How and why does heat affect matter (pls explain thoroughly)

Answer:

B condensation ............

decay rate of approximately 1.69x10^17 Bq (becquerels),

The decay rate of a radioactive sample is determined by the number  of radioactive atoms present and the decay constant, which represents the probability of decay per unit of time.

To calculate the decay rate, we multiply the number of atoms in the sample by the decay constant. In this case, the sample has 8.31x10^17 atoms and a decay constant of 0.203/s. Multiplying these values gives a decay rate of approximately 1.69x10^17 Bq (becquerels), which represents the number of decays per second in the sample.

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Answer: The molar mass of \(BF_3\) is 67.81 g/mol

Explanation:

Molar mass is defined as the mass in grams of 1 mole of a substance.

S.I Unit of Molar mass is gram per mole and it is represented as g/mol.

Atomic Mass of Boron (B) = 10.81 g

Atomic Mass of Flourine (F) = 18.99  g

Molecular mass of  \(BF_3\) = 1 (10.81)+3(18.99) g = 67.81 g

Thus molar mass of \(BF_3\) is 67.81 g/mol

Document properties are user-defined details about a file that describe its content and origin.

They are also called metadata because they are data that describe other data for structure and organization. These details commonly refer to the title, the author or editor's name, the subject, and those keywords that give identity to the document's content.

There are four types of Document Properties, and with the help of Microsoft, we can list them:

-     Standard properties: refer to details such as author, title, and subject

-     Automatically updated properties: these are defined automatically and refer to file system properties, including the file size and dates of creation or modification. Also, involve statistics properties such as the number of characters or words in a file.

-     Custom properties: are additional details that the user can define, like the numeric value o text time.

-     Document library properties: indicate the properties of the document in a public website or folder

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Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.

When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.

This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.

When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.

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The complete question is:

Compare the size of ions to the size of atoms from which they form.

The atomic model which has been used to describe the pressure resulting from the force from the collision of the gas molecules with the walls of their container.

In the container, the molecules of a gas having their own kinetic energy. The molecules move from one place to another as well as in the process, they will collide with the walls of the container. The collision will results in the formation of a momentum by the particle against the wall of the container. The perpendicular force exerted by the gas molecules will be divided by the area, which will describe the pressure.

Thus, the atomic model has been also used to describe the pressure resulting from the force from the collision of gas molecules with the walls of their container.

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The teacher is saying about one of the separation method for hydrocarbons namely, distillation of mixture based on their boiling points.

Distillation is a separation technique by which individual components in a mixture can be separated based on their boiling points. In this technique, the mixture is taken in one flask which is heated to high temperature in arange of boiling point of the components.

The most volatile component boils first which is then passed into the condenser from there it cools down and liquify. The liquified sample is collected into the second flask. In the similar way remaining components can be separated.

Gasoline, kerosene and diesel oil have different boiling points from each other and they will condense at different temperatures. Thus a mixture of these three components can be separated using distillation process.

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Your question is incomplete. But your complete question probably was:

A teacher makes the following statement.

"Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C."

What topic is the teacher most likely talking about?

Expressing the answer in exponential form we get 3⁴.

To simplify the expression (3⁷/(3³), we can apply the properties of exponents. When dividing two exponential expressions with the same base, we subtract the exponents.

In this case, we have 3⁷ divided by 3³, which can be simplified as:

3⁽⁷⁻³⁾

3⁴

Therefore, the simplified expression is 3⁴.

To understand why we subtract the exponents when dividing, we can break down the steps.

The expression 3⁷ represents 3 multiplied by itself seven times:

3 × 3 × 3 × 3 × 3 × 3 × 3.

The expression 3³ represents 3 multiplied by itself three times:

3 × 3 × 3.

When dividing these two expressions, we can cancel out common factors by subtracting the exponents:

(3 × 3 × 3 × 3 × 3 × 3 × 3) / (3 × 3 × 3)

This simplifies to:

3 × 3 × 3 × 3

Which is equivalent to 3⁴.

Thus, the answer in exponential form is 3⁴

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Answer:

13 moles of oxygen

Explanation:

A mole of a substance is the unit of measuring the number of particles within a chemical substance.

The given compound is:

      Ca₅ (PO₄)₃OH

This is a mole of   Ca₅ (PO₄)₃OH

  In this compound we have:

  5 moles of Ca

  3 mole of P

   13 mole of O

   1 mole of H

So,

  In 1 mole of  Ca₅ (PO₄)₃OH, we have 13 moles of oxygen

Answer: 0.224

Explanation: because i added them up

Temperature stays the same during state of matter change. After plotting the graph of temperature vs time and the curve is outlined, the moment the graph plateaus read the temperature that is constant(repeatedly occurs).

From the points given in the table of value, am sure the melting point is 78°C.

All the best!

Answer:

flow of electrons

Explanation:

took the quiz

Answer:

The volume of container is 39.14 L.

Explanation:

Given data:

Number of moles of neon = 4.0 mol

Pressure of gas = 2.5 atm

Temperature of gas = 25°C

Volume of container = ?

Solution:

we will use general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

25+273 = 298 K

Now we will put the values in formula.

2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K ×  298 K

V = 97.86 atm.L /2.5 atm

V = 39.14 L

The volume of container is 39.14 L.

Answer:

56925842

Explanation:

its right

In 0.0158 mol of NaCl, there are a total of 0.0316 mol of ions. This is because each molecule of NaCl dissociates into one Na+ ion and one Cl- ion in water.

NaCl is an ionic compounds composed of sodium ions (Na+) and chloride ions (Cl-). In a solid state, NaCl exists as a crystal lattice, but when dissolved in water, it dissociates into its constituent ions.

The molar ratio of ions in NaCl is 1:1, meaning that for every NaCl molecule, one Na+ ion and one Cl- ion are formed. Therefore, the number of moles of ions is equal to the number of moles of NaCl. In this case, since there are 0.0158 mol of NaCl, there are 0.0158 mol of both Na+ ions and Cl- ions.

To calculate the total number of moles of ions, we add the moles of Na+ ions and Cl- ions together: 0.0158 mol + 0.0158 mol = 0.0316 mol.

Therefore, there are a total of 0.0316 mol of ions present in 0.0158 mol of NaCl.

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In 0.0158 mol of NaCl, there are a total of 2 moles of ions

In 1 mole of NaCl, there is 1 mole of sodium ions (\(Na^+\)) and 1 mole of chloride ions (\(Cl^-\)). Therefore, in 0.0158 mol of NaCl, there will be an equal number of moles of sodium and chloride ions.

So, the total number of moles of ions present in 0.0158 mol of NaCl is:

1 mole of \(Na^+\) + 1 mole of \(Cl^-\) = 2 moles of ions

Therefore, in 0.0158 mol of NaCl, there are a total of 2 moles of ions. This is because when NaCl dissociates in water, it forms one sodium ion and one chloride ion for every formula unit of NaCl.

It's important to note that the total number of moles of ions is independent of the concentration or volume of the solution. It solely depends on the number of moles of the compound present.

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Answer:

yes you can

Explanation:

Answer:

The percentage error is -2.4 %

Explanation:

The percentage error is calculated by the following formula;

\(Percentage \ error = \dfrac{Approximate - Exact }{Exact}\)

The given parameters are;

The atomic mass of cobalt = 58.933 amu. =  The exact value

The mass of cobalt as measured by the scientist = 57.514 = The approximate value

Therefore, the percentage error is given plugging in the values into the above equation for percentage error as follows;

\(Percentage \ error = \dfrac{(57.514- 58.933 )}{58.933 } \times 100 = -2.41\%\)

The percentage error = -2.4 %.

Answer:

Rubidium is a typical but very reactive member of the series of alkali metals. It is appreciably more reactive than potassium, but less so than caesium, and so would be expected to react more violently with those materials that are hazardous with potassium or sodium.

Answer:

Rb is more reactive .

Rubidium is the second most reactive metal and is very soft, with a silvery-white lustre.

..................

Water can exist in all three states—solid, liquid, and gas—under specific temperature and pressure conditions on Earth. These conditions are commonly found at the Earth's surface.

At temperatures below 0°C (32°F) and normal atmospheric pressure, water freezes and forms solid ice. In this state, water molecules are tightly packed in a crystalline structure.

At temperatures between 0°C and 100°C (32°F to 212°F) and normal atmospheric pressure, water exists as a liquid. In this state, water molecules have enough energy to move and flow freely.

At temperatures above 100°C (212°F) and normal atmospheric pressure, water vaporizes and becomes a gas. This process is known as boiling. In the gaseous state, water molecules have high energy and are widely dispersed.

These temperature and pressure conditions allow for the presence of liquid water in oceans, rivers, and lakes, solid water in the form of ice caps and glaciers, and gaseous water in the atmosphere as water vapor.

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Based on the data provided,  the heat gained by water is 2184.05 J and the heat capacity of silver is 0.537 J/g/°C

Quantity of heat, H = mcΔT

where

Also;

Heat capacity of water = 4.18 J/g/°C

Heat lost by silver = 43 * c * (120 - 25.5) = 4063.5c

Heat gained by water = 95 * 4.18 * (25.5 -20) = 2184.05 J

From heat lost = heat gained:

4063.5c = 2184.05 J

c = 2184.05/4063.5

c = 0.537 J/g/°C

Therefore, the heat gained by water is 2184.05 J and the heat capacity of silver is 0.537 J/g/°C

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The answer would be for this question is wave and orbital.

In the quantum mechanical model of the atom, an electron is seen as a wave substance that covered a 3- d space near the nucleus, the motion of the electron is explained by wave function, which is also called as a atomic orbital.

Wave function : It is a mathematical function it tells the position of the particular electron.

Atomic Orbital : It explains the position and wave kinda behaviour of an electron in the specific atom.

Quantum Mechanical model of the atom explains the particular position and functioning of an electron also it explains the different energy levels like orbital , energy sublevel and principal energy level.

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Rate of production of NO₂ = 0.2 M/

Rate of production of O₂ = 0.05 M/s

Given

The rate of N₂O₅ (dinitrogen pentoxide): 0.1 M/s

Reaction

2N₂O₅⇒4NO₂+O₂

Required

The rate of production of NO₂ and O₂ at the same time point

Rate of disappearance of N₂O₅ = reaction rate x coefficient of N₂O₅

0.1 M/s=reaction rate x 2

reaction rate = 0.05 M/s

The rate of production of NO₂=

Rate of production of NO₂ = reaction rate x coefficient of NO₂

Rate of production of NO₂ = 0.05 M/s x 4

Rate of production of NO₂ = 0.2 M/s

Rate of production of O₂ = reaction rate x coefficient of O₂

Rate of production of O₂ = 0.05 M/s x 1

Rate of production of O₂ = 0.05 M/s

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The correct option is:D. CH2BrCH2Br.  The product that results from the reaction of CH2=CH2 (ethylene) with Br2 (bromine) is CH2BrCH2Br (1,2-dibromoethane). The reaction of CH2==CH2 with Br2 is a halogenation reaction, which involves the addition of a halogen to an unsaturated organic compound.

The product that results from this reaction is CH2BrCH2Br, which is option D. This product is formed by the addition of one Br atom to each of the carbon atoms in the double bond of ethene. The resulting molecule is a dibromoalkane, which is a type of organic compound that contains two bromine atoms attached to adjacent carbon atoms. This reaction is an example of an addition reaction, where the unsaturated organic compound undergoes a reaction with a halogen to form a saturated organic compound. In summary, the correct answer is D, CH2BrCH2Br. This reaction is an example of an addition reaction, in which the bromine atoms are added to the carbon atoms in the double bond, resulting in a single bond between the carbon atoms and a bromine atom attached to each carbon.

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mark me brainliest

Explanation:

K. from Latin name kalium

Answer: I'm in no way like an expert but I've heard water goes from an elevated area to a lower area. So it should be arrows that start at a more elevated to less elevated. Like white to brown, and orange to yellow, and stuff like that. I hope that helped? Anyway, have a lovely day!

Explanation:

The mass of ammonia that would be produced is 312.5 g

First, we will write a balanced chemical equation for the reaction

The balanced chemical equation for the reaction is

3H₂(g) + N₂(g) → 2NH₃(g)

This means

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia.

First, we will determine the number of moles of each reactant present

For Hydrogen (H₂)

Mass = 83.6 g

Molar mass = 2.016 g/mol

Using the formula

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

Number of moles of H₂ present = \(\frac{83.6}{2.016}\)

∴ Number of moles of H₂ present = 41.468254 moles

For Nitrogen (N₂)

Mass = 257 grams

Molar mass = 28.0134 g/mol

∴ Number of moles of N₂ present = \(\frac{257}{28.0134}\)

Number of moles of N₂ present = 9.174181 moles

Since,

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia

Then,

27.522543 moles of hydrogen gas will react with the 9.174181 moles of nitrogen gas to produce 18.348362 moles of ammonia

∴ 18.348362 moles of ammonia will be produced during the reaction

Now, for the mass of ammonia that would be produced

From the formula

Mass = Number of moles × Molar mass

Molar mass of ammonia = 17.031 g/mol

Mass of ammonia that would be produced = 18.348362 × 17.031

Mass of ammonia that would be produced = 312.49095 g

Mass of ammonia that would be produced ≅ 312.5 g

Hence, the mass of ammonia that would be produced is 312.5 g

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Answer:

0 kgm/s

Explanation:

The momentum of Bob while resting at the river is 0 kgm/s.

This is because the momentum of any object at rest is 0.

 Momentum is the quantity of motion a body contains. It is mathematically expressed as;

  Momentum  = m x v

m is the mass

v is the velocity

 So at rest, the velocity of a body is 0m/s and therefore, the momentum is O

The limiting reactant is H₂ because it has a lower yield. The correct option is A.

Limiting reactants in a reaction are the reactants that are used up in a given reaction in the presence of excess reactants.

Limiting reactants determine the amount of a product that can be formed in a reaction.

Limiting reactants result in the formation of the smallest amount of a product in a reaction.

Considering the given equation of reaction:

N₂ + 3 H₂ → 2 NH₃

The mole ratio of the reactants in the reaction is 1 : 3 for nitrogen and hydrogen.

10.1 g N₂ produces 0.72 moles NH₃.

1.2 g H₂ produces 0.39 moles NH₃.

The least amount of product that is formed is from hydrogen. Hence, hydrogen is the limiting reactant.

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Answer:

Hypothesis

Explanation:

The experiment is giving him the same value because he is using two strong acid