an mg-24 atom weighs 23.985 amu. if an atom weighs 1.566 x 10-22 g, how many atomic mass units does it weigh?

Answer:

Explanation:

Answer:

Hydrocarbons. Alkanes. Alkenes. Alkynes.

Cyclic Hydrocarbons.

Aromatic Hydrocarbons.

Alcohols.

If there is sufficient fossil fuel, we will cope by utilizing it in a responsible and sustainable manner while actively transitioning towards alternative energy sources. Coping with the abundance of fossil fuels requires a multi-faceted approach that considers environmental, economic, and social aspects.

To cope effectively, we can:

1. Promote energy efficiency: Invest in technologies and practices that minimize energy waste and maximize efficiency in all sectors, including transportation, industries, and buildings.

2. Transition to renewable energy: Increase the adoption of renewable energy sources such as solar, wind, hydro, and geothermal power. This reduces our reliance on fossil fuels and mitigates environmental impacts.

3. Implement policy measures: Enact policies that incentivize the use of renewable energy, discourage excessive fossil fuel consumption, and promote sustainable practices.

4. Invest in research and development: Support and fund research efforts aimed at developing cleaner and more sustainable energy technologies, such as advanced battery storage, hydrogen fuel cells, and carbon capture and storage.

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mol = 3.79 × 10^24/6.02 × 10^23 = 6.296 mol

mass = 6.296 × 23 = 144.808 grams

The body of scientific knowledge is based on different Observations (Option C).

Observations in the scientific method are fundamental because it is the first step to raising scientific questions that may be explained through plausible hypotheses. Subsequently, hypotheses must be tested by experimental procedures.

In conclusion, the body of scientific knowledge is based on different Observations (Option C).

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Answer:

The adhesive is made up of two different layers.

The lower layer is made up of vertically aligned nanotubes.

The upper layer is made up of curly, spaghetti-like, nanotubes.

Answer:

B,C,D

Explanation:

Answer:

If you are looking for the answer, for the question.

Earthquakes trigger tsunamis when the seismic activity causes the land along fault lines to move up or down

When you are sweating or shivering, you are exhibiting your limits of tolerance.

The human body can only withstand certain amounts of environmental stress. A key element in defining the body's tolerance limitations is temperature. Only a small range of temperatures is tolerable for the human body, and both hypothermia and hyperthermia can be fatal. Air pressure and humidity both have an impact on how well the body can withstand the environment. Altitude sickness and dehydration are both caused by low air pressure and high humidity, respectively. The body's capacity to endure the environment can also be impacted by pollution and chemical exposure. While exposure to radiation can result in cancer and genetic damage, noise pollution can also induce stress and hearing loss. Overall, a complex interplay of many environmental influences affects the human body's tolerance thresholds.

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delete please .....................................

Answer:

liquid junction potentials

when a cell contains a boundary between two electrolytic solutions of different composition or concentration, a liquid junction potential is developed due to the "diffusion of the various components at characteristic rates in the boundary zone."

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The general gas equation, commonly referred to as the ideal gas law, represents the state of a fictitious ideal gas through an equation. Here the mass of helium gas required to pressurize 86 L tank to 201 atm is 2561.8 g.

According to the ideal gas law, the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of one gram of an ideal gas.

The ideal gas equation is given as:

PV = nRT

n = PV / RT

56°C = 329 K

n = 201 × 86 / 0.08206 × 329 = 640.45 mol

Molar mass of 'He' = 4.00 g / mol

Mass =  640.45 × 4.00 = 2561.8 g

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Answer:

Exercises Example 6. How Many Moles Of Carbon Atoms And How Many Carbon Atoms Are Contained In 1.0 G Of C,H,OH

Explanation:

The mass of the propane that would have the same number of carbon atoms is  0.63 g.

We know that we can be able to obtain the number of the carbon atoms by the use of the simple stoichiometry of the reaction as we have it in the question that we have been asked here.

We can see that we have the molar mass of the ethanol as we can see as 46 g/mol. We have to obtain the number of moles of the ethanol that we have in the compound as follows;

Number of moles = 1 g/ 46 g/mol = 0.022 moles

Number of the carbon atoms that we have is; 0.022 moles * 2 * 6.02 * 10^23 = 2.6 * 10^22 atoms

Now the number of the grams of the propane that we have is;

2.6 * 10^22  = x * 3 * 6.02 * 10^23

Where x is the number of moles present

x =  2.6 * 10^22 / 1.806 * 10^24

x = 1.44 * 10^-2 moles

x = 0.0144 moles

Given that the molar mass of the propane is 44 g/mol

mass  =  0.0144 moles * 44 g/mol

Mass = 0.63 g

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K20

K = 1+

0 = 2-

K/0 = 1/2

the answer is K:O = 1:2

Answer:

THE NEW VOLUME OF THE NITROGEN GAS AT 500 mmHg IS 20 L

Explanation:

We will solve the question by using the Boyle's law equation;

P1V1 = P2V2

Write out the values of the variables involved in the question

P1 = 1000 mmHg

V1 = 10 L

P2 = 500 mmHg

V2 = ?

Substitute the values into the equation, we have;

V2 = PIV1 / P2

V2 = 1000 * 10 / 500

V2 = 10000 /500

V2 = 20 L

The new volume of the nitrogen gas at a pressure of 500 mmHg is 20 L.

Answer:

A circle graph, or a pie chart, is used to visualize information and data. A circle graph is usually used to easily show the results of an investigation in a proportional manner. Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger.

Explanation:

In short, bar graphs are better to keep track of data over long periods of time, and circle graphs are better when you are trying to visualize a specific set of data.

Circle graph can be also be called pie chart, which  is more widely used. It is usually made up of a circle, divided into parts or pies. In the divided parts, it is used to differentiate between different data.

Bar charts on the other hand are like graphs having both x and y axis. It is used to represent data with respect to the height of the graph. Each data is divided into different smaller parts on the graph.

Example of what they look like is attached below.

First one is bar chart while the second is a circle graph

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Answer:

it would be an element because its an element

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

\(^{127}_{53} I\)

53 protons and electrons and 74 neutrons.

Explanation:

Hello!

In this case, since the nuclide symbol of an isotope is represented by putting the atomic mass as a prefixed superscript and the number of protons as a prefixed subscript, for I-127 we have:

\(^{127}_{53} I\)

Now we realize this isotope have 53 electrons and protons and the following number of neutrons:

\(neutrons= 127-53=74\)

Notice this isotope has about the same molar mass of the average iodine atom.

Best regards!

Some types of solids that are insoluble in water are:

Many solids are insoluble in water, meaning they do not dissolve in water to a significant extent. Here are some examples of common solids that are generally insoluble in water:

Metals: Most metals, such as gold, silver, platinum, and copper, are insoluble in water.

Non-Metallic Elements: Many non-metallic elements, such as carbon (in the form of graphite or diamond), sulfur, phosphorus, and iodine, are insoluble in water.

Metal Oxides: Some metal oxides, particularly those of less reactive metals, are insoluble in water. Examples include aluminum oxide (Al2O3), iron(III) oxide (Fe2O3), and lead(II) oxide (PbO).

Metal Carbonates: Most metal carbonates are insoluble in water. Examples include calcium carbonate (CaCO3), lead(II) carbonate (PbCO3), and copper(II) carbonate (CuCO3).

Metal Sulfides: Many metal sulfides are insoluble in water. Examples include lead(II) sulfide (PbS), silver sulfide (Ag2S), and mercury(II) sulfide (HgS).

Insoluble Salts: Certain salts have limited solubility in water. Examples include silver chloride (AgCl), lead(II) iodide (PbI2), and calcium sulfate (CaSO4).

It's important to note that while these solids are generally insoluble in water, they may exhibit some solubility to a small extent. The solubility of a solid in water can vary depending on factors such as temperature, pressure, and the presence of other solutes.

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Answer:false

Explanation:

Solution :

Partition coefficient Kd

\($=\frac{\frac{\text{mass of caffeine in } CH_2Cl_2}{\text{volume of } CH_2Cl_2}}{\frac{\text{mass of caffeine in water}}{\text{volume of water}}}$\)

= 9.0

A). 1 x 200 mL extraction :

Let m be the mass of caffeine in the water

Mass of caffeine in \($CH_2Cl_2$\) = 100 - m

\($\frac{\frac{100-m}{200}}{\frac{m}{200}} = 9.0$\)

\($=\frac{100-m}{m} = 9.0$\)

\($= 10 m = 100$\)

m = 10

Mass remaining in coffee = m =  10 mg

B). 2 x 100 mL extraction :

First extraction :

Let \($m_1$\) be the mass of caffeine in the water

Mass of caffeine in \($CH_2Cl_2$\) = \($100-m_1$\)

\($\frac{\frac{100-m_1}{100}}{\frac{m_1}{200}} = 9.0$\)

\($=\frac{100-m_1}{m_1} = 4.5$\)

\($ 5.5 \ m_1 = 100$\)

\($m_1$\)  = 18.18

Mass remaining in coffee = \($m_1$\) =  18.18 mg

Second Extraction :

Let \($m_2$\) be the mass of caffeine in the water

Mass of caffeine in \($CH_2Cl_2$\) = \($18.18-m_2$\)

\($\frac{\frac{18.18-m_2}{100}}{\frac{m_2}{200}} = 9.0$\)

\($=\frac{18.18-m_2}{m_2} = 4.5$\)

\($ 5.5 \ m_2 = 18.18$\)

\($m_2$\)  = 3.3

Mass remaining in coffee = \($m_2$\) =  3.3 mg

Answer:

it develops from the womb

Answer:

outer cells of the blastocyst

Explanation:

on edg:)

Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:

Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)

The molar mass of MgCl₂ is 95.21 g/mol.

First, we need to calculate the number of moles of MgCl₂ formed:

Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂

Moles of MgCl₂ = 34.52 g / 95.21 g/mol

Moles of MgCl₂ = 0.363 mol

According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:

Moles of HCl = 2 * Moles of MgCl₂

Moles of HCl = 2 * 0.363 mol

Moles of HCl = 0.726 mol

To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.

Number of molecules of HCl = Moles of HCl * Avogadro's number

Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol

Number of molecules of HCl = 4.37 x 10^23 molecules

Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.

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Answer:

increases

Explanation: As we move from left to right the atomic number increases due to which radii

Distance 11.143 ft or thereabouts is Distance roughly how far the tree extends from its tip to its base.

Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting and ending position.

We obtain a quadratic equation by simplifying and expanding the left side:

2y^2 - 288y + 144 = 0

The quadratic formula is used to solve for y, and the result is: y = [288 (2882 - 4(2)(144)]

/(2(2))

y = [288 ± √58368]

y = 0.857 ft or /4 y = 84 foot

The only viable answer is: y 0.857 ft since y cannot be higher than 12 ft (the whole height of the tree).

The result of changing this number for y in the equation x + y = 12 ft is: x + 0.857 ft = 12 ft x 11.143 ft

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A.THERMOMETERS SEISMIC WAVES

The given hydrocarbon CH₃CH₂I is ethyl iodide or iodoethane. It is a colourless flammable chemical compound which is produced by heating ethanol with iodine and phosphorous.

The organic compounds which is composed of only carbon and hydrogen atoms are known as hydrocarbons. Methane, ethane, propane, etc. are some examples of hydrocarbon.

Here iodoethane is a saturated hydrocarbon. The hydrocarbons in which the 'C' and 'H' atoms are bonded through single bonds are called saturated hydrocarbons. In unsaturated hydrocarbons 'C' and 'H' atoms are connected through double or triple bonds.

Alkanes belongs to the class of saturated hydrocarbons whereas Alkenes and Alkynes are unsaturated hydrocarbons.  The ability of hydrocarbons to bond themselves is defined as the catenation.

The expanded structural formula of iodoethane is CH₃ - CH₂ - I . The formula of each hydrocarbons will be different from one another.

Thus the name of CH₃CH₂I  is ethyl iodide or iodoethane.

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When you put it into a table and separate the variables, you'll get 0.80 molecules.

Answer: KCl

That is the correct answer on pearson