Calculate the followin gquantites and record teh data in the table below:
Average volume of NaOH solution dispensed (mL): 9.03 mL
average number of moles of NaOH dispensed: _____
average concentration of the acid (mol/L): ____
I am not sure how to answer the two blank values. I have 0.00200 moles if that helps for the calculation! Will rate, thanks, let me know if more info needed!
Here is the procedure for this experiment:
Experiment 2: Use the Standardized NaOH Solution to Determine the Concentration of an Acid
Part 1: Perform a Coarse Titration
Take a 250 mL Erlenmeyer flask and a 50 mL graduated cylinder from the Containers shelf and place them on the workbench.
Take acetic acid #1 (unknown concentration) from the Materials shelf and add 25 mL to the graduated cylinder. Double-click the graduated cylinder to read and record the exact volume, then transfer the liquid to the flask.
Take phenolphthalein from the Materials shelf and add two drops to the flask.
Take a pH meter from the Instruments shelf and place it into the Erlenmeyer flask. Record the pH.
Take the NaOH solution from the workbench and refill the burette as described previously. Double-click to read and record the starting volume.
Move the Erlenmeyer flask onto the base of the burette.
Perform a coarse titration, adding large increments of titrant (~ 2 mL) from the burette by pressing and holding the stopcock at the bottom of the burette. Pause after each dispensation. Record the volume dispensed.
Check if the end point has passed. When the reaction reaches the end point, the solution changes color. Also, as more sodium hydroxide is added to the acetic acid solution, the pH increases.
Stop once you reach the end point. Record the dispensed volume and pH at which this occurs. Record both the last dispensed volume where the solution was colorless (right before the end point) and the first dispensed volume where the solution changed color. You will use the volume dispensed right before the end point in the fine titration.
Clear your station by emptying the Erlenmeyer flask into the waste, then placing the flask in the sink.
Part 2: Perform Fine Titrations
Set up the titration as described in steps 1 â 6 in part 1 of experiment 2.
Click and hold the stopcock of the burette to quickly add the "before the end point" volume of sodium hydroxide determined in the coarse titration.
Add sodium hydroxide in small increments, down to one drop at a time. This can be tedious, but if you click and hold you might miss the exact end point of the titration.
When the solution changes color, stop adding titrant. Record both the pH and volume dispensed.
Clear your station by emptying the Erlenmeyer flask into the waste, then placing the flask in the sink.
Repeat the fine titration twice more, and record the results. Note: If you run out of standard solution you will need to repeat Experiment 1. A new standard solution will need to be prepared and analyzed.
Clear the bench of all materials, containers, and instruments, then return to your course page to complete any assignments for this lab.

Answer:

d

Explanation:

Answer:

6.022×1023 atoms

Explanation:

Answer:

it would decrease  /  increase with the mass

Explanation:

Answer:

Formula and structure: Lead sulfide chemical formula is PbS and its molar mass is 239.26 g mol-1. Lead sulfide is formed by the cation Pb+2 (the lesser oxidized ion of Pb) and the anion S-2 (the lesser oxidizer ion of S).

Explanation:

In the film Ice word Revenge, vehicle 2 did not fall of the cliff because,  but in Claire's test, vehicle 2 off the cliff because weight of vehicle 1 is greater than weight of vehicle 2.

the weight of an object is to the  force of  acting on their object due to gravity.

Claire's test, the weight of vehicle 1 is either equal to or greater than the weight of vehicle 2, so it was sufficient to push it down the cliff.  In the film Ice word revenge, the weight of vehicle 1 is less than the weight of vehicle 2, it is not sufficient to make it fall off the cliff ( Note: Looking exactly the same in to the movie, as Claire claimed, does not mean they have the same mass). Therefore if the  Claire wants a collision that is  will not make the vehicle 2 fall off the cliff, he should be the  collide it with a vehicle of lesser mass/weight.

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Answer:

I think its b be ause it looks like a better answer and it has some detail to it

When carbonated beverage is sealed, then it is saturated with carbon dioxide. Option B is correct.

The carbonation process involves in the dissolving carbon dioxide gas in water under high pressure, and when the pressure is released, some of the gas escapes and forms bubbles. The remaining carbon dioxide in the liquid is in a state of equilibrium with carbon dioxide in the gas phase, which means that solution is saturated with carbon dioxide at that pressure and temperature.

A carbonated beverage is a drink that has been infused with carbon dioxide gas under high pressure, resulting in a bubbly and fizzy texture. The carbonation process occurs when carbon dioxide gas is dissolved in water, which then forms carbonic acid. This carbonic acid is responsible for the tangy taste and slight burn that is often associated with carbonated beverages.

Hence, B. Saturated with carbon dioxide is the correct option.

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All species of life are metazoans. Eukaryotes with several cells and mitochondria are called metazoan animals.

All multicellular organisms with differentiated body parts, including tissues and organs, belong to the Metazoa group. They have specialized cells lining the cavity of their digestive system. They have nucleated cells with cell membranes.

The majority of metazoans have bilateral symmetry. They display the division of labor. The body organization of lower invertebrates is at the tissue or organ level, whereas the body organization of larger invertebrates and vertebrates is at the organ-system level. Unlike protozoans, which have a cell wall, animals don't.

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Answer:

C Ammonia

Pure water is neutral, so pH is about 7

Vinegar is acidic, pH is around 2-3

Ammonia is alkaline, pH around 11.6

Vitamin C is also acidic, pH is around 3.5 to 6

As pH increases with how alkaline the substance is, substances with a lower pH is more acidic, while substances with a higher pH is more alkaline

the question is asking for the highest pH, so you should choose the most alkaline substance

therefore the ans is C, which is ammonia

Using stoichiometric relationships:

\(P_4O_1_0 + 6H_20\)  →  \(4H_3PO_4\)

moles P4O10 = 9 mol

mol H2O = 51 mol/6

mol H2O = 8.5

H2O is limiting

\(51molsH_2O\) x \(\frac{4 mol H_3PO_4}{6 molH_2O}\)

∴ moles H3PO4 = 34 mol

Answer:

It's 36

Explanation:

6 x 6 = 36

Answer:

1. 4 toothpicks weigh 0.04 grams

2. about 0.60 grams

Explanation:

4 x 0.01 = 0.04 grams

Once chewed and swallowed, the food will be digested and absorbed nutrients, while the rest of the food will be excreted through the body's feces. This digestion process can take about 24-72 hours.

The process of digestion of food in humans can be divided into two types, namely mechanical digestion and chemical (enzymatic) digestion. Mechanical digestion is the process of changing food from a large or coarse form to a smaller or finer form. The process takes place in the mouth with the help of teeth and tongue. The mechanical digestion process also occurs in the stomach with the help of peristaltic motion of the stomach wall, so that food is like being stirred. While the chemical digestion process is the process of converting food substances from complex forms into simpler forms with the help of digestive enzymes.

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Answer: It is Gamma ray

Answer:

C. gamma ray

(Photo for proof at the bottom.)

Explanation:

A gamma ray is a type of radiation that occurs when an unstable nucleus emits a photon, the smallest unit of light. A photon has no mass or charge. Atomic and mass numbers are written based on the mass of the atom. But since no mass is lost when a photon is emitted, writing the emission of it isn't necessary.

Here's a photo of Edge, good luck.

Answer:

True

Explanation:

In general, metals are located on the left of the periodic table. Nonmetals are on the right. This means that they are on opposite sides.  So the answer is True.

Answer:

c is more compressed than d

Explanation:

Answer:

Dipole-dipole

- are the strongest intermolecular force of attraction.

Explanation:

Yun lang <3

The function that represents the amount of titanium-44 deposit in kilograms t years after discovery is: A(t) = 14 * e^(-t * ln(2)/63)

The decay of titanium-44 can be modeled by an exponential decay function, where the amount of titanium-44 remaining after t years is given by:

A(t) = A₀ * e^(-kt)

where;

To find k, we use the half-life of titanium-44, which is 63 years. The half-life is the time it takes for half of the initial amount of titanium-44 to decay. Therefore, we have:

0.5 A₀ = A₀ * e^(-k*63)

Dividing both sides by A₀, we get:

0.5 = e^(-k*63)

Taking the natural logarithm of both sides, we get:

ln(0.5) = -k*63

Solving for k, we get:

k = ln(2)/63

Substituting k into the equation for A(t), we get:

A(t) = A₀ * e^(-t * ln(2)/63)

Now we need to find A₀. We know that the deposit initially weighed 14 kilograms, so we have:

A₀ = 14 kg

Putting it all together, the function that represents the amount of titanium-44 deposit in kilograms t years after discovery is:

A(t) = 14 * e^(-t * ln(2)/63)

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For the given equation, the mole-to-mole ratio and volume-to-volume ratio for all the gaseous reactants and products are 1:1.

For the given equation:

CH4(g) + O2(g) → CO2(g) + H2O(g)

Reactant/Product:

CH4(g)

O2(g)

CO2(g)

H2O(g)

Mole-to-Mole Ratio:

By comparing the reactant and product coefficients, we may extract the mole-to-mole ratio from the balanced equation.

CH4(g): 1 mole

O2(g): 1 mole

CO2(g): 1 mole

H2O(g): 1 mole

All of the reactants and products have a mole-to-mole ratio of 1:1:1:1.

Ratio of Volume to Volume:

The ideal gas law, which states that under constant temperature and pressure, the volume of a gas is directly proportional to the number of moles in the gas, can be used to calculate the volume-to-volume ratio.

All gaseous reactants and products have a mole-to-mole ratio of 1:1, hence the volume-to-volume ratio will also be 1:1. As a result, the volume of drug A and substance B will be equal.

You can just take the volume of substance A as the value for substance B if you know the volume of substance A and are trying to solve for the volume of substance B. Alternatively, the quantity of substances A and Bwill be the same, given the 1:1 volume-to-volume ratio.

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Answer:

1. 254 milli

2. 5.3 centi

Explanation:

254 milli = 25.4 centi

53 milli = 5.3 centi

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

0.0625

Explanation:

Answer:

62,500

Explanation:

Answer:

ehh

Explanation:

mhh

Answer:

Answer Is A

Explanation:

The traditional fire-resistant material used in firefighters’ suits are made of asbestos fabric, Nomex, and Melamine while fire armor is made of leather, fabric, or mixed layers of both,  reinforced by quilting or felt, interwoven rings of iron or steel, metal, horn, wood, plastic, or some other similar tough and resistant materials.

This refers to an outfit made to protect a firefighter or volcanologist from extremely high temperatures. firefighters’ suits are made of the following materials Nomex an aramid fibre, Melamine a thermosetting plastic, asbestos fabric, Kevlar, and Indura, PBI, Proban etc.

This refers to an outfit that creates a shield around the user's body against fire.

Three type of Fire armour

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The amount of heat transferred from the metal to the water is approximately 134,064 Joules.

To calculate the amount of heat transferred from the metal to the water, you can use the formula:

Q = m × c × ΔT

Where:

Q is the heat transferred (in Joules)

m is the mass of the water (in grams)

c is the specific heat capacity of water (approximately 4.18 J/g°C)

ΔT is the change in temperature (in °C)

First, you need to determine the mass of the water. The volume of the water is given as 2.00 x 10² mL, which is equivalent to 2.00 x 10² g (since the density of water is approximately 1 g/mL).

Next, calculate the change in temperature:

ΔT = final temperature - initial temperature

ΔT = 38.7°C - 22.5°C

Now, you can calculate the amount of heat transferred:

Q = m × c × ΔT

Substituting the values:

Q = (2.00 x 10²g) × (4.18 J/g°C) × (38.7°C - 22.5°C)

Calculate the value to find the amount of heat transferred from the metal to the water in Joules.

Q = (2.00 x 10²) × (4.18) × (16.2)

Calculating the final value:

Q ≈ 134,064 Joules

Therefore, the amount of heat transferred from the metal to the water is approximately 134,064 Joules.

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The given statement " William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms" is false.

The mass spectrograph was not invented by William Aston. It was actually invented by J.J. Thomson in the early 20th century.

J.J. Thomson's work with the mass spectrograph led to the discovery of isotopes, which are different forms of an element with the same number of protons but different numbers of neutrons. Isotopes have different masses, and the mass spectrograph allowed scientists to separate and analyze them based on their mass-to-charge ratio.

The process of using a mass spectrograph to determine the mass and percent abundance of isotopes is known as mass spectrometry. It involves ionizing a sample, separating the ions based on their mass-to-charge ratio, and detecting the ions to determine their abundance.

The completed question is given as,

State true or false

William Aston created the mass spectrograph to analyze and separated them, found 218 and found mass and percent abundance of each atoms.

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The balanced equation for the reaction is: I2(s) + 2Cl-(aq) → 2I-(aq) + Cl2(g)

The reaction between solid iodine (I2) and aqueous chloride ions (Cl-) will produce iodide ions (I-) and chlorine gas (Cl2). The reaction is a redox reaction, with iodine being reduced and chloride being oxidized. In the reaction, the two chloride ions will react with one molecule of iodine, resulting in the formation of two iodide ions and one molecule of chlorine gas. The reaction is unbalanced, as the number of atoms of each element is not equal on both sides of the equation.To balance the equation, we need to multiply the chloride ions by two and the chlorine gas by two. This will result in the balanced equation shown above.

The reaction between iodine and chloride ions is a redox reaction, where iodine is reduced from its elemental state to the iodide ion and chloride is oxidized from its anion state to the chlorine molecule.When iodine and chloride ions are mixed together, the electrons in the chloride ions interact with the iodine molecule, causing the iodine to gain electrons and be reduced. This process results in the formation of iodide ions and the oxidation of the chloride ions.

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a) The Lennard-Jones potential predicts the separation r_eq at the minimum energy U_min.

b) The U_min for this interaction at T=298 K is the value obtained from the Lennard-Jones potential equation when r=r_eq.

c) The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the attractive part (-A/r^6) to the total potential energy U_min.

d) The ratio of r_eq to r_0, where u(r_0)=0.4, can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

e) The ratio of r_s to r_0, where r_s is the separation where the magnitude of the attractive adhesion force is maximum, can be determined by finding the value of r where the derivative of the potential energy with respect to r is equal to zero.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the potential energy equation with respect to r and evaluating it at r=r_s.

a) The Lennard-Jones potential provides information about the relationship between energy and separation between two interacting atoms.

At the minimum energy (U_min), the potential predicts the separation r_eq, which corresponds to the equilibrium distance between the atoms. This is the distance at which the energy of the system is at its lowest point.

b) To determine the value of U_min at a given temperature (T=298 K), you can substitute the equilibrium separation r_eq into the Lennard-Jones potential equation and calculate the resulting energy value.

This will give you the U_min for the interaction.

c) The Lennard-Jones potential consists of two components: an attractive component (-A/r^6) and a repulsive component (B/r^12).

The ratio of U_min to the purely attractive van der Waals component of the interaction potential at r_eq can be calculated by comparing the magnitude of the attractive component to the total potential energy at the equilibrium separation.

This ratio provides insights into the relative contribution of the attractive force to the overall potential energy at equilibrium.

d) The ratio of r_eq to r_0 can be determined by finding the value of r_eq where the potential energy is equal to 0.4 times the total potential energy at r=r_0.

In other words, you need to solve the Lennard-Jones potential equation for r_eq when the potential energy is equal to 0.4 times the potential energy at r=r_0.

e) The ratio of r_s to r_0 is obtained by finding the value of r where the magnitude of the attractive adhesion force is maximum.

This can be determined by finding the separation r where the derivative of the potential energy equation with respect to r is equal to zero.

The value of r_s represents the separation at which the attractive force between the atoms is strongest.

f) The value of F_max between the two atoms can be obtained by taking the negative derivative of the Lennard-Jones potential energy equation with respect to r and evaluating it at r=r_s.

This will give you the magnitude of the maximum attractive adhesion force between the atoms.

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