. This means that elements in the same group have the same number of electrons in their last shell. This explains why elements in the same group have similar chemical properties.

Elements in the same group also have similar physical properties. For example, group 2 elements have a relatively low melting point. This means that the group 2 elements are relatively soft metals. This is a common feature among elements of the same group.

Rubidium is an element located below sodium in group 1 on the periodic table. Which of the following statements is correct?

A) Rubidium has a lower electronegativity and a lower ionization energy than sodium.

B) Rubidium has a higher electronegativity and a lower ionization energy than sodium.

C) Rubidium has a higher electronegativity and a higher ionization energy than sodium.

D) Rubidium has a lower electronegativity and a higher ionization energy than sodium.

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The concentrations  Cu(NH3)42+ at equilibrium is  [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4.

The concentrations  of Cu2+ is [Cu(NH3)42+] + [Cu2+]

The concentrations  of NH3 is 4[Cu(NH3)42+] + 4[NH3]

Equilibrium concentration is described as a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction.

The equilibrium constant expression for the formation of the complex ion Cu(NH3)42+ is:

Kf = [Cu(NH3)42+] / [Cu2+] * [NH3]^4

where [Cu(NH3)42+], [Cu2+], and [NH3] are the molar concentrations at equilibrium.

The initial concentrations of Cu2+ and NH3 are 0.0200 M and 0.300 M respectively.

We have that Kf = 1.70 × 1013, we then  rearrange the equation to solve for [Cu(NH3)42+]:

1.70 × 1013 = [Cu(NH3)42+] / (0.0200M) * (0.300M)^4

[Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4

Therefore at equilibrium, the concentration of Cu(NH3)42+ is [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4

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Answer:

D 4,3,2

Explanation:

4 Co + 3 O2 ----> 2 Co2O3

Answer:

114 grams

Explanation:

3chlorines per compound*38grams=114

When the acidic byproduct of plaque tears away at the teeth's enamel, demineralization of the teeth takes place.

Thus, Mineral molecules like calcium and phosphate give enamel, which is made of minerals, a lot of its strength and hardness.

When a tooth experiences tooth decay, the minerals inside it start to wear away (thus the term "demineralization") and render the tooth's enamel permeable, which can occasionally result in cavities or other dental problems.

Although the definition of bone demineralization may make you nervous, it actually happens naturally throughout the course of a tooth's lifespan.

Thus, When the acidic byproduct of plaque tears away at the teeth's enamel, demineralization of the teeth takes place.

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