Help with question 9 I just need a fresh explanation because I don’t get the way my teacher does it

You should add 0.089 mol of silver fluoride to the 500 ml volumetric flask to get the desired concentration.

To make an aqueous solution of 0.178 M silver fluoride, you need to add a certain amount of silver fluoride to a known volume of water.

Since you want to make a 500 ml solution and the desired concentration is 0.178 M, you can use the formula:

molarity = moles of solute/liters of solution

Rearranging this equation to solve for moles of solute:

moles of solute = molarity x liters of solution

Therefore, to make a 0.178 M solution, you need to add:

moles of solute = (0.178 mol/L) x (0.5 L) = 0.089 mol

So you should add 0.089 mol of silver fluoride to the 500 ml volumetric flask to get the desired concentration.

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Answer:

Weather:

- The wind is blowing from the south.

- There is a thunderstorm warning.

- The average high temperatures for July in Yellowknife is 32.5 degrees Celcius.

- The wind is blowing at 56 km / hr.

Climate:

- The average temperature for February in Australia is 19 degrees Celsius.

- The average rainfall for June in Kenya is 3.3cm.

- 10mm of rain fell today.

- It is usually cold in Ottawa in January. -There was a cold weather advisory on Jan 21 2020.

-Hurricanes are most likely to hit the Gulf of Mexico and the Carribean.

Explanation:

Hope it helps.

Tetrahedral \(Cd^2^+\) complex: \([Cd(en)_2]^2^+\), Tetrahedral \(Zn^2^+\) complex: \([Zn(OH)_4]^2-\) is the correct formula for complex ions.

In coordination chemistry, complex ions are formed when a central metal ion is surrounded by ligands. In a tetrahedral \(Cd^2^+\) complex with ethylenediamine ligands (en), there are two ethylenediamine ligands coordinated to the central \(Cd^2^+\) ion, giving the complex formula \([Cd(en)_2]^2^+\).

For a tetrahedral \(Zn^2^+\) complex with hydroxide (OH-) ligands, there are four hydroxide ligands coordinated to the central \(Zn^2^+\) ion, resulting in the complex formula \([Zn(OH)_4]^2-\).

The geometries of these complexes are tetrahedral due to the arrangement of ligands around the central metal ion.

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Answer:

14,250 years old.

Explanation:

First, multiply the two lifetimes. - 11,400.

Then, divide 5,700 in half for the 0.5 lifetime. - 2,850.

Lastly, add them all up. - 11,400 + 2,850 = 14,250 years old.

sorry if incorrect <3

thats what i understood XD

Answer:

P₂ = 1.05 atm

Explanation:

Given data:

Initial temperature = 24.0 °C (24+273 = 297 K)

Initial pressure = 0.900 atm

Final pressure = ?

Final temperature = 75 °C (75 + 273 =348 K)

Volume = constant

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

0.900 atm / 297 K = P₂/348 K

P₂ = 0.900 atm × 348 K / 297 K

P₂ = 313.2 atm. K /297 K

P₂ = 1.05 atm

Considering the frequency of non-polar bonds in each type of molecule, the molecule with the most potential energy should be the one with the highest number of non-polar bonds.

Non-polar bonds are stronger than polar bonds and so molecules with more of these bonds can store more energy due to their increased stability. For example, molecules with higher amounts of carbon-carbon and carbon-hydrogen bonds tend to have higher potential energies than molecules with more polar bonds such as oxygen-hydrogen bonds. Non-polar bonds are bonds between two atoms that have the same electronegativity, such as two atoms of carbon or two atoms of hydrogen. These bonds do not have a charge distribution and no molecules are attracted to them, which makes them non-polar. Polar bonds, on the other hand, are bonds between two atoms with different electronegativities, such as oxygen and hydrogen or nitrogen and hydrogen. These bonds have a partial charge distribution, which means that molecules are attracted to them, and this makes them polar.

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Answer:

Explanation:

During condensation reaction, two molecules combine to form a single molecule with the loss of a small molecule; in dehydration reaction, this lost molecule is water.

The reaction is a small molecule formed from the atoms removed from a single reactant molecule this reaction is knowing as condensation reaction.

Essentially, this is the reverse process of vaporization. In order for water vapor to undergo the process of condensation, which is the change from a gaseous state to a liquid state, it is necessary for a reduction in its temperature to occur until it reaches the dew point or an increase in the pressure to which it is subjected.

In this case the condensation reaction are when two molecules combine to form a single molecule with the loss of a small molecule, in dehydration reaction, this lost molecule is water.

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Answer:the liquid

Explanation: its harmful

this was great and fun to do

Answer:

The answer would be 0.004276728059999999 kilograms. Rounded it would be 0.004 kilograms

Explanation:

0.0043 kilograms are equal to 3.3 scruples.

Measuring quantities are those quantities that are used to measure some quantities of substances. Like volume, mass, length, etc. Kilograms and grams are the measuring quantity used to measure the mass of an object.

A unit is basically just a specific amount of a quantity that is used as a benchmark when measuring that quantity.

Units of measurement were frequently decided upon a long time ago. It is one meter long since it is the foundation unit of length that scientists have agreed to use. There were various possible lengths for a meter.

1 scruple = 20 grains

1 grain = 64.79891 milligrams = 0.065 g = 0.000065 kg

3.3 scruples is equal to: 3.3 x 20 x 0.000065 = 0.0043 kg.

Thus, 3.3 scruples = 0.0043 kg.

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Answer: I think it’s unbalanced because you can make it balanced

Explanation:

The molar concentration of imidazole in the final solution is approximately 0.595 M.

First, we need to calculate the mass of the imidazole added to the solution. Since we added four drops of 0.25 M imidazole solution, we can assume that the volume of each drop is approximately 0.05 mL (this value can vary depending on the size of the dropper).

Therefore, the total volume of imidazole solution added is:

4 drops x 0.05 mL/drop = 0.2 mL

To convert this volume to liters, we need to divide by 1000:

0.2 mL / 1000 = 0.0002 L

The moles of imidazole added to the solution can be calculated using the formula:

moles = M x V

where;

moles = 0.25 M x 0.0002 L = 0.00005 moles

Next, we can calculate the mass of ferrihemoglobin in the final solution:

mass = 2.739 g - 2.655 g = 0.084 g

To calculate the molar concentration of imidazole in the final solution, we can use the formula:

Molarity = moles of solute / volume of solution (in liters)

density of ferrihemoglobin = 1.0 g/mL (approximate value)

volume of ferrihemoglobin solution = mass / density = 0.084 g / 1.0 g/mL = 0.084 mL

If we assume that the volume of the imidazole solution is negligible compared to the volume of the ferrihemoglobin solution, we can use the total volume as:

volume of solution = 0.084 mL = 0.000084 L

Now we can calculate the molar concentration of imidazole in the final solution:

Molarity = 0.00005 moles / 0.000084 L = 0.595 M

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Answer:

750 m

Explanation:

Hi there!

We're given that:

⇒ The speed of the car is 25 meters/second

⇒ The car travelled a certain distance in 30 seconds

To calculate distance, use the formula:

Distance = Speed × Time

Distance = 25 × 30

Distance = 750

Therefore, the car travelled a distance of 750 m in 30 seconds.

I hope this helps!

Answer:

\(\boxed {\boxed {\sf 750 \ meters}}\)

Explanation:

We are asked to find the distance a car traveled. Distance is the product of speed and time.

\(d= s \times t\)

The speed of the car is 25 meters per second. The time is 30 seconds.

\(d= 25 \ m/s * 30 \ s\)

The units of seconds cancel each other out.

\(d= 25 \ m * 30\)

\(d= 750 \ m\)

The car traveled 750 meters in 30 seconds at a speed of 25 meters per second.

Answer: 70.0°C

Explanation:

Quantity of heat = Mass * Specific heat * Change in temperature

Quantity of heat = 104.6 KJ

Mass = 500.0 g

Specific heat of water is 4.18 J/g°C

Change in temperature assuming final temperature is x = x - 20

Units should be in grams and joules:

104,600 = 500 * 4.18 * (x - 20)

104,600 = 2,090 * (x - 20)

x - 20 = 104,600/2,090

x = 104,600/2,090 + 20

x = 69.8

= 70.0°C

Climate refers to the long-term average of temperature, humidity, precipitation, and other atmospheric conditions in a particular region over a period of time, usually 30 years or more.

Climate can be classified into different types,  similar as tropical,  thirsty, temperate, and polar, grounded on the temperature and  rush patterns.   Weather, on the other hand, refers to the day- to- day or short- term atmospheric conditions,  similar as temperature,  rush, wind speed, and  moisture, in a particular region.

Weather is  largely variable and can change  fleetly over a short period of time, ranging from  twinkles to days.   In summary, climate represents long- term patterns of atmospheric conditions, while rainfall represents short- term and  largely variable atmospheric conditions.

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The pH of 3.2 × 10−3 M H2CO3 solution is 4.44. It is defined as the negative logarithm of hydrogen ion concentration. Option C is the correct answer.

To calculate the pH of a 3.2 × 10⁻³ M H₂CO₃ solution, we first need to determine the concentration of H⁺ ions. H₂CO₃ is a weak acid, meaning it does not completely dissociate in water. Therefore, we need to use the acid dissociation constant (Ka) for H₂CO₃, which is 4.45 × 10⁻⁷. The equilibrium equation for H₂CO₃ dissociation is:
H₂CO₃ ⇌ H⁺ + HCO₃⁻
We can set up an equilibrium expression using the Ka:

\(Ka=\frac{[H+][A-]}{[HA]}\)
Ka = [H⁺][HCO₃⁻] / [H₂CO₃]
Since the initial concentration of H⁺ and HCO₃⁻ ions is zero, we can use the variable 'x' to represent their concentrations at equilibrium:
Ka = (x)(x) / (3.2 × 10⁻³ - x)
Now we solve for 'x':
4.45 × 10⁻⁷ = x² / (3.2 × 10⁻³ - x)
Assuming that 'x' is much smaller than 3.2 × 10⁻³, we can approximate the equation to:
4.45 × 10⁻⁷ ≈ x² / 3.2 × 10⁻³
Solving for 'x', we find the concentration of H⁺ ions:
x ≈ √(4.45 × 10⁻⁷ × 3.2 × 10⁻³) ≈ 3.77 × 10⁻⁵ M
Finally, we use the pH formula to find the pH of the solution: \(pH=-log[H+]\)

pH= -log(3.77 × 10⁻⁵) ≈ 4.44
Therefore, the pH of the 3.2 × 10⁻³ M H₂CO₃ solution is approximately 4.44 (option c).

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Explanation:

Jesus Christ had dreads so shake em', I ain't got none but I'm planning on growing some

Answer:

ooo_SoSpooky add me :>

Arsenic belongs to the semimetal group 8A. Beryllium is the alkaline earth metal with the lowest atomic number.

The periodic table, commonly known as the periodic table of the elements, is an arrangement of chemical elements in rows and columns. It is frequently utilized in chemistry, physics, and other disciplines, and is widely regarded as a chemical icon. The periodic table is a tabular array of chemical elements sorted by atomic number, beginning with hydrogen and progressing to oganesson, which has the greatest atomic number. Because of the arrangement of the elements, it is known as the periodic table. You'll note that they're organized in rows and columns. Periods are horizontal rows that run from left to right, while groups are vertical columns that run from top to bottom.

Here,

Arsenic is a semimetal of group 8A. Beryllium has the least atomic number of any alkaline earth metal.

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Answer:

Explanation:

the addition of the soluable salt will cause the boiling point to be higher

a) greater than 200 degrees C. if an insoluble salt is added to a liquid that typically boils at 200 degrees C, its new boiling point will be greater than 200 degrees C.

When an insoluble salt is added to a liquid, it causes a change in the vapor pressure of the liquid, which in turn affects the boiling point of the liquid. The addition of an insoluble salt to a liquid raises its boiling point.

This is because the presence of the solute in the liquid reduces the vapor pressure of the liquid, making it more difficult for the liquid to boil. The boiling point of the liquid increases until the vapor pressure of the liquid once again matches the external pressure, at which point the liquid will boil.

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Answer:

When you are exercising, your muscles need extra oxygen—some three times as much as resting muscles. This need means that your heart starts pumping faster, which makes for a quicker pulse. Meanwhile, your lungs are also taking in more air, hence the harder breathing.

Explanation:

The property rights and contract enforcement are considered to be most important to economic growth.

When considering economics and the law, two factors that are widely considered to be crucial for economic growth are property rights and contract enforcement. These two elements play a fundamental role in promoting investment, innovation, and overall economic activity within a society.

1.Property Rights: Secure property rights are vital for economic growth as they provide individuals and businesses with the incentive to invest, improve, and utilize their resources efficiently.

When people have confidence that their property will be protected and that they can reap the benefits of their investments, they are more likely to engage in productive activities.

Strong property rights also enable individuals to access credit and collateralize their assets, facilitating entrepreneurship and economic development.

2.Contract Enforcement: A robust legal framework that ensures the enforcement of contracts is essential for fostering economic growth.

Contracts provide a mechanism for individuals and businesses to establish agreements, mitigate risks, and engage in economic transactions.

When contracts are enforceable, parties have greater certainty and confidence in their business dealings, encouraging investment, trade, and cooperation.

Reliable contract enforcement reduces transaction costs, promotes trust, and facilitates long-term economic relationships, both domestically and internationally.

The combination of secure property rights and effective contract enforcement creates an environment of legal certainty and economic stability. This framework encourages investment, innovation, and entrepreneurship, leading to increased productivity, job creation, and overall economic growth. It attracts domestic and foreign investors, fosters competition, and supports the development of vibrant markets.

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Answer:

I guess it's nervous system

Answer:

Yah Its Nervous System.

The mass of Cu(s) produced is 5.30 grams.

To calculate the mass of Cu(s) produced in the reaction between copper(II) oxide (CuO) and aluminum (Al), we need to use the given number of atoms of aluminum (147.62x\(10^{23}\)) and the stoichiometry of the balanced equation. From the balanced equation, we can see that the ratio of Cu(s) to Al(s) is 3:2. Therefore, we can set up a proportion to calculate the moles of Cu(s) produced.

(147.62x\(10^{23}\) atoms Al) * (3 mol Cu / 2 mol Al) * (63.55 g Cu / 1 mol Cu) = 5.30 grams of Cu(s)

So, the mass of Cu(s) produced is 5.30 grams when 147.62x\(10^{23}\) atoms of Al react with an excess of CuO and the reaction goes to 100% completion.

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ANSWER

The final volume of the solution is 1900mL

EXPLANATION

Given information

The initial volume is 380mL

The initial concentration is 0.47M

The final concentration is 0.094M

To find the final volume of the solution, follow the steps below

Step 1: Write the dilution formula

Step 1: Substitute the given data into the formula in step 1

Let the final volume be V2

Hence, the final volume of the solution is 1900mL

The correct answer is C. High energy of activation for conversion of ATP to ADP.

The Gibbs' free energy change (ΔG) for the hydrolysis of ATP is negative, indicating that it is an exergonic reaction and releases energy. Several factors contribute to this large negative ΔG. Let's analyze the options:

A. The ratio of [ATP] to [ADP] in cells: This ratio is important because a high concentration of ATP relative to ADP drives the hydrolysis reaction forward, contributing to the negative ΔG.

B. Resonance stabilization of the hydrolysis products: The hydrolysis products, ADP and inorganic phosphate (Pi), are stabilized by resonance, which helps to lower the overall energy and contribute to the negative ΔG.

C. High energy of activation for conversion of ATP to ADP: This option is the correct answer. The energy of activation refers to the energy barrier that must be overcome for a reaction to occur.

However, the question asks for the factor that does not contribute to the negative ΔG.

The energy of activation is a kinetic property and is not directly related to the thermodynamic favorability of the reaction. Therefore, it does not contribute to the large negative ΔG.

D. Relief of charge repulsion between phosphate groups upon hydrolysis: ATP contains three phosphate groups, which carry negative charges. The hydrolysis of ATP releases ADP and Pi, relieving the charge repulsion and contributing to the negative ΔG.

To summarize, option C, the high energy of activation for the conversion of ATP to ADP, does not contribute to the large negative Gibbs' free energy change when ATP is hydrolyzed.

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Answer:

Yes particles don't touch

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option A.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Atoms can make many different molecules, just like letters can make many different words.

In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.

Therefore, the correct option is option A that is Atoms can make many different molecules, just like letters can make many different words.

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Answer:

high

Explanation: