What information about a molecule helps determine the type of intermolecular forces that will exist between molecules?
A) atomic number
B) period number
C) molecular polarity
D) molecular mass

Answer:

The periodic table was created to organize the elements and provide physical and chemical properties, also to group with elements like it.

Hope this helps

The compound that have been shown in the image that is attached here is an alkane.

A hydrocarbon molecule known as an alkane only contains the atoms of carbon (C) and hydrogen (H). It is a member of the wider group of organic chemicals known as paraffins or alkanes. Alkanes are defined by the presence of single covalent connections between carbon atoms, which create a structure resembling a chain.

Because they have the most hydrogen atoms bound to each carbon atom, alkanes are noted for their poor reactivity and are categorized as saturated hydrocarbons.

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If a radioactive isotope has a half-life of 400 million years, it will take 400 million years for 50% of the material to change to the daughter product.

How long it takes for half of the radioactive atoms to decay is known as the half-life of the isotope. A radioactive isotope's half-life is the amount of time it takes for half of the parent material to decay to the daughter product. It's worth noting that a half-life isn't a fixed amount of time for each radioactive isotope.

The following formula can be used to calculate the amount of radioactive isotope remaining after a given period of time:

t=ln(N₀/N) / λ

Where:

For this problem, we need to solve for the time (t) at which 50% of the radioactive isotope has decayed:

0.5N₀ = N₀ e^(-λt)

0.5 = e^(-λt)

t = ln(0.5) / (-λ)

We know that the half-life of this isotope is 400 million years, which means that λ is equal to:

ln(2) / (400,000,000 years)

λ = 0.00000000017 / year

Substituting that value into the formula:

t = ln(0.5) / (-0.00000000017 / year)

t ≈ 400,000,000 years

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The mass of H₂SO₄ that must dissolved in 1.08 liters of solution to make 2.69M solution is 271.52 grams.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

In this case,

The volume of the solution is 1.08 L.

The required molarity of the substance is 2.69M.

So,

we can write,

Molarity = Moles/Volume

Moles = Molariyt x volume

Moles =2.69 x 1.03

Moles = 2.77

Moles = Mass required/molar mass.

Molar mass of H₂SO₄ is 98 g/mol.

Putting values,

2.77=Mass required/98

Mass required = 271.52 grams.

So, 271.52 grams of H₂SO₄ is required to make 2.69M solution.

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The leaching process is a technique used to extract soluble components from a solid material by selectively dissolving them into a suitable solvent.

Four factors that leaching is dependent on are:

Two factors to consider when selecting the solvent are:

It is important to pre-treat the solid before leaching to remove any impurities or contaminants that may hinder the leaching process. Pre-treatment can involve processes such as crushing, grinding, or washing to increase the surface area available for contact with the solvent and to remove any surface coatings or layers that may inhibit the extraction.

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Answer:

Yellowing of leaves

Explanation:

Involves the colour change in leaves whereby less amount of chlorophyll is produced

Answer:

burning, cooking, milk becoming curd, rusting of iron

Answer:

The Answer is gonna be d. They assume the shape of container

This is the right Answer

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Let's see that the STP represents the conditions for the temperature of 0°C (273 K) and for the pressure of 1 atm.

We have this initial data and a volume of 3.20 x 10 ^(2) mL. To solve this problem, we need to use the ideal gas formula:

where T is temperature, P is pressure, and V volume. Subindex 1 is the initial data and subindex 2 is the final data.

We want to find the final volume, so clearing for V2 in the formula, we're going to obtain:

And the final step is replacing the data that we have, where the final data is 425.0 K and 3.50 atm (remember that the volume must be in liters, 1 liter is 1000 mL, so 3.20 x 10^2 mL is 0.32 L):

The answer is that the new volume of the sample of helium would be 0.14 L.

Answer:

Book on Table

Car at the Hilltop

Falling Objects

Skydiver

Hammering a Nail

Dam Water

Roller Coaster

Stretched Rubber Band

Simple Pendulum

Compressed Spring

Battery

Flashlight

Exothermic Chemical Reaction

Burning of Oil, Gas and Coal

Wind Turbine

Explanation:

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1. The coefficient (green) is 45

2. The exponent (yellow) is 9

To convert from giga grams (Gg) to grams (g), the following coversion scale can be use:

1 Gg = 10⁹ g

With the above convesion scale, we can convert 45 Gg to g as follow

1 Gg = 10⁹ g

Therefore,

45 Gg = 45×10⁹ g

Thus, 45 Gg is equivalent to 45×10⁹ g. Hence, we can conclude as follow:

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No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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Answer:

Explanation:

the arrow indicates a chemical reaction has occurred mean that

Answer:

Atomic mass

Explanation:

I got it right on my test

Answer:

D.

Explanation:

I assume its D because the controlled variable is what is kept the same throughout the experiment.

The enthalpy change of displacement (ΔH) is the amount of heat released or absorbed when a metal reacts with an aqueous solution of an ion of another metal to form a solid compound.

The metal reactivity series, on the other hand, is a list of metals in order of decreasing reactivity, based on their tendency to lose electrons and form positive ions. While there is some correlation between the two, the enthalpy change of displacement is not directly correlated with the metal reactivity series. This is because the enthalpy change of displacement depends on several factors, such as the nature of the metal and the ion, the ionic charge, and the temperature and concentration of the solution. In general, metals that are more reactive have a greater tendency to form positive ions and release heat (exothermic reaction) during displacement reactions. However, other factors, such as the size and charge of the ion, can also play a role in determining the ΔH of a displacement reaction. So, while the metal reactivity series provides a useful guide to the relative reactivity of different metals, it is not a direct indicator of the enthalpy change of displacement for a given reaction.

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1. The absolute error is 128.76 g

2. The relative error is 0.99

3. The percentage error is 99%

From the question given above, the following data were obtained:

Absolute error = |Accepted - Measured|

Absolute error = |130 - 1.24|

Absolute error = 128.76 g

Relative error = Absolute error / accepted value

Relaive error = 128.76 / 130

Relative error = 0.99

Percenrage error = relative error × 100

Percenrage error = 0.99 × 100

Percenrage error = 99%

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Answer:

My best guess would be organic compounds, good luck.

The term "organic" best describes the compound with chains of carbon atoms.  

Option (D) is correct.

Organic compounds are characterized by containing carbon-hydrogen (C-H) bonds and often involve complex carbon-based structures. These compounds are typically associated with living organisms and are essential building blocks of life.

The presence of chains of carbon atoms indicates a molecular structure based on carbon-carbon bonds, which is a fundamental feature of organic compounds. In contrast, inorganic compounds generally lack carbon-hydrogen bonds and are typically simpler substances. Terms like "polar," "ionic," and "inorganic" do not specifically capture the essence of a compound consisting of carbon chains.

Therefore, the term "organic" accurately represents the nature of the compound and its connection to carbon-based chemistry and living systems.

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The question is incomplete. The complete question is:

A compound contains chains of carbon atoms.

Which term best describes this compound?

A) polar

B) inorganic

C) ionic

D) organic

Answer:

D

Explanation:

when you boil water in a pot and put a lid or something meatal over it when it reaches a certain temperature it gets steamy and during that it will get hyper and run around in circles and will go up but since the meatal or glass lid is there it will stop it and you will see water droplets on the inside.

Answer:

d

Explanation:

Answer:

On heating, calcium reacts with hydrogen, halogens, boron, sulfur, carbon, and phosphorus.

Explanation:

Electron configuration: 1s22s22p63s23p64s2

Atomic number: 20

Atomic weight: 40.078

Oxidation state: +2

Answer:

Explanation:

As per being a Group 7 element, it would gain one electron, which changes it's charge to 1-. It is therefore negatively charged, having a full outer shell of 8, having its electronic structure to be at 2,8,8.

The amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

To calculate the molarity of Kool Aid desired, we need to determine the number of moles of Kool Aid powder and sugar in the package. Since the molecular formula for sugar is C12H22O11, we can calculate its molar mass as follows:

Molar mass of C12H22O11 = (12 * 12.01) + (22 * 1.01) + (11 * 16.00)

= 144.12 + 22.22 + 176.00

= 342.34 g/mol

Given that the package contains 4.25 grams of Kool Aid powder, we can calculate the number of moles of Kool Aid powder using its molar mass:

Number of moles of Kool Aid powder = Mass / Molar mass

= 4.25 g / 342.34 g/mol

≈ 0.0124 mol

Similarly, for the sugar, which has a molar mass of 342.34 g/mol, we can calculate the number of moles of sugar using its mass:

Number of moles of sugar = Mass / Molar mass

= 192.00 g / 342.34 g/mol

≈ 0.5612 mol

Now, to calculate the molarity of the desired Kool Aid solution, we need to determine the volume of water. Given that 1.06 quarts is equal to 1 liter, and we have 2.00 quarts of water, we can convert it to liters as follows:

Volume of water = 2.00 quarts * (1.06 liters / 1 quart)

= 2.12 liters

To find the molarity, we use the formula:

Molarity (M) = Number of moles / Volume (in liters)

Molarity of Kool Aid desired = (0.0124 mol + 0.5612 mol) / 2.12 L

≈ 0.286 M

To prepare 65 mL of the desired molarity, we can use dilution calculations. We need to determine the volume of concentrated solution and the volume of water needed.

Let's assume the concentration of the concentrated Kool Aid solution is C M. Using the dilution formula:

(C1)(V1) = (C2)(V2)where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Given that C1 = C M and V1 = V mL, and we want to prepare a final volume of 65 mL (V2 = 65 mL) with a final concentration of 0.286 M (C2 = 0.286 M), we can rearrange the formula to solve for the volume of the concentrated solution:

(C M)(V mL) = (0.286 M)(65 mL)

V mL = (0.286 M)(65 mL) / C M

So, the amount of concentrated solution needed is (0.286 M)(65 mL) / C M, and the amount of water needed is 65 mL minus the volume of the concentrated solution.

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The maximum wavelength of a photon that can break a hydrogen bond in a protein molecule is about 1.24 micrometers.

To calculate the maximum wavelength of a photon that can break a hydrogen bond in a protein molecule, we can use the equation E=hc/λ, where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength of the photon. We know that the energy required to break a hydrogen bond is about 0.1 eV. Converting this to Joules, we get 1.602 x 10^-19 J. Plugging this value into the equation and solving for λ, we get λ = hc/E = (6.626 x 10^-34 Js x 3 x 10^8 m/s) / 1.602 x 10^-19 J = 1.2398 x 10^-6 m, or approximately 1.24 micrometers. Therefore, the maximum wavelength of a photon that can break a hydrogen bond in a protein molecule is about 1.24 micrometers.

To determine the maximum wavelength of a photon capable of breaking a hydrogen bond in a protein molecule with an energy requirement of 0.1 eV, we can use the energy-wavelength relationship. This relationship is given by the formula E = (hc)/λ, where E is energy, h is Planck's constant (6.626 x 10^-34 Js), c is the speed of light (3 x 10^8 m/s), and λ is the wavelength. By rearranging the formula, we can find the maximum wavelength as λ = (hc)/E. Plugging in the values, we get λ ≈ 1.24 x 10^-5 m or 12.4 µm. Therefore, the maximum wavelength of a photon that can break the hydrogen bond is approximately 12.4 µm.

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Answer:B

Explanation:

Answer:This chapter begins the first where we will look at matter on a microscopic scale.  Matter is made of small particles of atoms or molecules.  There are three common states of matter, solid, liquid and gas.  A gas and a liquid will change shape to fit the shape of their container.  A gas will change volume to fit the volume of the container.

Explanation:

In general, solids are denser than liquids, which are denser than gases. . The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other.   Their vibration is related to their kinetic energy.  In the solid the particles vibrate in place.

Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container. The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other.

Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other.  In most cases, there are essentially no attractive forces between particles.  This means that a gas has nothing to hold a specific shape or volume.

(A fourth state of matter, called plasma, exists when a gas becomes ionized. Plasma exists inside stars and in interstellar gases.)

we are given the pH of the solution as 3.17 are we are required to find the [H₃O+]

we know that :

pH = - log[H₃O+]

-pH = log[H₃O+]

10⁻ᵖᴴ = 10ˡᵒᵍ[ᴴ₃ᴼ⁺]

10⁻ᵖᴴ = [H₃O+]

therefore:

10⁻³.¹⁷ = [H₃O+]

6.8x10⁻⁴ M = [H₃O+]

therefore the [H₃O+] is 6.8x10 minus 4 Molar

In the asthenosphere, density and temperature are the primary contributors to convection currents.

What exactly is the Earth's asthenosphere?

The weaker, denser layer below the lithospheric mantle is known as the asthenosphere. It is between 62 miles and 410 kilometers (100 miles) below the surface of the Earth. Because of the asthenosphere's extreme heat and pressure, rocks begin to weaken and partially melt, turning semi-molten.

What is the short definition of the asthenosphere?

Located under the lithosphere, the asthenosphere is a region of the Earth's mantle that is thought to be significantly hotter and more fluid than the lithosphere. Between 100 km (60 miles) and 700 km (450 miles) below the surface of the Earth is the asthenosphere.

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Answer:

3.75mole

Explanation:

Given parameters:

Mass of the carbon(C) = 45g

Unknown:

Number of moles of carbon  = ?

Solution:

The number of moles of a substance can be found using;

      Number of moles  = \(\frac{mass}{molar mass}\)  

Molar mass of carbon  = 12g/mol

    Number of moles  = \(\frac{45}{12}\)   = 3.75mole

Answer:

See explanation

Explanation:

We separate substances based on their important properties such as reaction to heat, solubility in water, magnetic properties, etc.

To separate sodium chloride and potassium trioxonitrateV, we need to heat the solution. KNO3 dissolves at a high temperature and crystallizes out as the solution is cooled.

Hence when we heat the solution, KNO3 dissolves, as we cool the solution, solid KNO3 crystals are obtained while NaCl remains in solution.  We have now separated the two salts in the solution.

Note that the solubility of NaCl is almost independent of temperature.

C. they may have a positive or negative charge

Explanation:

Observing a chemical and physical change in a substance can provide several benefits, including:

Understanding the nature of the substance: By observing chemical and physical changes, we can understand the properties of a substance and how it behaves under different conditions. This can help us predict how it will react in different situations and can inform decisions about how to handle it safely.

Identifying the presence of impurities: Chemical and physical changes can also indicate the presence of impurities or contaminants in a substance. This can be important in many different fields, including medicine, manufacturing, and environmental science.

Optimizing processes: By understanding the chemical and physical changes that occur in a substance, we can optimize processes to produce the desired results more efficiently. This can lead to cost savings and improved quality control in industries ranging from food and beverage to pharmaceuticals.

Developing new materials: Observing chemical and physical changes can also help scientists and engineers develop new materials with specific properties or characteristics. By manipulating the conditions under which a substance undergoes chemical and physical changes, new materials can be created with improved performance and functionality.

Answer:

c) Seasonal migration

Explanation:

Because A, B and C are all examples of structural adaptations. And seasonal migration is not something that is in an animals structure but is instinct.

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