A sample of an ideal gas has a volume of 2.32 L at 285 K and 1.02 atm. Calculate the pressure when the volume is 1.76 L and the temperature is 308 K.

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The type(s) of intermolecular forces exhibited by hydrogen bromide molecules, HBr, are dipole-dipole interactions and London dispersion forces.

Hydrogen bromide (HBr) is a polar molecule due to the difference in electronegativity between hydrogen and bromine atoms. Bromine is more electronegative than hydrogen, resulting in a partial negative charge on the bromine atom and a partial positive charge on the hydrogen atom. This creates a permanent dipole moment in the HBr molecule. Dipole-dipole interactions occur between the positive end of one molecule (the hydrogen atom) and the negative end of another molecule (the bromine atom). These intermolecular forces are relatively stronger than the London dispersion forces.

In addition to dipole-dipole interactions, hydrogen bromide molecules also experience London dispersion forces. These forces arise due to temporary fluctuations in electron distribution within molecules. Even though HBr is a polar molecule, it can still exhibit London dispersion forces since all molecules, regardless of polarity, have electrons that are constantly in motion. These temporary fluctuations in electron distribution create instantaneous dipoles, leading to attractive forces between neighboring molecules.

Overall, the intermolecular forces in hydrogen bromide (HBr) include both dipole-dipole interactions and London dispersion forces. These forces play a crucial role in determining the physical properties and behavior of HBr, such as boiling point, solubility, and viscosity.

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Answer:

a. friction

Explanation:

What is a common unbalanced force acting in motion? Common forces that are often unbalanced include the force of gravity and applied forces. When these forces are unbalanced, objects accelerate, change their position and find new configurations for which all forces are again balanced.

Friction is a kind of force.

Answer:

1. Yes, a person can separate this mixture best using a small screen or strainer and magnet.

Explanation:

iron is magnetic

Answer: A buffer solution is a solution made to prevent the pH level of something from changing when you add a base or an acid to it. For example, if you put a buffer solution in a pool, and then you put chlorine in it, the chlorine's effect on the PH level will be suppressed.

The answer is option

The reaction:

is a Synthesis reaction, because from 2 different substances it is produced

Answer:

Explanation:

Evaporation and condensation

Hope dis helps!

Answer:

The answer is B. sound; light

Explanation:

Answer:

London dispersion

Explanation:

The type of van der waals forces that exists between molecules of oxygen is the london dispersion forces.

Answer:

The type of van der waals forces that exists between molecules of oxygen is the london dispersion forces. van der waals forces are intermolecular forces. these are weak attractions joining non-polar and polar molecules together

Explanation:

NO2 exists as O=N+-O, as a nucleophilic leaving group it should be in form of O=N-O¯. Hence, (a) is correct

What is nucleophilic aromatic substitution?

It is a reaction in in which a nucleophile displaces a leaving group on an aromatic ring.

The presence of EWG increases the rate of nucleophilic aromatic substitution

Nucleophilic aromatic substitution does not follow SN2 reaction mechanism, as the substitution takes place at trigonal carbon atom having sp3 hybridization.

It does not proceeds by SN2 reaction mechanism because of the steric hindrance of the benzene ring.

In the presence of a superior leaving group, the SN1 reaction pathway may be followed by nucleophilic aromatic substitution.

The SN1 reaction would result in the production of an aryl carbocation and the removal of the leaving group.

In most cases, elimination addition or addition elimination route is followed by nucleophilic aromatic substitution.

NO2 exists in the form of O=N+-O, as a nucleophilic leaving group it should be in form of O=N-O¯.

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The acidic or alkaline character of a solution is obtained from the value of pH. Here baking soda is a base which neutralizes the acid.

The pH of a solution is defined as the negative logarithm of hydronium ion concentration in moles per litre. It can be expressed as:

pH = -log [H₃O⁺]

For acidic solution, the pH will be less than 7 and for basic solution the pH will be greater than 7.

Here the sample of water which has the pH of 5.6 is acidic and it is neutralized by the base baking soda.

Thus we can say that baking soda is a base.

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Answer:

C₅H₁₂ + 8O₂ → 5CO₂ + 6H₂O

Explanation:

Let's start by counting how many molecules we have on each side.

Reactants

C - 5

H - 12

O - 2

Products

C - 1

O - 3

H - 2

We have to balance both sides. Since we have 5 carbon atoms on the reactants side and 1 carbon atom on the products side, we'll start with that. Write 5 as the coefficient for CO₂ to balance the carbons.

C₅H₁₂ + O₂ → 5CO₂ + H₂O

Now that the carbons are balanced, let's look at the hydrogens. There's 12 on the reactants side and 2 on the products side. To balance the hydrogens, we have to write 6 as the coefficient for H₂O.

C₅H₁₂ + O₂ → 5CO₂ + 6H₂O

Now the hydrogens are balanced. All that's left to do is balance the oxygens. Let's start by counting how many atoms we have on each side.

Reactants

C - 5

H - 12

O - 2

Products

C - 5

H - 12

O - 16

So, to balance the number of atoms on both sides, write 8 as the coefficient for O₂.

C₅H₁₂ + 8O₂ → 5CO₂ + 6H₂O

Lastly, let's check to make sure everything is balanced.

Reactants

C - 5

H - 12

O - 16

Products

C - 5

O - 16

H - 12

Both sides are balanced. Therefore, the balanced chemical equation is: C₅H₁₂ + 8O₂ → 5CO₂ + 6H₂O.

Hope that helps.

Answer:

\(\boxed{C_{5}H_{12} + 8O_{2} -->5CO_{2} + 6H_{2}O}\)

Explanation:

Part 1: Count the number of atoms on each side per element

To start, count the number of atoms per element on both sides of the equation.

Left Side

C - 5 atoms

H - 12 atoms

O - 2 atoms

Right Side

C - 1 atom

H - 2 atoms

O - 3 atoms

Part 2: Balance carbon atoms

Now, with this information, you can begin finding out how to properly balance both sides of the equation.

You need 5 carbon atoms on the left, so place a coefficient of 5 in front of the \(CO_{2}\) product. This will balance the carbons. Do not place a coefficient in front of the \(C_{5}H_{12}\) reactant - none are necessary!

Then, you can update your counts for your atoms.

Left Side

C - 5 atoms

H - 12 atoms

O - 2 atoms

Right Side

C - 5 atoms

H - 2 atoms

O - 11 atoms

The updated equation will look like this:

\(\boxed{C_{5}H_{12}+O_{2} --> 5CO_{2} + H_{2}O}\)

Part 3: Balance hydrogen atoms

Now, balance the hydrogen atoms. Place a coefficient of 6 in front of the \(H_{2}O\) product. This will balance the hydrogen atoms.

Once again, update the atom counts:

Left Side

C - 5 atoms

H - 12 atoms

O - 2 atoms

Right Side

C - 5 atoms

H - 12 atoms

O - 16 atoms

The updated equation will look like this:

\(\boxed{C_{5}H_{12} +O_{2}--> 5CO_{2} +6H_{2}O}\)

Part 4: Balance oxygen atoms

To fully balance the equation, place a coefficient of 8 in front of the \(O_{2}\) reactant. This will equalize the amount of oxygen atoms on both sides of the equation.

The updated equation will look like this:

\(\boxed{C_{5}H_{12} + 8O_{2} --> 5CO_{2} + 6H_{2}O}\)

Part 5: Check the equation and atom counts

Now, update the atom counts one last time to make sure they are equal.

Left Side

C - 5 atoms

H - 12 atoms

O - 16 atoms

Right Side

C - 5 atoms

H - 12 atoms

O - 6 atoms

They are equal, so you may proceed.

Part 6: Check if reductions are necessary

If the equations coefficients can all be divided by a common divisor (i.e., 3), follow up with that step. However, any equation that has a reactant or product without a coefficient, skip this step entirely.

This equation falls into that category, so you may proceed past it.

Your final equation will look like this: \(\boxed{C_{5}H_{12} + 8O_{2} -->5CO_{2} + 6H_{2}O}\)

Answer:42 atoms at least

42

Explanation:

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To find the molar mass of gas Y, we'll consider the given mass, volume, and the terms "mass", "gas", and "molar".

Molar Mass is also defined as the mass of a substance in grams contained within one mole of the supplied component.

A mole is the amount of molecules of a substance that are present in the supplied substance.

The number of molecules or atoms on any mole is fixed at 6.02214076 1023. Molar mass is measured in grams per mole.

Here's the step-by-step explanation:

1. We're given the volume of gas Y as 1.12 liters and its mass as 6.23 g at STP (Standard Temperature and Pressure).
2. At STP, 1 mole of any gas occupies 22.4 liters.
3. To find the number of moles of gas Y, divide the given volume by the volume of 1 mole of gas at STP: 1.12 L / 22.4 L/mol = 0.05 mol.
4. Now, to calculate the molar mass of gas Y, divide the given mass by the number of moles: 6.23 g / 0.05 mole = 124.6 g/mol.

The closest answer to 124.6 g/mole is 125 g/mole, so the molar mass of gas Y is:

C) 125 g/mole

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Answer: Glenn B Anderson

Explanation:

I got it right

Answer: c

Explanation: built different

Detergent, ethanol, and salt can all play important roles in extraction processes, depending on the specific type of biomolecule being extracted and the purification needs.

Detergent, ethanol, and salt can all play important roles in different types of extraction processes. Here's an overview of how each of them can be used:

Detergent: Detergents are often used to extract proteins or other biomolecules from biological samples. Detergents are able to solubilize membrane-bound proteins by disrupting the lipid bilayer of the cell membrane. This allows the proteins to be extracted into a solution. Detergents can also help to break apart protein complexes, making it easier to isolate individual proteins.

Ethanol: Ethanol is commonly used as a solvent in extractions because it can dissolve a wide range of organic compounds, including lipids and proteins. Ethanol can also be used to precipitate DNA or RNA from a solution. When added to a solution of DNA or RNA, ethanol causes the nucleic acids to clump together and form a visible precipitate, which can then be collected and further purified.

Salt: Salt is often used in DNA and RNA extractions to help remove proteins and other impurities from the sample. When salt is added to a solution, it can cause proteins to denature and precipitate out of the solution. The salt can then be removed along with the precipitated proteins. In addition, salt can help to bind DNA or RNA to a solid support, such as a column or a membrane, making it easier to isolate the nucleic acid from other components of the sample.

In summary, detergent, ethanol, and salt can all play important roles in extraction processes, depending on the specific type of biomolecule being extracted and the purification needs. Detergents are useful for solubilizing proteins, ethanol can dissolve a wide range of organic compounds, and salt can help to remove impurities and bind DNA or RNA to a solid support.

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We should only carry out terrace farming on the sloppy land.​ This is the type of farming done on slope land

Terrace farming is a method of farming where steps (terraces) are built into the slopes of a hill or mountain to create flat surfaces for cultivation. This technique is commonly used in areas with steep slopes or hills where traditional flat farming is not feasible.

The terraces help to prevent soil erosion, improve water retention, and make it easier to cultivate crops. Terrace farming has been used for centuries by various civilizations around the world, including the Incas in South America and the rice farmers of Southeast Asia.

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Answer:

Steel is a popular material for building because it is strong without being extremely heavy. This makes it the ideal material for large, multi-story buildings and manufacturing and industrial facilities. Unlike wood, steel can stand up to moisture and is not susceptible to termites and fire

Explanation:

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The importance of the use of hydrates in fire extinguishers are;

-They keep fire extinguishers dry during shipping and storage.

-They create foams that have high water content to help extinguish fires.

They create high pressure in the cylinder to quickly force out the fire r*tardant.

We know that a fire extinguisher has to do with any device that has been made in such a way that the device can be used to eliminate a flame that is burning. We all know that fore can be very destructive. This implies that it is important to be able to put out the fire so that it does not cause big problems.

The fire extinguisher is composed of certain chemical substances that are able to react together quickly and then be able to quench the flame of the reaction that is going on in the system.

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1 grams Fe(NO3)2 = 0.0055600406550173 mole using the molecular weight calculator and the molar mass of Fe(NO3)2.

most prolly option D

Explanation:

NaCl + H2SO4 -> Na2SO4 + HCl[g]

The reaction between between common salt and concentrated tetraoxosulphate(vi) acid will liberate Hydrogen chloride gas .

This is the type of reaction in which two or more elements/compounds react  together to form a new substance.

The reaction between common salt and concentrated tetraoxosulphate(vi) acid can be seen below:

NaCl + H2SO4 ⇒ Na2SO4 + HCl(g)

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Answer:

Pistil connects the stigma to the ovary

The molarity of the diluted solution is 2.36M

M₁L₁ = M₂L₂

M₂ = M₁L₁/L₂

M₂ = (5.00 M x 0.850 L)/ 1.80 L

M₂ = 2.36 M Cu(NO₃)₂

The volume of a material present in a given volume of solution is known as its molarity (M). The number of moles of a solute in a liter of solution is referred to as molarity. The term "molarity" can also refer to a solution's molar concentration. Molarity (M) is the number of moles of a solute per liter of a solution, also referred to as the molar concentration of a solution. The symbols mol/L or, more commonly, M can be used to represent molarity. The word "molar concentration" refers to the amount of a substance per unit volume of solution and is used to describe the concentration of a chemical species, specifically a solute, in a solution. Molarity, amount, and substance concentration are other names for this term.

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The term used for high-income industrialized nations, which have high living standards and the most technically developed infrastructure is known as "developed countries" or "first world countries".

These countries are typically characterized by advanced economies, high levels of education and healthcare, and a focus on innovation and technology. Some examples of developed countries include the United States, Canada, Japan, and many countries in Western Europe. However, it is important to note that not all developed countries have the same level of economic or social development, and there are still significant disparities within and between these nations.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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A loss of negatively-charged electrons corresponds to an increase in oxidation number, while a gain of electrons corresponds to a decrease in oxidation number. Therefore, the element or ion that is oxidized undergoes an increase in oxidation number.

Hope this helped

Answer:  P2 = 0.858 atm

Explanation:

Use the combined gas law:  P1V1/T1 = P2V2/T2,

where the subscripts are the initial (1) and final (2) states.  Temperature must be in Kelvin.  We want P2, so rearrange the equation to solve for P2:

P2 = P1(V1/V2)(T2/T1)

Note how I've arranged the volume and temperature values:  as ratios.  Now it is easy to cancel units and see what is going to happen to the pressure if we lower the temperature.  Since the pressure change is a function of (T2/T1), and we are lowering the temperature (T2), we'd expect this to decrease the pressure.

No information is given on volume, so we'll assume a convenient value of 1 liter.  Now enter the data:

P2 = (0.917atm)*(1)*(322K/344K)

P2 = 0.858 atm

Mass of the block of wood = 3.25 cm

Density of the block of wood = 0.945 g/ cm³

\(p = \frac{e}{t} \)

where e is the energy.

& t is the time.

\(p = \frac{200}{5} = 40 \: w\)