Calculate the energy of a photon of radiation with a frequency of 8.5 x 10¹4 Hz
Use this calculator to submit your answer in a decimal form.

Answer:

its height relative to some reference point, its mass, and the strength of the gravitational field

Explanation:

Gravitational energy is the potential energy associated with gravitational force, such as elevating objects against the Earth’s gravity. The potential energy due to elevated positions is called gravitational potential energy.

The factors that affect an object’s gravitational potential energy are the following; its height relative to some reference point, its mass, and the strength of the gravitational field it is in. For instance, consider a wallet lying on a table, it has less gravitational potential energy than the same wallet lying on top of a taller cupboard, and yet lesser gravitational potential energy than a heavier wallet lying on the same table.

If an object lies at a certain height above the Moon’s surface, it has less gravitational potential energy than the same object lying at the same height above the Earth’s surface because the Moon’s gravitational force is weaker.

Answer:

3

Explanation:

last one? don't take my word though

Explanation:

the suns heat is related to nuclear fusion

Warm air rises at the equator and cold air sinks at the poles creating is B convection currents.

Convection can be described as the single or multiphase fluid flow which can take place spontaneously  as a result of the combined effects of material property heterogeneity  as well as the body forces on a fluid,  especially with density and gravity.

It should be noted that in case whereby Warm air rises at the equator and cold, there will be a phenonmenon in which the air sinks at the poles which will bring about the convection currents.

Therefore, option B is correct.

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Changing the concentration of the reactant does not affect the rate of the reaction.

In a zero-order reaction, the rate of the reaction remains constant regardless of changes in the concentration of the reactant. This means that doubling the concentration of the reactant will not affect the rate of the reaction.

This is because in a zero-order reaction, the reaction rate is determined solely by the concentration of the enzyme, and not by the concentration of the reactant.

Therefore, changing the concentration of the reactant does not affect the rate of the reaction.

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The reaction rate will remain the same when the concentration of the reactant doubles. So, the option is A.

In zero-order kinetics, the reaction rate is independent of the concentration of the reactant. This means that even if the concentration of the reactant doubles, the reaction rate will not change. Example of zero-order kinetics: The breakdown of alcohol in the liver follows zero-order kinetics. Regardless of how much alcohol is in the bloodstream, the liver can only process a certain amount per hour, so the breakdown rate remains constant.

Zero-order kinetics refers to a reaction where the rate of the reaction is independent of the concentration of the reactant. In enzyme kinetics, zero-order kinetics occurs when the reaction rate is limited by the rate of the enzymatic reaction itself rather than the concentration of the substrate.

Not all enzyme-catalyzed reactions follow zero-order kinetics, as some reactions may follow first-order or second-order kinetics, depending on the reaction mechanism and the concentration of the substrate.

In the given scenario, if the concentration of the reactant doubles, the reaction rate will remain the same since the reaction is following zero-order kinetics. Therefore, the option is A. remain the same.

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Answer:

Explanation:

Molarity = number of moles / volume

If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M

The molarity of the solution will be 7 M.

The total count of moles of solute per liter of a particular solution is known as a solution's molarity.

The volume of just an object is a measurement of how much space it takes up.

Molarity of the solution can be determined by the formula:

\(M_{1} V_{1} = M_{2} V_{2}\)

where, M = molarity of solution. V = volume.

Given data:

\(M_{1}\) = 3.50 M

\(M_{2}\) = ?

\(V_{1}\) = 550 mL

\(V_{2}\) = 275 mL

Now, put the value of given data in molarity equation.

\(V_{2} = M_{1} V_{1} /M_{2}\\V_{2} = (3.50 M) (550 mL) / (275 mL)\\V_{2} = 7 M\)

Therefore, the molarity of the solution will be 7 M.

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Answer:

Take the measuring cylinder and measure its mass, in grams, as accurately as possible. Take the measuring cylinder off the balance and add the water carefully. Put the measuring cylinder back on the balance. Measure and record the new mass . Repeat the procedure,  recording the volume and total mass, until the measuring cylinder is full. Then, for each volume calculate the mass of the liquid alone.Repeat steps 1 to 3  Draw a graph of mass of liquid against volume .  Calculate the density of each liquid from the gradient of its graph line.

Explanation:

Answer:

1. Na2CO3 + 2HCl --> 2NaCl + CO2 + H2O

2. 2NaOH + H2SO4 --> Na2SO4 + H2O

3. CaCO3 + 2HCl --> CaCl2 + CO2 + H2O

4. 4Na + O2 --> 2Na2O

Answer:

False.

Explanation:

Humans are made of matter too :)

dsg-d34-2sn

Explanation:

the new verge of 23 us 27b fub co+ sn + sno2

Answer:

Her speed is 6.8m/s.

Explanation:

K.E= 1/2mv²

or, 2543.2= 1/2×110×v²

or, 2543.2 = 55v²

or, 2543.2/55 = v²

or, 46.24 = v²

or, 6.8² = v²

v = 6.8 m/s

answer

6.8

explanation

k.e=1/2v^2

2543.2=55v^2

46.24=v^2

6.8^2=v^2

v=6.8

Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

When measuring data, precision and accuracy are two crucial considerations. Both precision and accuracy indicate how closely a measurement comes to the real value.

But accuracy also indicates how closely a measurement resembles a known or recognized value, while precision indicates how repeatable a measurement is, even if it is far from the acceptable value. Out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

Therefore, out of given data, all data is close to actual value, so all are precise but only first data is very much close to actual value so it is accurate.

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By create calibration curve.

What is calibration curve?

In many different disciplines, such as analytical chemistry and biochemistry, calibration curves are frequently utilized. A calibration curve is used to calculate the limit of detection and the limit of quantitation, as well as the concentration of an unknown material. The instrument response to a series of standard samples at various concentrations is used to produce the curve. To enable the prediction of unknown concentrations, the data are then fitted with a function.

A calibration curve can be used to figure out the concentration of an unidentified medication. By comparing these curves to data from known medications at different doses, researchers and developers can utilise them to establish where an unfamiliar compound plots. A spectrophotometer is used to collect absorbance for varied concentrations.

This method of identifying unknown substances can be advantageous to numerous industries. For instance, coffee roasting might make use of a calibration curve. A plot can be used by roasters to estimate a bean's caffeine spectrum. Gelatin's food colour content could be displayed on a calibration curve for the food industry.

Additional applications include

production of chemicals, plastics, paints, and cosmetics

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Answer:

B

Explanation:

Answer:

\(40 \times 1 = 40\)

Answer: 7.1

Explanation:

Answer:

True

Explanation:

Kinetic Energy Statement

Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.

Hope this helped!

❤️

The statement about elemental nickel used in the hydrogenation of polyunsaturated oils is also incorrect as it refers to a heterogeneous catalyst, not a homogeneous one.

They are always present in the same phase as the reactants.

They typically interact with reactants to form intermediates, which eventually react away to regenerate the catalyst.

The following statements are correct:

Homogeneous catalysts are always present in the same phase as the reactants.

They typically interact with reactants to form intermediates, which eventually react away to regenerate the catalyst.

The following statement is incorrect:

They function by furnishing an active surface upon which reactions can occur. (This is true for heterogeneous catalysts, not homogeneous catalysts.)

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Answer:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

Explanation:

It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...

The concentration of the diprotic acid equals 3.4 M

We'll begin by writing the balanced equation for the reaction.

H₂X + 2NaOH —> Na₂X + 2H₂O

From the balanced equation above,

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

MaVa / MbVb = nA/nB

(Ma × 25) / (1.95 × 87.42) = 1/2

(Ma × 25) / 170.469 = 1/2

Cross multiply

Ma × 25 × 2 = 170.469

Ma × 50 = 170.469

Divide both side by 50

Ma = 170.469 / 50

Ma = 3.4 M

Therefore, the concentration of the acid, H₂X is 3.4 M

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Answer:

The answer is sophisticated earthquake early-warning systems, increasingly accurate storm forecasting, and innovative flood risk and flood mitigation projects provide communities with the tools they need to respond to impending hazard events, and infrastructure design and engineering improvements help to reduce the damage suffered

Explanation:

I hope this helps

Answer:

C

Explanation:

The products have less potential energy than the reactants in an exothermic reaction.

The statement true about endothermic and exothermic reactions is the products have less potential energy than the reactants in an exothermic reaction.

Endothermic reactions absorb heat from the surrounding and cools the environment, but exothermic reactions release heat and make the environment warm.

Combustion is an exothermic reaction, and melting of ice is an example of an endothermic reaction.

Thus, the correct option is C.

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The chart is showing the position -time graph of the movement of ball. The x-axis represents the time of travel and y-axis represents the position of the ball with respect to the time.

The position - time graph is plotting the position of a moving object in with respect to different time. From this plot we can easily understand the displacement by an object. Similarly we can determine the speed of the object from the slope of the line.

The position is expressed in meters and the time is expressed in seconds. If the plot shows a linear curve, then the object is moving with constant speed.

Here, the position of the moving ball is given in  y-axis  0, 2.5 m, 6, 8 and 10 meters with respect to the time given in x-axis as 0 ,4,8,12 and 16 seconds.

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Answer:

sorting/classifying

Explanation:

.

The physical property that would make a mineral appropriate to use as an abrasive is hardness.

A mineral with a high level of hardness is able to resist being scratched or abraded, which makes it ideal for use in abrasive applications such as sandpaper. Some minerals that are commonly used as abrasives include diamond, corundum, and garnet. These minerals have a high level of hardness and are able to effectively remove material from a surface through the process of scratching or cutting. The choice of which mineral to use will depend on factors such as the type of material being worked on and the level of abrasiveness required.

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The quantity of heat released when when 15.7 g of benzene in the liquid phase at 50.0 °c is converted to solid benzene at 2.0 °c. molar mass of benzene is 11.37708 KJ.

Energy = nCp,liquid(T,bp - T₁) + nΔH + nCp,gas(T₂ - T,bp)

where

n is the number of moles

T,bp is the boiling point of benzene at 80.1°C

Cp,liquid = 134.8 J/mol·°C

Cp,gas = 82.44 J/mol·°C

ΔH = 87.1 J/mol

Energy = (3.12 moles)(134.8 J/mol·°C)(80.1°C - 75.1°C) + (3.12 moles)(87.1 J/mol) + (3.12 moles)(82.44 J/mol·°C)(115.1°C - 80.1°C)

Energy = 11,377.08 J

It smells pleasant and is quite combustible. Benzene swiftly disappears into the atmosphere. Its vapor can descend into low-lying locations since it is heavier than air. Benzene floats on top of water and barely slightly dissolves in it.

One of the fundamental petrochemicals, benzoene is a component of crude oil that occurs naturally. Benzene is categorized as an aromatic hydrocarbon because of the cyclic continuous pi bonds that exist between the carbon atoms. PhH is a common abbreviation. The stench near gas stations is partly caused by benzene, a colorless, extremely combustible chemical that has a sweet scent.

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A student takes 45.0 grams of N204 and combines it with 250mL of NaOH.

1. Name each compound.

2. State whether each compound bonds via ionic, covalent, or metallic

bonds.

3. Find the molarity of the final solution.

4. Identify whether the final solution is concentrated or dilute.

5. Identify the percent composition of oxygen in the final solution.

2 / 2

The compounds involved in the reaction are nitrogen dioxide (NO2) and sodium nitrite (NaNO2).

Nitrogen dioxide (NO2) is a covalent compound, while sodium nitrite (NaNO2) is an ionic compound.

To find the molarity of the final solution, we need to first determine the number of moles of NaOH used. The molarity (M) of a solution is defined as moles of solute per liter of solution. The formula to calculate molarity is:

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

The volume of the solution is given in milliliters (mL), so we need to convert it to liters by dividing by 1000:

Volume of solution = 250 mL / 1000 mL/L = 0.25 L

The number of moles of NaOH used can be calculated using its concentration (assuming it's a standard solution), and the volume used:

moles of NaOH = concentration x volume of NaOH in liters

We don't have the concentration of NaOH, but we know that the reaction between N2O4 and NaOH is a neutralization reaction. This means that the number of moles of NaOH used is equal to the number of moles of H+ ions produced by the dissociation of N2O4. Since N2O4 is a covalent compound, it does not dissociate completely in water. However, it does react with water to form nitrous acid (HNO2):

N2O4 + H2O → 2HNO2

Each mole of N2O4 reacts with two moles of NaOH, and produces two moles of H+ ions. Therefore, the number of moles of NaOH used is equal to half the number of moles of N2O4 used:

moles of NaOH = 0.5 x (45.0 g / 92.01 g/mol) = 0.2457 mol

Now we can calculate the molarity of the final solution:

Molarity = (moles of NaOH) / (volume of solution in liters) = 0.2457 mol / 0.25 L = 0.983 M

Therefore, the molarity of the final solution is 0.983 M.

To determine whether the final solution is concentrated or dilute, we need to compare its molarity to the molarity of a typical solution of NaOH. A typical solution of NaOH has a molarity of about 1 M. Since the molarity of the final solution is less than 1 M, we can say that it is dilute.

To find the percent composition of oxygen in the final solution, we need to determine the number of moles of oxygen in the solution and the total number of moles of all the elements in the solution.

From the balanced equation, we know that each mole of N2O4 produces two moles of NO2, and each mole of NO2 contains one mole of oxygen:

N2O4 + 2NaOH → 2NO2 + 2H2O

This means that the number of moles of oxygen in the solution is twice the number of moles of N2O4 used:

moles of O = 2 x (45.0 g / 92.01 g/mol) = 0.978 mol

To find the total number of moles of all the elements in the solution, we need to add the number of moles of Na, N, and H:

moles of Na = 0.2457 mol

moles