what is the frequency of light when the energy of a single photon is 2.23 × 10-21 j?

The equilibrium constant for the reaction 2SO2(g) + O2(g) → 2SO3(g) is Kc = 0.113.

This value is determined using the reaction quotient equation, which calculates the ratio of product concentrations to reactant concentrations at equilibrium.

The number of significant digits in the equilibrium constant is dependent on the number of significant digits in the concentrations of the reactants and products.

In this case, the concentration for each reactant and product is only known to two significant digits, so the equilibrium constant is also only known to two significant digits. As a result, the equilibrium constant for this reaction is Kc = 0.113.

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Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Oxide, or 159.6882 grams.

pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Answer

84.8485 g

Explanation

Initial temperature, T₁ = 148 °C

Final temperature, T₂ = 20.4 °C

ΔT = T₂ - T₁

ΔT = 20.4 - 148

ΔT = -127.6 °C

Since heat is released, i.e heat loss, then Q = -324.8 calories

specific heat of the lead bar, c = 0.0300 cal/g°C

Using Q = mcΔT, we can find m as shown below

The mass of the bar is 84.8485 g

The order of the radiations from longer wavelength to shorter wavelength is as follows:  Radio waves , microwave, infrared, visible light, ultraviolet, X-rays and gamma rays. In these order the blanks have to be filled.

Electromagnetic spectrum is the arrangement of radiations in the order of decreasing wavelength or increasing frequency. Frequency is the number of wave cycles per unit time.

All the electromagnetic radiations are transverse waves. Wavelength of an electromagnetic radiation is the distance between two consecutive crests or troughs or the waves.

As the wavelength increases frequency and energy of electromagnetic radiations decreases. The longest wave is radio waves.Shortest wave is gamma rays.

The given image of wave is from longer wavelength to shorter wavelength hence the radiations can be arranged as : Radio waves , microwave, infrared, visible light, ultraviolet, X-rays and gamma rays.

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Answer:

false

Explanation:

the pressure exerted by a gas or liquid can move in all directions whether the fluid is still, if it's moving at a constant speed or if it's changing speed!

Answer:

l guess c is the answer

Explanation:

it is true because in oxygen does not share any atoms with hydrogen

Answer:

A

Explanation:

taking test currently

Answer:

1.01x236/1.90

=125.4mL

Answer: A cooperative is a private business organization that is owned and controlled by the people who use its products, supplies or services. Although cooperatives vary in type and membership size, all were formed to meet the specific objectives of members, and are structured to adapt to member's changing needs. hope this helps. Can u give me brainliest

Explanation:

The organic product that you would obtain from the reaction of 2-methyl-1-propanol with CrO3, H2O, and H2SO4 is 2-methyl propanal (isobutyraldehyde).

What is 2-methyl-1-propanol?

2-Methyl-1-propanol (or isobutyl alcohol) is a primary alcohol with the chemical formula C4H10O. It is used as a solvent, an antifreeze, a paint remover, and in the manufacture of other chemicals.

What is CrO3?

Chromium trioxide, also known as chromic acid anhydride, is an inorganic compound with the chemical formula CrO3.

It is a powerful oxidizing agent that is highly corrosive and is used in organic synthesis, chromium plating, and other applications.

What is the product of the reaction?

When 2-methyl-1-propanol reacts with CrO3, H2O, and H2SO4, the product formed is 2-methyl propanal (isobutyraldehyde).

The reaction can be written as follows:

2-methyl-1-propanol + CrO3 + H2O + H2SO4 → 2-methylpropanal + H2CrO4 + H2SO4

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Answer:

They move at a rate of one to two inches (three to five centimeters) per year.

Explanation:

The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.

The mass percentage of carbon in the carbon dioxide is 27.0%.

One barrel of crude oil produces 322 kg of carbon dioxide, which is composed of carbon and oxygen. From the balanced chemical equation for the combustion of hydrocarbons, we know that one mole of carbon produces one mole of carbon dioxide. The molar mass of carbon is 12.01 g/mol, and the molar mass of carbon dioxide is 44.01 g/mol. Therefore, the mass percentage of carbon in carbon dioxide is:

This means that for every 100 g of carbon dioxide produced from the combustion of crude oil, 27 g of it is carbon. Since crude oil contains 84% carbon by mass, this suggests that the carbon in the crude oil is not being fully converted to carbon dioxide during combustion, and that other carbon-containing compounds are being produced as well.

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Thermodynamic tables are reference tables that provide important thermodynamic properties of substances, such as temperature, pressure, specific volume, enthalpy, entropy, and internal energy.

I can provide some guidance and key steps to help you solve the problem:

(a) Sketch the hardware and T-s diagram:

You will need to draw a schematic diagram that includes the main components of the refrigerant-ice-making system: compressor, condenser, expansion valve, and evaporator. Label the flow direction and indicate the heat transfer processes. The T-s (temperature-entropy) diagram will show the thermodynamic states of the refrigerant throughout the cycle, including the evaporator and condenser pressures.

(b) Determining the mass flow rate of the refrigerant:

To determine the mass flow rate of the refrigerant, you will need additional information such as the refrigeration capacity or cooling load of the system. The mass flow rate of the refrigerant can be calculated using the equation:

ṁ_refrigerant = Q / (h_evaporator - h_compressor)

where ṁ_refrigerant is the mass flow rate of the refrigerant, Q is the cooling load, and h_evaporator and h_compressor are the specific enthalpies at the respective points.

(c) Determining the mass flow rate of the potable water supply:

To determine the mass flow rate of the potable water supply, you will need to consider the energy requirement for producing ice and the amount of energy transferred per unit mass of water. The mass flow rate of the potable water supply can be calculated using the equation:

ṁ_water = Q_ice / Δh_water

where ṁ_water is the mass flow rate of the potable water supply, Q_ice is the energy requirement for producing ice, and Δh_water is the specific enthalpy rise of the water as it flows through the system.

It is important to note that these calculations require additional specific data and equations related to the properties of the refrigerant and water, as well as the efficiency of the components in the system. Consult the appropriate thermodynamic tables or use software tools for accurate calculations.

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Answer:

H2

Explanation:

Hydrogen gas isn't a compound but it is diatomic when found naturally hence the 2

The physical properties of aldehydes and ketones are governed by the presence of a carbonyl functional group. This functional group contains a carbon atom double-bonded to an oxygen atom, which imparts unique chemical and physical properties to aldehydes and ketones.

The polarity of the carbonyl group makes aldehydes and ketones highly reactive with nucleophiles, and it also affects their boiling points and solubility. The dipole-dipole interaction between the carbonyl group and neighboring molecules affects the boiling point of aldehydes and ketones, which increases as the size of the molecule increases. In general, aldehydes have lower boiling points than ketones because they have one fewer carbon atom, making them less polar and less likely to form strong intermolecular forces. Additionally, the presence of the carbonyl group increases the acidity of aldehydes and ketones, making them weak acids. Overall, the unique physical properties of aldehydes and ketones can be attributed to the presence of the carbonyl functional group.

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Answer:

the answer is radiation

0.0334 moles of H2O contain 4.02 × 1022 atoms of hydrogen.

To find out the number of moles of H2O that contain 4.02 × 1022 atoms of hydrogen, we will use Avogadro's constant and stoichiometry.

Avogadro's constant is a measure of the number of particles present in a mole of a substance. It has a value of 6.022 × 1023 particles/mol.

The stoichiometric ratio of hydrogen to water is 2:1. This means that 2 moles of hydrogen react with 1 mole of water. Water's molecular composition can be represented by the formula H2O.

Therefore, the number of moles of hydrogen atoms present in 4.02 × 1022 atoms of hydrogen is given by:

4.02 × 1022 atoms of hydrogen × 1 mol/6.022 × 1023 atoms = 0.0668 moles of hydrogen atoms

Since the stoichiometric ratio of hydrogen to water is 2:1, the number of moles of water that contains 0.0668 moles of hydrogen atoms is given by:

0.0668 moles of hydrogen atoms × 1 mol of water/2 moles of hydrogen atoms = 0.0334 moles of water

Therefore, 0.0334 moles of H2O contain 4.02 × 1022 atoms of hydrogen.

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Answer:  kilogram

Explanation:

meter - Length

kilogram - mass

pound - also mass but NOT the standard unit!

liter - Volume

Answer:

A, Animal-like protists are called protozoa. ... Like animals, they can move, and they are heterotrophs. That means they eat things outside of themselves instead of producing their own food

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, all amounts are the same. The correct option is option D.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample. There are so many formula for calculating mole. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Calculating the amount of a chemical in grams from moles is among the most often chemistry computations. You will employ the mole ratio of reactants to reagents when balancing equations.

Therefore, all amounts are the same. The correct option is option D.

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The pressure when the helium balloon is airborne at a volume of 120 m³ and a temperature of -60°C is approximately 0.726 atm.

To solve this problem, we can use the ideal gas law, which states that:

PV = nRT

P is the pressure

V is the volume

n is the number of moles of gas

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

First, let's convert the initial and final temperatures from Celsius to Kelvin:

Initial temperature (T1) = 20°C + 273.15 = 293.15 K

Final temperature (T2) = -60°C + 273.15 = 213.15 K

Next, we can set up two equations using the ideal gas law for the initial and final states:

P1 * V1 = n * R * T1

P2 * V2 = n * R * T2

Since the number of moles (n) and the gas constant (R) are constant, we can write:

P1 * V1 / T1 = P2 * V2 / T2

Now we can plug in the given values:

P1 * 3.0 m³ / 293.15 K = P2 * 120 m³ / 213.15 K

Simplifying the equation:

P1 / 293.15 = P2 / 213.15

Now we can solve for P2:

P2 = P1 * 213.15 / 293.15

Finally, we can substitute the initial pressure (P1) with the given value of 1 atm:

P2 = (1 atm) * 213.15 / 293.15

P2 ≈ 0.726 atm

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Answer:

C. and D. i think

Explanation:

The weather in an area is affected mostly by interactions between solar radiation, Earth's large ocean, diverse landscapes and motion in space.

Temperature, pressure, wind, humidity, and precipitation are known as the elements of weather and these factors are fundamental to describe the weather and climate of a particular region.

Weather and climate are influenced by interactions involving sunlight,  ocean, atmosphere, ice, landforms and living things. These interactions change with latitude, altitude, and local and regional geography, and all of which can affect oceanic and atmospheric flow patterns.

Factors that combine to influence the weather are solar radiation, amount of which changes with Earth's tilt, orbital distance from sun and latitude, temperature, air pressure and abundance of water.

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The smallest and least massive atomic particle is the electron, which is negatively charged.Due to the electron's extremely small mass, it is not counted inside the element's atomic number.

Although they are very small and possess a mass of 1/1850 of that of a protons or neutron, electrons carry a negative charge.Since they are so tiny, they do not, in reality, add to the weight of the atom.

These particles are frequently referred to it as subatomic particles since they are the building blocks of atoms.There are protons, neutrons, and electrons, three types of subatomic particles.Protons and electrons, two of a subatomic particles, each have an electrical charge of one or the other.

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Answer:

acid- base indicator.

Some examples of an acid-base indicator are:

Litmus paper.

Methyl red.

Red cabbage juice.

Bromothymol blue.

Methyl orange.

Phenolphthalein.