Which functional group is shown below?

Answer:

Its letter A

Explanation:

bilatnimobahougbahokaugduga

Garden forks were originally made of wood, but the majority are now made of forged carbon steel or stainless steel. Hence, option A is correct.

Metals are opaque, lustrous elements that are good conductors of heat and electricity.

A garden fork is used similarly to a spade in loosening and turning over soil.

Its tines allow it to be pushed more easily into the ground, and it can rake out stones and weeds and break up clods, it is not so easily stopped by stones, and it does not cut through weed roots or root-crops.

Garden forks were originally made of wood, but the majority are now made of forged carbon steel or stainless steel.

Hence, option A is correct.

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Answer:

Boiling both samples of water

Explanation:

while Boiling both samples of water construct a heating curve for each this helps you I dentify the purity of the samples the heating curve of the pure water has sharp Boiling point while the impure does not have

I consists of only one naturally occurring isotope with 74 neutrons, but Te has multiple isotopes. Option C. is correct

A spectrometer is a scientific instrument used to separate and measure the spectral components of physical phenomena. A spectrometer is a broad term often used to describe an instrument that measures a continuous variable of a phenomenon whose spectral components are mixed in some way. It is a scientific instrument for analyzing the optical properties of luminous bodies or reflected light. This instrument measures these properties of light in specific parts of the electromagnetic spectrum. Various components are required for a spectrometer to function properly.

A spectrometer consists of three main components: an entrance slit, a diffraction grating, and a detector.

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Answer:

In a Lewis symbol, the symbol for the element is used to represent the atom and its core electrons. Dots placed around the atom are used to indicate the valence electrons. ... In 1916, Gilbert Newton Lewis, an American chemist, suggested that molecules were formed when atoms shared pairs of outer electrons.

Explanation:

Lewis structures show the electrons in the valence shell of atoms in molecules.

Lewis structures are representations of molecules. They consist of the symbol of the element and the valence electrons in the atoms. The electrons are often shown as dots.

The atoms in molecules could be lone pairs or bond pairs. The bond pairs are shown as two dots on an atom. Since lone pairs are localized on an atom, they are shown as dots on the symbol of the atom that contain them.

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Answer:

Answer above is incorrect

Explanation:

The true answers are B and E on Edge 2020

Hope this helps :)

Answer:

B and E

Explanation:

on edge hope this helps

Answer:

Acetic acid, CH3COOH , is a weak acid, because it is present in solution primarily as whole CH3COOH molecules, and very little as H+ and CH3COO− ions. Which furthermore indicates that acetic acid is weak, because strong ions ionize almost completely.

Answer:

weak acid

Explanation:

because it is present in solution primarily as whole CH3COOH molecules

Answer:

option no. C is correct

an electron in the 3d

Answer:

d

Explanation:

ionization takes place

Assuming gas temperature = 25, 3.2 g of a gas at 25°C occupy the same volume as 0.6266 g of CH4 at 17°C at constant pressure

The molecular mass of the gas : 842.1 g/mol

Given

3.2 g of gas

0.6266 g of CH4

Required

the molecular mass of the gas

Solution

Because V, P, and R are the same, from ideal gas law :

PV=nRT

n₁T₁=n₂T₂

n₂=moles CH₄= 0.6266 : 16 g/mol = 0.0392

T₁=25+273=298 K

T₂=17+273=290 K

mol of gas :

\(\tt n_1=\dfrac{n_2.T_2}{T_1}=\dfrac{0.0392\times 290}{298}=0.038\)

molecular mass :

\(\tt M=\dfrac{3.2}{0.038}=842.1\)

Answer:

Set A will change temperature the most quickly because gold is a very good conductor of heat and electricity.

Explanation:

Set A (solid gold chunk between flasks) would likely change temperature most quickly. Therefore, option A is correct.

The rate at which the temperature changes in the flasks will depend on the thermal conductivity of the materials used as the chunks between them. Materials with higher thermal conductivity transfer heat more efficiently, leading to faster temperature changes.

Therefore, Set A (solid gold chunk between flasks) would likely change temperature most quickly, followed by Set B (solid stone chunk between flasks), Set C (solid glass chunk between flasks), and finally Set D (solid rubber chunk between flasks).

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The correct answer is C. A television

Explanation:

Plasma is a particular state of matter that differs from liquid, solid, and gas because plasma is a gas but contains mainly particles that have lost their electrons or ions. This makes plasma have properties other states do not have. Additionally, plasma is now widely used in technologies, including televisions, this is because plasma is used in thousands of small containers to create the images in a Tv. This leads to high quality and precise images. Therefore, the commercial technology that commonly uses plasmas is a television.  

Answer:

c

Explanation:

edge

The concentration of H+ at equilibrium is 1.06 x 10^-4 M.

To determine the concentration of H+ in the weak acid solution at equilibrium, we need to use the percent ionization and the initial concentration of the weak acid.

Let's assume that the weak acid is denoted by HA. Then, we can write the equilibrium equation for the dissociation of HA as:

HA ⇌ H+ + A-

The equilibrium constant expression for this dissociation reaction is:

Ka = [H+][A-]/[HA]

Since the acid is weak, we can assume that the concentration of A- at equilibrium is approximately equal to the initial concentration of HA, since only a small fraction of HA is dissociated. Therefore, we can simplify the equilibrium constant expression to:

Ka = [H+]^2/[HA]

Rearranging this equation, we get:

[H+]^2 = Ka[HA]

Taking the square root of both sides, we get:

[H+] = sqrt(Ka[HA])

Now, we can plug in the values given in the problem:

Ka = unknown

[HA] = 0.00550 M

percent ionization = 8.20%

To find Ka, we can use the percent ionization:

percent ionization = [H+]/[HA] x 100%

8.20% = [H+]/0.00550 M x 100%

[H+] = 0.000451 M

Now, we can use the equation we derived earlier to find [H+] at equilibrium:

[H+] = sqrt(Ka[HA])

0.000451 M = sqrt(Ka x 0.00550 M)

Squaring both sides, we get:

Ka x 0.00550 M = (0.000451 M)^2

Solving for Ka, we get:

Ka = (0.000451 M)^2 / 0.00550 M

Ka = 3.70 x 10^-6 M

Finally, we can use the equation [H+] = sqrt(Ka[HA]) to find the concentration of H+ at equilibrium:

[H+] = sqrt(3.70 x 10^-6 M x 0.00550 M)

[H+] = 1.06 x 10^-4 M

Therefore, the concentration of H+ at equilibrium is 1.06 x 10^-4 M.

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The total number of oxygen atoms in the mixture is 3.49 x \(10^{23\) atoms.

To determine the number of oxygen atoms in the given mixture, we need to first calculate the number of oxygen atoms in each compound and then add them up.

So, 3.49x10^23 molecules of H2O will contain:

3.49x10^23 x 1 oxygen atom = 3.49x10^23 oxygen atoms

Number of oxygen atoms in 78.1g of CH3OH:

To find the number of moles of CH3OH, we can use its molar mass:

Therefore, 78.1 g of CH3OH will contain:

2.44 mol x 1 oxygen atom = 2.44 oxygen atoms

The molecular formula of CO2 is CO2, which contains 2 oxygen atoms.

To find the number of moles of CO2, we can use the ideal gas law:

Assuming standard temperature and pressure (STP), which is 1 atm and 0°C (273 K), we have:

n = (1 atm x 14.2 L) / (0.0821 L·atm/mol·K x 273 K) = 0.58 mol

Therefore, 14.2 L of CO2 will contain:

0.58 mol x 2 oxygen atoms = 1.16 oxygen atoms

Now we can add up the number of oxygen atoms in each compound to find the total number of oxygen atoms in the mixture:

3.49x10^23 + 2.44 + 1.16 = 3.49x10^23 + 3.6 = 3.49 x \(10^{23\)

Therefore, the mixture contains 3.49 x \(10^{23\) oxygen atoms.

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Answer: 13.02083 lbs

Explanation:

Based on the information provided, we can infer that the solution is either acidic or neutral since phenolphthalein turns colorless in acidic solutions and phenol red turns red in neutral or slightly basic solutions.

Therefore, the pH of the solution could be between 7 (neutral) and 4.5 (the pH at which phenolphthalein turns colorless). Without further testing or information, it is impossible to determine the exact pH of the solution.

Phenolphthalein turns colorless in acidic solutions (pH < 8.2) and phenol red turns red in acidic solutions (pH < 6.8). Since both indicators show a color change consistent with an acidic solution, the pH of the unknown solution is likely below 6.8.

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A solution of unknown pH was tested with two indicators: phenolphthalein and phenol red.

Phenolphthalein turns colorless and phenol red turns red. To determine the possible pH of the solution, let's examine the color changes of these two indicators at different pH levels.

Phenolphthalein is colorless in acidic solutions (pH < 8.2) and turns pink in basic solutions (pH > 8.2). Since it is colorless in your solution, the pH must be less than 8.2.

Phenol red turns yellow in acidic solutions (pH < 6.8), red in neutral solutions (around pH 6.8 to 8.0), and orange or pink in basic solutions (pH > 8.0). Since it turns red in your solution, the pH must be between 6.8 and 8.0.

Considering both indicators' color changes, the possible pH of your solution could be between 6.8 and 8.0.

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Answer:

Below!

Explanation:

To calculate the average acceleration you can use this formula....

     acceleration = finalvelocity - initial velocity / time

Because the object begins at rest we know that our initial velocity is 0 m/s

Our final velocity is 7 m/s, and our time is 0.1 seconds....

Plugging in our values :

     acceleration = 7m/s - 0.1 m/s / 0.1 s

                           = 7 m/s / 0.1s

                           = 70 m/s^2

This is already at the proper amount of sig figs so we're good to go!

Therefore the average acceleration of this object is 70 m/s^2

Hope this helps! Best of luck <3

\(\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{7-0}{0.1}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{7}{0.1}\)

\(\\ \sf\longmapsto Acceleration=70m/s^2\)

Answer:

Particle density is the volumetric mass of the solid soil. It differs from bulk density because the volume used does not include pore spaces. Particle density represents the average density of all the minerals composing the soil.

Hope that helps

Answer:

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

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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The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

Answer:

1. Nonmetal

2. Nonmetal

3. Covalent

Explanation:

CH4 is the chemical formula for the methane molecule in which four atoms of hydrogen is chemically bonded to one atom of carbon. Both carbon, which is the first element and hydrogen the second element are non-metals, and hence can only form a covalent bond.

A covalent bond is a type of chemical bond in which two atoms share their valence electrons. It occurs between two non metallic atoms. In this molecule, CH4, carbon and hydrogen share their valence electrons to form a covalent bond.

To calculate the heat transferred, we can use the formula:

Q = m * c * ΔT

Where:

Q is the heat transferred

m is the mass of the water

c is the  specific heat capacity of water

ΔT is the change in temperature

Given:

Mass of water (m) = 160 grams

Specific heat capacity of water (c) = 4.18 J/g°C

Change in temperature (ΔT) = 27°C - 18°C = 9°C

Substituting the values into the formula:

Q = 160 g * 4.18 J/g°C * 9°C

Calculating the expression:

Q = 6028.8 J

Therefore, the heat transferred is 6028.8 Joules.

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Answer:

FADH2 has a lower (less negative) redox potential than NADH does

Explanation:

Flavin Adenine Dinucleotide (FAD) and Nicotinamide Adenine Dinucleotide (NAD) are redox cofactors that play important functions for mitochondrial activity and cellular redox balance. Both coenzymes exist in two forms: an oxidized and a reduced, which are abbreviated as NAD/FAD and NADH/FADH2, respectively. These reduced forms (NADH and FADH2) are produced in the Krebs cycle during respiration. FADH2 has lower redox potential than NADH because FADH2 is only capable of activating 2 proton pumps, while NADH can activate 3 proton pumps during the electron transport chain, thereby FADH2 generates a minor number of ATP molecules than NADH.

The number of moles that can be produced from reacting 100.0 grams of chlorine with excess methane are 53.83 g CCl₄

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

The reaction is:

CH₄+ 4Cl₂ → CCl₄ + 4HCl

(100.0 g)/(70.9 grams/mole) = 1.4104 moles  Cl₂  

Now use the molar ratio of 4 to determine the moles of CCl₄

(1.41 moles Cl₂) x (1 mole CCl₄/4 mole Cl₂) = 0.35 moles CCl₄

Multiply moles CCl₄ by its molar mass to get grams

0.35 moles CCl₄) x (153.8g/mole) = 53.83 g CCl₄

Therefore, the moles of carbon tetrachloride (CCl₄) that can be produced are 53.83 g CCl₄.

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Answer:

B. Past changes in the climate have been faster than the changes we're seeing today

Explanation:

The Earth is warming abnormally quickly . Over the past century it has warmed roughly 10 times faster than the average increase in temperature after each ice age .

so the answer is B.Past changes in the climate have been faster than the changes we're seeing today.

Fusion Nuclear fusion is a response wherein two or greater atomic nuclei are blended to shape one or greater different atomic nuclei and subatomic debris. It

1. involves the splitting of nuclei

2. releases large amounts of energy

4. releases radiation as a waste product

5. occurs in nuclear power plants and is used to generate electricity.

Fusion reactions power the sun and other stars. In a fusion reaction,  light nuclei merge to form a single heavier nucleus. The technique releases electricity due to the fact the total mass of the resulting unmarried nucleus is much less than the mass of the two unique nuclei. The leftover mass becomes energy. The difference in mass between the reactants and merchandise is manifested as either the discharge or absorption of power.

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Answer:

2, 5, 6

Explanation:

edge 2023

Answer:

See attached.

Explanation:

The distance and the displacement are the measurements of the object that traveled. The distance traveled by the rolling car is 5 m and the displacement is 5 m downwards.

Distance has been the area covered by the object from the initial to the final point it has no directions. It estimates the points from where the object moved to reach the destination. The distance traveled is calculated as:

Distance = 20 m  - 15 m

D = 5 m

The displacement is the overall movement and change in the position of the object irrespective of the area covered. It is a vector quantity and is measured as:

D = Δx

D = X₂ - X₁

D = 20 m - 15 m

D = 5 m downwards

Therefore, the displacement of the car is 5 meters downwards and the distance is 5 meters.

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