What is activation energy

The reaction between strong acid and base which results in the formation of salt and water. This reaction is called Neutralization reaction.

Ex:- HCl + NaOH → NaCl + H2O.

Answer:

1 mole nitrogen produces 2 moles ammonia

How many moles you need for 155 mol ammonia?

155/2 moles

Explanation:

Molar mass is ratio of mass and the amount of same substance whose mass we have taken.Yes,I am confident in the identity of the unknown referencing % error.

In science, the molar mass (M) of a chemical compound is characterized as the proportion between the mass and how much substance (estimated in moles) of any example of said compound. The molar mass is a mass, not sub-atomic, property of a substance. The molar mass is a normal of many occurrences of the compound, which frequently shift in mass because of the presence of isotopes. Most usually, the molar mass is figured from the standard nuclear loads and is in this manner an earthly normal and a component of the overall wealth of the isotopes of the constituent particles on The planet. The molar mass is fitting for changing over between the mass of a substance and how much a substance for mass amounts.

Freezing point depression is a drop in the base temperature at which a substance freezes, caused when a more modest measure of another, non-unpredictable substance is added. Models incorporate adding salt into water (utilized in frozen yogurt creators and for de-icing streets), liquor in water, ethylene or propylene glycol in water (utilized in radiator fluid in vehicles), adding copper to liquid silver (used to make bind that streams at a lower temperature than the silver pieces being joined), or the blending of two solids like pollutions into a finely powdered drug.

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Answer:

yes because wet is water

Answer: Being a liquid, water is not itself wet, but can make other solid materials wet. Wetness is the ability of a liquid to adhere to the surface of a solid, so when we say that something is wet, we mean that the liquid is sticking to the surface of a material.

I bonds' primary advantage is that they shield your money's purchasing value from inflation. The amount that a dollar can buy decreases as prices rise throughout the economy. Does inflation remain high

An economy is a system of related production and consumption activities that ultimately determine how resources are divided within a society. The entirety of the goods and services produced and consumed satisfies the needs of those who live and work there.

Most of the following important life situations include economics: how policy is decided by the government. purchasing real estate prospects and monitoring the situation of the home market. being able to decide on a budget with knowledge

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Copper substance cannot be decomposed by a chemical change.

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The property of a star that relates to the amount of energy per unit time it is producing is its luminosity. Option a is correct.

Luminosity is the total amount of energy emitted by a star per unit time. It is a measure of the star's intrinsic brightness and is independent of its distance from us. Luminosity is usually expressed in units of watts (or solar luminosities), and is determined by the star's temperature, size, and composition.

Apparent brightness, on the other hand, is the amount of light received per unit area per unit time from a star and is dependent on both the star's luminosity and its distance from us. Apparent brightness is usually expressed in units of watts per square meter (or magnitude), and is determined by the star's luminosity and its distance from us.

Therefore, the property of a star that relates to the amount of energy per unit time it is producing is its luminosity. Hence Option a is correct.

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Answer:

B

Explanation:

Physical property can be observed without changing the property of substance for example it color, density, and etc.

Chemical property is what C explains as it is how it reacts with other substance

Answer:

physical properties are the can be seen

Explanation:

Example.one physical property of iodine is cluster like when it is solid

Answer:

In this reaction, hydrogen loses one electron. Hydrogen is oxidized, thus making it the reducing agent. An element that is oxidized is a reducing agent, because the element loses electrons, and an element that is reduced is an oxidizing agent, because the element gains electrons

Explanation:

The standard-state entropy change for the given reaction is -258.9 J/(mol·K).

What is entropy?

Entropy is a fundamental concept in thermodynamics and statistical mechanics that measures the degree of disorder or randomness in a system. It is a measure of the distribution of energy within a system and provides insight into the system's behavior and the direction of spontaneous processes.

To calculate the standard-state entropy change (ΔS°) for a reaction, we can use the standard molar entropies (S°) of the reactants and products. The formula is:

ΔS° = ΣnS°(products) - ΣmS°(reactants)

Where n and m are the stoichiometric coefficients of the products and reactants, respectively, and S° represents the standard molar entropy.

Using this formula and the standard molar entropies from reliable sources, we can calculate the ΔS° for the given reaction:

Reactants: 6 \(CO_2\)(g) + 6\(H_2O\)(l)

Products: 1 \(1C_6H_{12}O_6(s) + 6 O_2(g)\)

To calculate ΔS°, we need to know the standard molar entropies of each species involved. Let's assume the values as follows:

S°(\(CO_2\)) = 213.6 J/(mol·K)

S°(\(H_2O\)) = 69.9 J/(mol·K)

S°(\(C_6H_{12}O_6\)) = 212.1 J/(mol·K)

S°(\(O_2\)) = 205.0 J/(mol·K)

Now,

ΔS° = (1 * 212.1 J/(mol·K) + 6 * 205.0 J/(mol·K)) - (6 * 213.6 J/(mol·K) + 6 * 69.9 J/(mol·K))

Simplifying the equation:

ΔS° = 212.1 J/(mol·K) + 1230 J/(mol·K) - 1281.6 J/(mol·

ΔS° = 212.1 J/(mol·K) + 1230 J/(mol·K) - 1281.6 J/(mol·K) - 419.4 J/(mol·K)

Calculating the values:

ΔS° = -258.9 J/(mol·K)

Therefore, the standard-state entropy change (ΔS°) for the given reaction is -258.9 J/(mol·K).

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The number of grams of water that are produced from the moles of H₂ is 108.09 grams .

From the balanced chemical equation, we see that 2 moles of H₂ reacts to produce 2 moles of H₂O. Therefore, 1 mole of H₂ reacts to produce 1 mole of H₂O.

To find the number of moles of water produced from 6.00 moles of H₂, we can use the stoichiometry of the balanced chemical equation:

6.00 moles H₂ x (2 moles H₂O / 2 moles H₂) = 6.00 moles H₂O

So 6.00 moles of H₂ produces 6.00 moles of H₂O. To convert moles of water to grams, we need to use the molar mass of water:

Molar mass of H₂O = 2(1.008 g/mol) + 1(15.999 g/mol) = 18.015 g/mol

So, the mass of 6.00 moles of H₂O is:

6.00 moles H₂O x 18.015 g/mol = 108.09 g

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A partial pressure of oxygen of 70 mmHg near the tissues suggests that the blood is delivering oxygen to the cells.

The partial pressure of carbon dioxide most likely be around 43 mmHg, as this is the normal level of CO2 in the blood. If the level of CO2 is significantly higher or lower, it may indicate respiratory or metabolic issues. At this instant, with a partial pressure of oxygen in blood near the tissues at 70 mmHg, we can conclude that the blood is oxygen-rich and is delivering oxygen to the tissues. In this case, the partial pressure of carbon dioxide in the blood would most likely be 35 mmHg. This is because lower partial pressures of CO2 typically correspond with higher partial pressures of O2, indicating that oxygen exchange with tissues has occurred and that carbon dioxide, a waste product, is being removed from the body.

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The sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

The force exerted by a gas on specific area is known as gas pressure..

As we know, (P₁ V₁) /(T₁) = (P₂V₂) /(T₂)

Given, P₁ is the initial pressure (452 torr); V₁ is initial volume (32.2 mL)

T₁ is initial temperature in Kelvin (30 °C + 273.15 = 303.15 K)

P₂ is final pressure (452 torr); V₂ is final volume (what we want to find)

T₂ is the final temperature in Kelvin (-70 °C + 273.15 = 203.15 K)

Now, V2 = (P₁ V₁ T₂) / (P2 T₁)

V₂ = (452 torr x 32.2 mL x 203.15 K) / (452 torr x 303.15 K)

V₂ ≈ 18.5 mL

Therefore, the sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

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The equation for this reaction is

\(\text{Mg}+\text{O} \longrightarrow \text{MgO}\)

This means that for every mole of magnesium consumed, 1 mole of magnesium oxide is produced.

So, the answer is 0.094 moles.

It's important to know that the reaction must have the total mass involved before and after due to the law of conservation of mass. This means that the total mass number of the left side of the reaction must be equal to the right side. So, we have the following

Notice that 235 is the mass number of U, 1 is the mass number of the neutron, X represents the mass number of the unknown element, 141 represents the mass number of Ba, and 3 represents the mass number of three neutrons. This means X should have a mass number of 92, which is the element Kr.

Therefore, the mass number is 92 and the chemical symbol is Kr.

Sodium from Na3PO4(aq) could be prepared by electrolysis of the aqueous solution shown. Based on the provided options, the element that could be prepared by electrolysis of the aqueous solution shown

Potassium from KCl(aq)
Here's why:
- Sodium from Na3PO4(aq) and Nitrogen from AgNO3(aq) are not possible because these ions are more stable in solution than undergoing electrolysis.
- Sulfur from K2S04(ed) is not valid as the compound should be K2SO4(aq) and even then, it would produce oxygen at the anode instead of sulfur.
- Oxygen from H2SO4(aq) can be prepared through electrolysis, but this is not an element directly obtained from the compound.
Potassium from KCl(aq) can be prepared by electrolysis. During this process, K+ ions are reduced to potassium metal at the cathode, and Cl- ions are oxidized to chlorine gas at the anode.

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Answer:

Balanced equation:

The balanced chemical equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:

Ba(NO3)2(aq) + FeSO4(aq) → BaSO4(s) + Fe(NO3)2(aq)

Complete Ionic equation:

The complete ionic equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:

Ba^2+(aq) + 2NO3^-(aq) + Fe^2+(aq) + SO4^2-(aq) → BaSO4(s) + Fe^2+(aq) + 2NO3^-(aq)

Net Ionic equation:

The net ionic equation is obtained by cancelling out the spectator ions (ions that appear on both sides of the equation and do not participate in the reaction) from the complete ionic equation. The spectator ions in this case are Ba^2+ and 2NO3^-. The net ionic equation for the reaction between aqueous barium nitrate and aqueous iron(II) sulfate is:

Fe^2+(aq) + SO4^2-(aq) → BaSO4(s)

Answer:

Column A            \({}\)                                              Column B

1. CaS                   \({}\)                                              Calcium Sulfide

2. CaSO₄            \({}\)                                                Calcium sulfate

3. CaSO₃            \({}\)                                                 Calcium sulfite

Explanation:

1) Calcium sulfide is a compound formed between calcium, Ca, and sulfur, S, with a chemical formula of CaS. It forms cubic crystals similar to rock salt, and smells like rotten eggs

2) Calcium sulfate is a chemical compound consisting of calcium, Ca, and sulfate SO₄. It is found in nature in the hydrated form as the mineral gypsum

3)Calcium sulfite is a chemical compound formed between calcium, Ca and sulfite, SO₃ used to treat water and preserve food.

Answer:

the formula for calcium sulfite is CaSO3

the formula for calcium sulfate is CaSO4

the formula for calcium sulfide is CaS

Explanation:

Answer

449.4 grams

Explanation

The balanced chemical equation of the reaction is;

From the balanced chemical equation;

3 moles of H₂ reacted with 1 mole of N₂ to produce 2 moles of NH₃

Molar mass of H₂ = 2.016 g/mol

Molar mass of N₂ = 28.0134 g/mol

Molar mass of NH₃ = 17.031 g/mol

Convert mole to gram using the formula;

For 1 mole N₂

For 3 moles H₂

For 2 moles NH₃

We can now calculate, the mass of NH₃ that can be produced from 79.8 grams of H₂ as follows:

From the balanced equation we can say;

6.048 grams H₂ → 34.062 grams NH₃

∴ 79.8 grams H₂ → x grams NH₃

Therefore, 449.4 grams of Ammonia is produced if you started with 79.8 grams of Hydrogen.

Answer:

During the process of electrolysis, ions that are formed will get discharged to reform neutral atoms at the state of electrons, whereas the preferential meaning which in case one or more kind of cations and anions in the electrolyte, the one with the higher concentration or at a lower position activity will get discharged first.

Answer:

In the first one in a it is red light in b it is radio waves in c it is infrared radiation and d is UV radiation

Explanation:

The forms of radiation from the pairs listed that have longer wavelength are :

A) Red light

B) Radio waves

C) Infrared radiation

D) UV rays

Red light have a wavelength between 650 to 720 nm while a Blue light has a wavelength of 380nm to 500nm which makes it to produce a high energy  visible light.( HEV ) light. therefore the Red light has a longer wavelength.

The wavelength of a microwave is approximately  30 centimeters to 1 millimeter, which makes it shorter than the wavelength of a radio wave ( shortest wavelength in the electromagnetic spectrum.

Hence we can conclude that The forms of radiation from the pairs listed that have longer wavelength are A) Red light B) Radio waves C) Infrared radiation D) UV rays

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Answer:

2.04 g/cm3

Explanation:

Density = mass ÷ volume

= 5100 ÷ 2500

=2.04 g/cm3

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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To determine if a wavelength of 455 nm is appropriate for spectroscopic analysis of FeNCS2+, we need to consider the absorption spectrum of the substance. The reddish-brown color suggests that FeNCS2+ absorbs light in the visible spectrum.

If the absorption spectrum of FeNCS2+ is not known, it would be ideal to perform a UV-visible absorption spectroscopy experiment to obtain the absorption spectrum of the substance. This experiment would involve measuring the absorbance of FeNCS2+ at various wavelengths within the visible and UV ranges.

However, if the absorption spectrum is not available, we can make some general assumptions. In the visible range, wavelengths between approximately 400 nm and 700 nm are commonly used for spectroscopic analysis. The specific wavelength of 455 nm falls within this range and may provide suitable results for FeNCS2+. However, it is important to note that without the actual absorption spectrum of FeNCS2+, we cannot definitively determine the most appropriate wavelength.

To explore other potential wavelengths, a broader range of visible wavelengths, such as 400 nm, 500 nm, and 600 nm, could be considered. Additionally, if the absorption spectrum extends into the UV range, wavelengths below 400 nm should also be explored. Ultimately, it is best to experimentally determine the absorption spectrum of FeNCS2+ to identify the most appropriate wavelength for accurate analysis.

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When the partial pressure of carbon dioxide (pCO2) in the plasma increases, this leads to a decrease in plasma pH, resulting in a more acidic environment. The relationship between pCO2 and pH is described by the Henderson-Hasselbalch equation, which helps predict the acid-base balance in the body.

An increase in pCO2 levels indicates that more CO2 is being produced or less is being eliminated. As CO2 dissolves in the plasma, it forms carbonic acid (H2CO3), which subsequently dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-). The increase in H+ ions is what causes the decrease in pH, signifying a more acidic environment.
This change in pH can disrupt the body's normal homeostasis and is commonly referred to as respiratory acidosis. The body's response to this imbalance involves various buffering systems, such as the bicarbonate buffer system, to help restore pH to a normal range.
In conclusion, an increase in plasma pCO2 levels leads to a decrease in plasma pH, creating a more acidic environment. This can disrupt the body's normal functioning and prompt compensatory mechanisms to restore the acid-base balance.

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