Which statement correctly describes how a landform is created?

A canyon is created when ice from a glacier slowly melts over time.

A delta is created when wind blows large amounts of soil toward the shore

A sand dune is created when an earthquake breaks large rocks into small particles.

A V-shaped valley is created when a fast-moving river carves steep sides into hills and mountains

Answer:

f = 0.67×10¹⁵ s⁻¹

Explanation:

Given data:

Frequency of light = ?

Wavelength = 4.50 ×10⁻⁷ m

Solution:

Formula:

Speed of light = wavelength × frequency

Speed of light = 3×10⁸ m/s

Now we will put the values in formula.

3×10⁸ m/s = 4.50 ×10⁻⁷ m × f

f =  3×10⁸ m/s  / 4.50 ×10⁻⁷ m

f = 0.67×10¹⁵ s⁻¹

Answer:

A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid donates a proton to a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ion

Explanation:

According to the A.P.E.X. glossary:

A conjugate acid is the form a base takes after it gains a hydrogen ion (or proton), and a conjugate base is the form an acid takes after it loses a hydrogen atom (or proton).

Answer:

1C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)

Explanation:

In general equation combustions where all carbon produce CO₂ and all hydrogen H₂O we must begin the balance with these two species:

_C₆H₁₂O₆(s) + _O₂(g) → _CO₂(g) + _H₂O(l)

If sugar is 1, CO₂ and H₂O must be:

1C₆H₁₂O₆(s) + _O₂(g) → 6CO₂(g) + 6H₂O(l)

Thus, C and H are balanced. In the right side we have 12 oxygen from CO₂ + 6 oxygen from H₂O = 18 oxygen

In the left there are 6, thus, O₂ must provide 12 oxygens, thus:

And this is the balanced reaction

2.3 moles of sulfuric acid H2SO4 is equal to 225.58 g12. Therefore, you have 225.58 g of sulfuric acid H2SO4.

Sulfuric acid is used in various concentrations in the manufacture of fertilizers, pigments, dyes, drugs, explosives, detergents, and inorganic salts and acid.

It is also used in mineral processing, oil refining, wastewater processing, and chemical synthesis. In one of its most familiar applications, sulfuric acid serves as the electrolyte in lead–acid storage batteries.

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Answer:

Explanation:

The absorbed sunlight drives photosynthesis, fuels evaporation, melts snow and ice, and warms the Earth system. Solar power drives Earth's climate. Energy from the Sun heats the surface, warms the atmosphere, and powers the ocean currents.

Answer:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

Explanation:

Electronic configuration:

Fe₂₃ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

Abbreviated electronic configuration:

Fe₂₃ = [Ar] 3d⁶4s²

Properties of iron:

Iron is soft, bright white metal.

Its symbol is Fe, atomic number is 26 and atomic mass is 55.85 amu.

It is present in group 8 of periodic table.

It is used to make the steel.

It is malleable and ductile used to make the sheets.

It is good conductor of heat and electricity because of moveable electrons that can easily move from one to another atom.

Its density is 7.87 g/cm³.

Given :

There are 0.090 moles of sugar (C₁₂H₂₂O₁₁) in the average can of soda.

To Find :

How many sugar molecules would this be ?

Solution :

We know, in 1 mole of any compound their are \(6.022\times 10^{23}\) molecules of that compound.

So, number of molecules in 0.090 moles of compound is :

\(n = 0.090 \times 6.022 \times 10^{23}\\\\n = 5.42\times 10^{22}\)

Therefore, number of molecules in 0.090 moles of compound is \(5.42 \times 10^{22}\) .

The speed the object is traveling at, given the time from 4 to 6 seconds as shown in the graph is 2 m/s

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

The speed of the object at the given time can be obtain as follow:

Speed = change in distance / change in time

Inputting the various parameters, we have:

Speed of object = 4 / 2

Speed of object = 2 m/s

Thus, we can conclude that the speed of the object is at 2 m/s at the given time.

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The names of the covalent compounds are:

a. Selenium dioxide

b. Silicon tetraiodide

c. Diarsenic pentoxide

d. Tetraphosphorus trisulfide

a. The compound SeO2 is named selenium dioxide. It consists of one selenium atom bonded to two oxygen atoms.

b. The compound SiI4 is named silicon tetraiodide. It contains one silicon atom bonded to four iodine atoms.

c. The compound As2O5 is named diarsenic pentoxide. It consists of two arsenic atoms bonded to five oxygen atoms.

d. The compound P4S3 is named tetraphosphorus trisulfide. It consists of four phosphorus atoms bonded to three sulfur atoms.

In summary, the names of the covalent compounds are:

a. Selenium dioxide (SeO2)

b. Silicon tetraiodide (SiI4)

c. Diarsenic pentoxide (As2O5)

d. Tetraphosphorus trisulfide (P4S3)

What are the names of the following covalent compounds?

a. Name the compound SeO2.

b. Name the compound SiI4.

c. Name the compound As2O5.

d. Name the compound P4S3.

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There are several forms of energy that can be used to generate heat, other than electrical energy. These are chemical, solar and geothermal energy.

1. Chemical Energy: Chemical reactions can release heat as a byproduct. For example, burning wood, coal, or natural gas can produce heat energy.

2. Solar Energy: The sun emits radiation in the form of infrared waves, which can be absorbed by surfaces and objects, thereby heating them up.

3. Geothermal Energy: Heat generated from within the Earth's core can be harnessed and used for heating purposes.

Now, let's discuss the processes of conduction, convection, and radiation, which are all ways that heat can be transferred from one object or substance to another.

1. Conduction: This process involves the transfer of heat through direct contact between two objects. For example, if you touch a hot stove, heat will transfer from the stove to your hand through conduction.

2. Convection: This process involves the transfer of heat through the movement of fluids or gases. For example, if you boil water on a stove, the heat energy is transferred through the water via convection.

3. Radiation: This process involves the transfer of heat through electromagnetic waves, which can travel through a vacuum. For example, the sun's radiation can be absorbed by surfaces on Earth, causing them to heat up.

In summary, there are several forms of energy that can be used to generate heat, and heat can be transferred through conduction, convection, and radiation.

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Answer: 1.5 x 10 24

Explanation:

One mole of NaCl contains 6.022 x 1023 NaCl formula units

In 2.5 moles of NaCl there will be basically 5 moles of ions as per the given data.

A material created by joining two or more distinct elements chemically in science.

A compound in chemistry is a material comprised of two or more separate chemical elements mixed together in a certain proportion.

Chemical connections that are challenging to break are created when the elements interact with one another.

2.5 mol of NaCl contains 5 moles of ions. This is due to the fact that 1 mol of NaCl contains 2 mol of ions, so you must multiply the molecular weight of the molecule by two to obtain the number of ions.

Thus, the answer is 5 moles.

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Answer:

Garlic is sure healthy, but it is still not proven that garlic can help to prevent coronavirus.

Explanation:

Hope it helps :))

NO₂ is the empirical formula of an oxide of nitrogen containing 69.9% of nitrogen.

An chemical equation is a structure's chemical formula that only specifies the ratios of the elements it comprises and not the specific number or atom arrangement. This would be the compound's element with the greatest whole number ratio.

Atomic mass of :

N = 14 g/mol

O = 16 g/mol

Pick up 100 g of the substance for analysis.

Therefore, the mass of each component in the compound.

N = 30 g

O = 70 g

Let's determine the moles present in each element:

N = (30 g/14 g/mol) = 2.14 mol

O = (70 g/16g/mol) = 4.38 mol

Divide by a mole of 2.14 all over.

N = (2.14/2.14) = 1

O = (4.38/2.14) = 2

The compound's molecular formula is thus (NO₂)n, and its empirical formula is NO₂, where n is the number of hypothetical molecules that make up the real molecule.

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An extremely efficient enzyme has a small KM and a large kcat.

The conversion rate at the lowest substrate concentration is measured in kcat/km. This interpretation is accurate. kcat/Km is a good indicator of an enzyme's effectiveness since it takes into account both the enzyme's maximum rate, kcat, and its affinity for its substrate (Km).The turnover number, or the number of molecules that may be created per second per active site, of an enzyme is provided by the formula k c a t / kM.Because the substrate concentration is almost usually much greater than the Km, in many situations, enzymes are only better when they have a larger kcat. It seems disingenuous to me to use the ratio when this is plainly the case, yet it still happens much too frequently. It could serve as a useful benchmark when compared to enzymes in particular situations.

complete question:An extremely efficient enzyme has a _____ KM and a _____ kcat.

A) small; small

B) small; large

C) large; large

D) large; small

E) kcat and KM do nothing to predict the efficiency of an enzyme

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The volume of 0.450 M KNO3 solution containing 0.600 moles of KNO3 is approximately equal to 1333.3 milliliters.

Concentration of the solution in molarity is defined as the number of moles of solute dissolved per liter of solution. The formula for molarity is given as follows:Molarity (M) = \frac{Moles of solute (n) }{ Volume of solution in liters (V)}.

The volume of a solution containing a given amount of solute can be calculated if the molarity is known. The formula for volume is given as follows:V =\frac{ n }{ M}

Given: Molarity (M) = 0.450 MMoles of solute (n) = 0.600 moles

We are to calculate the volume of the solution in milliliters.Volume of solution in liters (V) = \frac{n }{MV }= \frca{0.600 moles }{ 0.450 MM} = 1.3333 liters.

As we have calculated the volume of the solution in liters, we need to convert it into milliliters to get the final answer.1 liter = 1000 millilitersV in milliliters = 1.3333 liters * 1000 mL/liter = 1333.3 milliliters

Therefore, the volume of 0.450 M KNO3 solution containing 0.600 moles of KNO3 is approximately equal to 1333.3 milliliters.

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The nucleus is not a fundamental subatomic particle that forms elements. A subatomic particle is a component of an atom that exists naturally. Option D  is correct.

An atom is a complex structure that is made up of many subatomic particles. The subatomic particles are divided into two categories: fundamental and composite particles. A composite subatomic particle is made up of smaller fundamental particles. On the other hand, a fundamental subatomic particle is a particle that cannot be further divided into smaller particles. In addition, fundamental particles are the building blocks of atoms, whereas composite particles are created by combining two or more fundamental particles. So, the following are fundamental subatomic particles: Electrons, Protons, Neutrons

Therefore, the nucleus is not a fundamental subatomic particle that forms elements. Option D  is correct.

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Answer:

Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and  If the data shows pronounced trends or reveals relations between variables, a graph should be used.

Explanation:

literally bro i had the same answer for my actual project for edge

Answer: Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and  If the data shows pronounced trends or reveals relations between variables, a graph should be used.

Explanation:

Answer:

A trait is a specific characteristic of an organism. Traits can be determined by genes or the environment, or more commonly by interactions between them. The genetic contribution to a trait is called the genotype.

Explanation:

if not then its a feature,

Answer:

Half-life = 28.8 years

Explanation:

The radioactive decay of an atom follows the equation:

Ln[A] = -kt + ln[A]₀

Where [A] is actual amount of isotope after time t; k is decay constant and [A]₀ initial amount of isotope

Solving for k:

Ln[0.393g] = -k*10yrs + ln[0.500]

-0.2408 = -k*10yrs

0.02408yrs⁻¹ = k

Half-life, is:

Half-life = ln 2 / k

Half-life = ln 2 / 0.02408yrs⁻¹

Half-life = 28.8 years

The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

Formula:

radioactive decay follows first-order kinetics,  

k = \(\frac{1}{t}ln\frac{a}{x}\)

Given:  

a = initial amount = 0.5 g  

x = amount of isomer after 10 years = 0.393 g  

t= time   = 10 years

Solution:  

k =  \(\frac{1}{10}ln\frac{0.5}{0.393}\)

   = 0.02408  

k = \(\frac{0.693}{t/2}\)  

T(1/2) = half-life time

= \(\frac{0.693}{k}\)

=   \(\frac{0.693}{0.02408}\)

= 28.78 years.

Thus, The isotope \(38Sr^{90}\) is one of the extremely hazardous species in the residues from nuclear power generation. The strontium in a 0.500-g sample diminishes to 0.393 g in 10.0 yrs, the half-life is - 28.78

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Answer:

They are irreversible

Explanation:

This is because it cannot be separated by physical means

Answer:

copper cathodes are normally referred to when talking about copper. Cathode is the purest form of copper and is the feedstock used to produce copper wire, cable, sheet, strip, tube, etc.

Explanation:

Answer:

it would be b

Explanation:

because when the roller coaster is going downhill it is moving faster so that means there is potential energy becoming kinetic energy because kinetic energy is made from movement

Answer:  1

Explanation: Because it is not moving

The specific heat of olive oil (2 J/g·°C) is less than that of water (4.18 J/g·°C). This indicates that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

To describe the specific heat of olive oil compared to water, we can use the given information that it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C.

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius (or Kelvin).

In this case, we can calculate the specific heat of olive oil by dividing the amount of heat (420 J) by the mass (7 g) and the temperature change (30°C):

Specific heat of olive oil = (Amount of heat)/(Mass * Temperature change)

                          = 420 J / (7 g * 30°C)

                          ≈ 2 J/g·°C

Comparing this specific heat value to the specific heat of water (which is approximately 4.18 J/g·°C), we can conclude that the specific heat of olive oil (2 J/g·°C) is less than the specific heat of water. This means that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

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How can you describe the specific heat of olive oil compared to water if it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C?

Energy as the ability to do work.

What is energy?

Energy has been defined as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work. People use energy to walk and for bicycle, to move cars along roads and boats through water, to cook food on stoves, to light our homes and offices, to manufacture products.

There are different forms of energy, which may include:

These forms of energy can be grouped into two general types;

Explanations

1. This is called convection.

2. You are using chemical energy and converting it to thermal (heat) energy.

3. Kinetic energy is the important factor

4. A hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or exemplified by the odors of gasoline. Examples of hydrocarbons are coal, petroleum, natural gas and tar. They are used as energy sources.

5. Radioactive waste. These materials can remain radioactive and dangerous to human health for thousands of years.

6. Mercury.

7. The energy of the sun is the original source of most energy used on Earth.

8. Heat is released and this heat expended allows work to be done.

9.

10.

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A calorimetry experiment may be used to directly estimate the enthalpy of combustion of magnesium. The following is an outline of the procedure:

Set up a calorimeter: To measure the heat emitted during the interaction of magnesium with oxygen, a bomb calorimeter or a constant-volume calorimeter can be employed.

Prepare a magnesium sample: A weighted magnesium sample is inserted in the calorimeter.

Start the process: Oxygen is supplied into the calorimeter, and the magnesium-oxygen reaction is started. Exothermic reactions release heat into the calorimeter.

Measure the temperature change: A thermometer or a temperature probe is used to measure the temperature change in the calorimeter.

Determine the enthalpy of combustion: The following equation is used to calculate the enthalpy of combustion:

ΔH = q/n

The heating value of a material, generally a fuel or food, is the amount of heat created when a specific amount of it is burned. The calorific value is the total amount of energy produced as heat when a material completely burns with oxygen under normal circumstances. The enthalpy of combustion is the change in enthalpy of a system when one mole of a material is entirely burned in oxygen or air at a specific temperature.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Vicky and Omar mix the unknown oxide with water and then add universal indicator to the solution. The color changes to orange then, the oxide formed must be a weak acid.

Indicator

The substance that indicates visibly the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution by typically through a color change is known as an indicator. The last point is demonstrated by a physical modification of the reaction or by the addition of an extra reagent, both of which are referred to as indicators.

Thus, they mix it with water and then add universal indicator to the solution. The color changes to orange the oxide formed must be a weak acid.

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Answer:

Mass = 43.45 g

Explanation:

Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. To find the mass of the substance, we need to multiply the volume occupied by the substance.

Mass = Density x Volume

Mass = 7.9 g/cm^3 (5.5 cm)^3

Mass = 43.45 g

Among the 4 given statements, option D: The value of Kw shows that water is a weak acid is the incorrect statement. Kw is ion product constant.

The ion product constant (Kw) is the product of the concentrations of hydrogen ions (H⁺) and hydroxide ions (OH⁻) in aqueous solution. It is used to measure the acidity or basicity of a solution, with a Kw of 1.0 x 10⁻¹⁴ at 25 °C for pure water. The value of Kw changes with temperature and is a measure of the strength of the solvent, indicating whether it is a stronger acid or base.

The value of Kw (ion product constant for water) is a measure of the strength of the self-ionization of water, which can be represented by the equation H2O ⇌ H⁺ + OH⁻. The fact that Kw has a very small value (1.0 × 10⁻¹⁴) indicates that the self-ionization of water is a very weak reaction.

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