A student performed the experiement but varied the volumes used when weighing out the liquids. Will the differing volumes affect the outcome of the experiement

Answer:

they make tissue. form organ and whole body an i true..

Answer:

Oxygen has 8 neutrons

Explanation:

We know that cause the atomic number says how many protons does the element has, so in this case is eight, and in the mass number, we have the number of protons+neutrons, in this case is 16. Then, as we know that oxygen has eight protons with the atomic number, we would do 16-8 protons= 8 neutrons.

Check: Atomic number is 16= 8 protons + 8 neutrons

Room temperature should be 40 degree on given scale.

Given, in the new temperature scale,

The freezing point of water (\(T_{1}\) ) is 20° and

The boiling point of water (\(T_{2}\) ) is 80°.

We assume the room temperature is 25°C.

Let, T be the room temperature in the new scale.

[The freezing and boiling point of water in Celsius scale is 0° and 100° respectively]

We know,

\(\frac{T_{2}-T_{1} }{100-0} = \frac{T-25}{25}\)

⇒ \(\frac{80-20}{100} = \frac{T-25}{25}\)

⇒ \(T-25 = 15\)

\(T = 40\)°. (Ans)

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The lines in a line graph aid in the fairly early detection of trends, allowing the viewer to make predictions about the data that has not yet been recorded.These are appropriate for illustrating the data points since, given one variable, the other is simple to ascertain.

A line graph, often known as a line chart, is a visual representation of data that is continuously changing over time.

There are two axes. in a line graph, the occurrences and categories being compared throughout time are shown on the x-axis (abscissa), and the scale, which is a group of integers that reflects the data and is divided into equal intervals, is shown on the y-axis (ordinate).

Depending on the data, the graph's lines may either decline or ascend. It is practical to plot time graphs along the x/y axis since it shows the rise and fall of data points in great detail.

The reader may readily see changes in one group over time by choosing the appropriate scales for each axis (time on the x-axis and change is measured on the y-axis).

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Answer:

consisting of microscopically dispersed insoluble particles is suspended throughout another substance. However, some definitions specify that the particles must be dispersed in a liquid, and others extend the definition to include substances like aerosols and gels.

A condensation reaction is a type of chemical reaction that involves the joining together of two or more small molecules to form a larger molecule.

It is commonly referred to as a condensation reaction because it typically involves the release of a small molecule, such as water or alcohol, as a byproduct.

The term "condensation" is used to describe this process because it is analogous to the condensation of water vapor into liquid water, where smaller water molecules combine to form larger water droplets.

In a condensation reaction, two functional groups on different molecules react with each other, resulting in the formation of a covalent bond between them. This bond formation leads to the creation of a larger molecule, often referred to as a polymer.

The release of a small molecule as a byproduct is necessary for the reaction to occur, and it is commonly referred to as a "condensation product."

Condensation reactions play a crucial role in various biological processes, such as protein synthesis, DNA replication, and the formation of complex carbohydrates.

They are also widely utilized in organic synthesis to create a wide range of organic compounds, including polymers, pharmaceuticals, and natural products.

Overall, a condensation reaction is a chemical reaction that involves the combination of small molecules to form a larger one, accompanied by the release of a smaller molecule as a byproduct.

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The  pressure of the gas in the sample container connected to the manometer is 25.6 mmHg. First, we need to convert the height difference of the mercury levels from centimeters to millimeters. There are 10 mm in 1 cm, so the height difference is 3.41 cm x 10 mm/cm = 34.1 mm.

We need to find the pressure difference between the gas in the sample container and the atmospheric pressure. This can be found by subtracting the height difference of the mercury levels from the atmospheric pressure. 99.54 kPa - (34.1 mm / 760 mmHg/kPa) = 99.54 kPa - 0.045 = 99.495 kPa ,Now we can use the conversion factor of 1 mmHg = 0.133 kPa to convert the pressure difference from kilopascals to millimeters of mercury. 99.495 kPa x (1 mmHg/0.133 kPa) = 748.5 mmHg .

First, convert the atmospheric pressure from kPa to mmHg. 1 kPa is approximately equal to 7.50062 mmHg. So, 99.54 kPa × 7.50062 (mmHg/kPa) ≈ 746.99 mmHg. Convert the difference in mercury levels from cm to mm. 1 cm is equal to 10 mm. So, 3.41 cm × 10 (mm/cm) = 34.1 mm. The level of mercury in the arm connected to the atmosphere is 3.41 cm higher than the arm connected to the sample container, meaning the gas pressure is lower than the atmospheric pressure. Subtract the difference in mercury levels from the atmospheric pressure to find the gas pressure: 746.99 mmHg - 34.1 mm = 726.4 mmHg.
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mmg mmñm

Explanation:

no lo seeee123456789

surely scientists

are in a competition of inventing how many things one can

Explanation:

some scientist are interested in in biology some are in astrology and many more

scientist are are interested

Answer: 3.2

Explanation:

STP (Standard Temperature and Pressure):

At STP, 1 mole of an ideal gas will occupy a volume of 22.4 liters (Note: the new defined STP volume is 22.7 liters).

The volume is 77 L .

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

1.5 moles of oxygen at stp = 22.4 x 1.5 = 33.6 litres.

Therefore , number of moles of oxygen is : Now , we know volume of 1 mole of gas at S.T.P is 22.4 liters . Therefore , volume of 0.1 mole of oxygen at S.T.P is : Therefore , the volume of 3.2 gram atom of oxygen at S.T.P is 2.24 liters .

Helium is the largest, so that’s going to have the largest volume. Because at STP, volume was going to be equivalent to moles of gas.

Therefore, chemists introduced the concept of molar volume. Molar volume of a gas is defined as the volume of one mole of the gas. Thus, the molar volume is also the volume occupied by 6.02 x 1023 particles of gas. The molar volume of any gas is 22.4 dm3 mol–1 at STP or 24 dm3 mol–1 at room conditions.

oxygen gas

One mole of oxygen gas occupies 22.4 l volume at STP.

67.2 liters

The answer depends on the temperature and pressure. If the gas is at STP, THE 1 mole is 22.4 liters. 3 moles x 22.4 L/mol = 67.2 liters.

Well, assuming that the hydrogen gas is contained at STP , then the molar volume would be 22.7⋅3=68.1 L .

0.5 moles⋅22.4 L/mol=11.2 L , and so on.

The molar volume of any gas at S.T.P. is 22.4L .

So, the volume of an ideal gas is 22.41 L/mol at STP. This, 22.4 L, is probably the most remembered and least useful number in chemistry.

At STP, one mol of Ideal Gas occupies 22.4 L and one mmol of Ideal Gas occupies 22.4 mL.

The freezing point of the solution is -11.8 °C.

The boiling point of the solution is 103.31 °C.

To determine the freezing point of the solution, we can use the equation:

ΔTf = Kf * m

where:

ΔTf is the freezing point depression,

Kf is the cryoscopic constant (for water, Kf = 1.86 °C/m),

m is the molality of the solution (moles of solute per kilogram of solvent).

First, let's calculate the molality (m) of the solution:

Molar mass of ethylene glycol (C2H6O2):

C = 12.01 g/mol

H = 1.01 g/mol (x 6) = 6.06 g/mol

O = 16.00 g/mol (x 2) = 32.00 g/mol

Total molar mass = 12.01 g/mol + 6.06 g/mol + 32.00 g/mol = 50.07 g/mol

Number of moles of ethylene glycol (C2H6O2) = mass / molar mass

Number of moles = 30.8 g / 50.07 g/mol = 0.615 mol

Mass of water = volume x density = 96.6 mL x 1.00 g/mL = 96.6 g

Now, let's calculate the molality:

Molality (m) = moles of solute / mass of solvent (in kg)

Molality = 0.615 mol / 0.0966 kg = 6.36 mol/kg

Now we can calculate the freezing point depression (ΔTf):

ΔTf = Kf * m

ΔTf = 1.86 °C/m * 6.36 mol/kg = 11.8 °C

To find the freezing point of the solution, subtract the freezing point depression from the freezing point of pure water (0 °C):

Freezing point = 0 °C - 11.8 °C = -11.8 °C

To determine the boiling point of the solution, we can use the equation:

ΔTb = Kb * m

where:

ΔTb is the boiling point elevation,

Kb is the ebullioscopic constant (for water, Kb = 0.52 °C/m),

m is the molality of the solution (same value as calculated before: 6.36 mol/kg).

ΔTb = 0.52 °C/m * 6.36 mol/kg = 3.31 °C

To find the boiling point of the solution, add the boiling point elevation to the boiling point of pure water (100 °C):

Boiling point = 100 °C + 3.31 °C = 103.31 °C

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The Diels-Alder mechanism among a diene and a dienophile is a concerted reaction, because of this that bond breaking occurs simultaneously with bond forming.

To help the mechanism be triumphant, the diene have to have an electron liberating organization and the dienophile have to have an electron taking flight organization.

A concerted reaction is a form of chemical response where all of the bond-forming and bond-breaking steps arise concurrently, in a single step. In other phrases, all of the reactants come collectively and react to shape the products with none intermediate steps.

Concerted reactions also are referred to as pericyclic reactions due to the fact they contain the formation and breaking of bonds in cyclic transition states. these reactions comply with a specific set of rules referred to as the Woodward-Hoffmann guidelines, which describe the allowed and forbidden modes of overlap among the orbitals of the reactants and products. These reactions are often utilized in organic synthesis to create complicated molecules with excessive stereoselectivity and regioselectivity.

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Complete Question:

The Diels-Alder mechanism between a diene and a dienophile is _____, which means that bond breaking happens _____ as bond forming.

To help the mechanism succeed, the diene should have an _____ group and the dienophile should have an ______ group.

Answer: this looks like your homework

Explanation:if you want help you are going to have to ask a specific question instead of giving people your homework.

Answer:

Honestly I would search this up maybe there might be a pdf with the answers. Sorry chemistry isn't my thing:(

Explanation:

Denise ought to keep detailed record of the experiment to allow someone to do the same investigation and check the accuracy of results. Option D

The term experiment has to do with cause and effect relationships. We know that the cause is what leads to the effect if the process can be tested in a laboratory. The experiment that as performed by Denise was targeted at finding what time of the day is warmest.

From the results of the experiment, we can conclude that Denise ought to keep detailed record of the experiment to allow someone to do the same investigation and check the accuracy of results.

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True, naturally occurring amino acids are L-enantiomers.

The naturally occurring amino acids in proteins are L-enantiomers. This means that they have a left-handed configuration in their Fischer projections.

In a Fischer projection, the horizontal lines represent bonds that are coming out of the plane towards you, while the vertical lines represent bonds that are going into the plane away from you. The configuration of the molecule is determined by the arrangement of these bonds.

The L-enantiomers of amino acids have the amino group (-NH2) on the left side of the molecule, while the carboxyl group (-COOH) is on the right side of the molecule when viewed in a Fischer projection. This is in contrast to D-enantiomers, which have a right-handed configuration and are less common in naturally occurring amino acids.

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Answer:

1 .  2.393e+ 9

2. ???

3. 3.25e-6

Explanation:

2393 kg = 2.393e+9 mg

43.23 g = 4.323 dam

0.325 cm = 3.25e-6 km

(Note: I'm not 100% that these are correct, but I hope this helps you tho. ^^)

The maximum safe operating temperature the engineer should recommend for this reaction is approximately 1063.77 degrees Celsius.

To calculate the maximum safe operating temperature, we need to consider the dimensions of the vessel, the maximum safe pressure, and the amount of gas inside.

First, let's convert the dimensions of the vessel from centimeters to meters:

Width = 48.0 cm = 0.48 m

Height = 57.6 cm = 0.576 m

Next, we need to calculate the volume of the vessel:

Volume = π * (radius)^2 * height

The radius of the vessel can be calculated as half of the width:

Radius = 0.48 m / 2 = 0.24 m

Volume = π * (0.24 m)^2 * 0.576 m

Volume ≈ 0.099 m^3

Now, we can use the ideal gas law to determine the maximum safe operating temperature. The ideal gas law is given by:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Rearranging the equation to solve for T:

T = (PV) / (nR)

To calculate the number of moles, we can use the molar mass of carbon dioxide (CO2):

Molar mass of CO2 = 12.01 g/mol (for carbon) + 2 * 16.00 g/mol (for oxygen)

Molar mass of CO2 ≈ 44.01 g/mol

Converting the mass of carbon dioxide from kilograms to grams:

Mass of CO2 = 2.45 kg * 1000 g/kg

Mass of CO2 = 2450 g

Now, we can calculate the number of moles:

Number of moles = Mass of CO2 / Molar mass of CO2

Number of moles = 2450 g / 44.01 g/mol

Number of moles ≈ 55.67 mol

The gas constant R is approximately 8.314 J/(mol·K).

Now, we can substitute the values into the equation:

T = (3.40 MPa * 0.099 m^3) / (55.67 mol * 8.314 J/(mol·K))

T ≈ 1063.77 K

Converting from Kelvin to Celsius:

T ≈ 1063.77 °C

The maximum safe operating temperature that the engineer should recommend for this reaction is approximately 1063.77 degrees Celsius.

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Answer:

Hey mate.....

Explanation:

This is ur answer........

For example, the communications industry includes all of the physical and social systems that produce books, newspapers, magazines, radio and television broadcasts, billboard advertisements, Internet websites, telephones, and telecommunications, such as the GPS.

Hope it helps!

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Follow me! :)

K and L values for each substance are 108g and 18g, respectively.

Solubility is the formation of a new bond between solute molecules and solvent molecules. Solubility is the maximum concentration of solute that dissolves in a known concentration of solvent at a given temperature in terms of quantity.

We calculated the solubility of NaCl in 100g of water to be 36g.

Lead Nitrate solubility in 100g water = 54g

Determine the value of L:-

200Kg sodium chloride solubility = 36g

100kg Sodium chloride Solubility = \(\frac{36g}{100kg} *200kg\) = 18g

Determine the value of K:-

100Kg Lead Nitrate Solubility = 54g

200kg Lead Nitrate Solubility = \(\frac{54g}{100kg} *200kg\) = 108g

Solubility difference = solubility of K - solubility of L

Solubility difference = 108g - 18g = 90g

Thus, the 108g and 18g, are the values for K and L respectively.

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The molar mass of HA is approximately 168.48 g/mol.

To calculate the molar mass of HA, we need to use the balanced chemical equation for the reaction between HA and NaOH:

\(HA + NaOH\) → \(NaA + H2O\)

From the equation, we can see that 1 mole of HA reacts with 1 mole of NaOH to produce 1 mole of NaA. At the equivalence point of the titration,

\(moles of NaOH = (0.500 mol/L) * (0.0321 L) = 0.01605 mol\)

Since the initial solution was prepared by dissolving 2.70 g of HA in 100.0 ml of water, we can calculate the initial concentration of HA in units of moles per liter:

\(moles\ of HA = (2.70 g / molar\ mass\ of HA) = (0.0270 kg / molar\ mass\ of HA)\)

\(initial\ concentration\ of\ HA = moles\ of\ HA / (0.100 L) = moles\ of\ HA / 1000 mL\)

Setting the moles of NaOH equal to the moles of HA, we can solve for the molar mass of HA:

moles of NaOH = moles of HA

\(0.01605\ mol = (0.0270 kg / molar\ mass\ of HA) / 0.100 L\)

\(molar\ mass\ of\ HA = (0.0270 kg / 0.01605 mol) / 0.100 L = 168.48 g/mol\)

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The mass of sulfur \(S_8\) that would be contained in the same number of molecules as in 12 g of carbon would be 32 grams.

According to Avogadro, 1 mole of a substance contains 6.022 x \(10^{23\) atoms or molecules of the substance.

Recall that, mole = mass/molar mass

Thus, 12 g of carbon would be equivalent to:

12/12 = 1 mol

1 mol of carbon will contain 6.022 x \(10^{23\) atoms or molecules.

6.022 x \(10^{23\) atoms or sulfur molecules will also equal 1 mol sulfur \(S_8\).

The molar weight of sulfur is 32 g/mol

mass of 1 mol sulfur = mole x molar mass

                                 = 1 x 32

                                 = 32 grams

In other words, the mass of sulfur \(S_8\) that would be contained in the same number of molecules as in 12 g of carbon would be 32 grams.

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take a few cups of water in a pan and and heat it on a gas burner . the hot water , add some dark brown mixture . then add sugar and milk. sugar is a solute which dissolves in hot water to form a solution . after boiling put some more time , mixture is filtered through a tea - strainer . the prepared tea passes through the tiny holes of the tea - strainer and collects as of filtrate in the cup placed below. the used tea - leaves , being isoluble , collect as a Residue in the the tea - strainer .

〽hope it helps you ✅

The balanced equation with the corresponding coefficients is:

3Mg + N₂ -> Mg₃N₂

Hence, the correct choice is: A. 3,1,1

The balanced equation for the reaction of magnesium with atmospheric nitrogen to produce magnesium nitride is:

3Mg + N₂ -> Mg₃N₂

This equation indicates that 3 moles of magnesium (Mg) react with 1 mole of nitrogen gas (N₂) to form 1 mole of magnesium nitride (Mg₃N₂).

The coefficients in a balanced equation represent the relative amounts of each substance involved in the reaction. In this case, the coefficients indicate the stoichiometric ratios between the reactants and products.

For example, the coefficient of 3 in front of Mg means that 3 moles of Mg are required for the reaction to occur. The coefficient of 1 in front of N₂ indicates that 1 mole of N₂ is needed. Finally, the coefficient of 1 in front of Mg₃N₂ means that 1 mole of Mg₃N₂ is produced as a result of the reaction.

Therefore, the balanced equation with the corresponding coefficients is:

3Mg + N₂ -> Mg₃N₂

Hence, the correct choice is: A. 3,1,1

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The amount of sodium hydroxide in the solution is about 3.70 M.

To get the amount of sodium hydroxide in solution, we have to apply the following formula:

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

Given:

Volume of solution = 117.5 ml = 117.5 / 1000 = 0.1175 L

Mass of sodium hydroxide = 17.4 grams

We need to convert the mass to moles using the molar mass of sodium hydroxide to determine its moles. The molar mass of sodium hydroxide (NaOH) is:

Na: 1 atom * atomic mass = 1 * 22.99 g/mol = 22.99 g/mol

O: 1 atom * atomic mass = 1 * 16.00 g/mol = 16.00 g/mol

H: 1 atom * atomic mass = 1 * 1.01 g/mol = 1.01 g/mol

Total molar mass of NaOH = 22.99 + 16.00 + 1.01 = 40.00 g/mol

So, we can calculate the moles of sodium hydroxide:

moles = mass / molar mass = 17.4 g / 40.00 g/mol = 0.435 moles

Molarity (M) = moles / volume = 0.435 moles / 0.1175 L ≈ 3.70 M

As a result, the amount of sodium hydroxide in the solution is about 3.70 M.

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The amount of heat energy in joules required to raise the temperature of 7.40g of water is 526.35 Joules

The amount of energy is expressed according to the formula expressed as:

\(E = mc\triangle \theta\)

m is the mass of water = 7.40grams

c is the specific heat of water =  4.184 J/g⁰C

\(\triangle \theta = 46 - 29\\ \triangle \theta = 17^0\)

Substitute the given parameters into the formula:

\(E = 7.4 \times 17 \times 4.184\\E=526.3472Joules\)

Hence the amount of heat energy in joules required to raise the temperature of 7.40g of water is 526.35 Joules

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Answer:

The silicon sphere can be measured by scientists

Explanation:

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The reason why the silicon sphere is a better measurement than the original IPK is the fact that the sphere is measurable by scientists.

The silicon sphere is better given the fact that it is measurable and it is also related to some basic constants that occur in nature.

After the result has being determined and seen as reliable then there is usually little need to continue using it given that the definitions are not going to be based on the sphere.

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The number of moles of O₂ used to produce 4 moles of NO is 2 moles

First, shall write the balanced equation. This is given below:

N₂ + O₂ -> 2NO

From the balanced equation above,

2 moles of NO were obtained from 1 mole of O₂

With the above information, we can determine the number of moles of O₂ used to produce 4 moles of NO. This can be obtained as follow:

From the balanced equation above,

2 moles of NO were obtained from 1 mole of O₂

Therefore,

4 moles of NO will be obtain from = (4 × 1) / 2 = 2 moles of O₂

Thus, number of mole of O₂ used is 2 moles

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partial pressure of n2o in the gas mixture was found to be 143.6 kPa

what is partial pressure?

Each gas that makes up a mixture of gases has a partial pressure, which represents the pressure that would exist if that gas alone had filled the complete volume of the initial mixture at the same temperature. According to Dalton's Law, the partial pressures of the individual gases make up the overall pressure of a perfect gas combination.

A gas's partial pressure is a gauge of its molecules' thermodynamic activity. However, unlike liquids or gas mixtures, gases behave differently depending on their partial pressures when dissolving, diffusing, and reacting. This characteristic of gases often holds true for gas chemical reactions in biology.

As per the data give

Moles (o2) = 2.83 mol

Moles (n2o) = 8.41 mol

Total pressure = 192 kPa

so the total number of moles should be calculated

Total No.of moles = no of moles in  o2  + no of moles in n2o = 2.83 + 8.41 = 11.24 mol

mole fraction for n2o

Mole fraction = moles  of compound/ Total moles

Mole fraction for n2o = 8.41 / 11.24 = 0.748

so now calculate the partial pressure of n2o

pn2o = 0.748 192 kPa

pn2o = 143.6 kPa

therefore the partial pressure of the n2o was 143.6 Kpa

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