given the following equation 2k cl2 --> 2kcl how many moles of kcl are produced from 2.00 moles of k and excess cl2

Answer:

Explanation:

"Oxygen fuels our living processes. It contracts our muscles, helps our cells to work, grow and regenerate, feeds our brains, calms our nerves, helps the heart to pump, cleanses the body of toxins, fights infection and boosts immunity," says Dr  Jena, Director, Institute of Emergency Medicine, Mission Hospital & Research Center , Madurai.

Lungs:

Once air enters the nose or mouth, it gets humidified and reaches the oliveoli, tiny air sacs that help to pull in oxygen and transfer it into the blood stream and also to pull out the carbon dioxide and push it out of the lungs and back up to breathe out.  destroys these oliveoli by thickening the walls so gas exchange becomes difficult.

Heart :

The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body. The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it gets rid of the carbon dioxide and picks up oxygen. Inan increase in oxygen demand occurs because of compromised lungs and fear (that excites the body). This may lead to heart damage, especially if the arteries were already clogged.

this may help you hope so

The answer is System.

When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.

Best of Luck!

Answer:

The answer is System.

Explanation:

When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.

Answer:

dic

Explanation:

Explanation:

A chemical change in a changes that leads to formation new product or chemical substance having new qualities both physical and chemical.

Therefore, chemical changes can be

1. Gas Production

2. Substances Dissolve to form new substance or solution.

3. Heat is Released is a chemical change.

4. Bubbling occurs.

Rest all are examples of physical changes.

47.1 ml of acetone has a mass of 37.2 g when the density is 0.7899 g/ml.

As stated in the question,

the density of acetone = 0.7899 g/ml

as we know, the mass of a substance per unit of volume is its density which means 0.7899 g ( mass) is present in 1 ml (volume). Hence, by the unitary method:

0.7899 g -> 1ml

1g-> 1/0.7899 ml

37.2 g -> 37.2/0.7899 ml = 47.1 ml

47.1 ml of acetone has a mass of 37.2 g.

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Answer:

Explanation:

For the first row, only protons identify an element. For the second row, protons and neutrons affect mass. For the third row, protons and electrons affect charge.

The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

To calculate the change in Gibbs energy, we can use the equation:

ΔG = ΔH - TΔS

ΔH - change in enthalpy,

ΔS - change in entropy,

T - temperature in Kelvin.

at 188 K, ΔH = 2380 J/mol and ΔS = 12.6 J/mol K

ΔG = (2380 J/mol) - (188 K)(12.6 J/mol K)

ΔG = 2380 J/mol - 2374.8 J/mol

ΔG = 5.2 J/mol

The positive value of ΔG indicates that the reactants are more stable than the products and that energy must be added to the system to drive the reaction forward.

Therefore, the change in Gibbs energy is 5.2 J/mol, and the reaction is non-spontaneous under these conditions.

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Answer:

Pressure on Surface A > Pressure on Surface B

Explanation:

Pressu

re on Surface B > Pressure on Surface A

A reaction comprises a reactant and a product. It is said to be in equilibrium when the rates for the forward and reverse reactions are equal. Thus, option D is correct.

An equilibrium reaction is a thermodynamic condition where the reactants and the products are at a stable position even before and after the reaction. They remain fixed and do not vary with the addition of any catalyst.

In the equilibrium position, the reaction rate of the forward (product formation) and reverse (reactant formation) remains the same and is seen in the reversible reactions only.

The amount of the products and the reactant remains constant till the temperature is constant but may vary if the tempearture is varied.

Therefore, the rate of reverse and forward are equal in the equilibrium reaction.

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Answer:

a SINGLE TEASPOON contains 2,300 milligrams of sodium or 2.3 grams!

Explanation:

hope this helps! :)

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

Baking soda and vinegar react chemically because one is a base and the other is an acid. Baking soda is a basic compound called sodium bicarbonate. Vinegar is a diluted solution that contains acetic acid. ... The result of this initial reaction is two new chemicals: carbonic acid and sodium acetate.

Answer:

t = 3.29 hour

Explanation:

It is given that,

The distance between a car and the lizard is 35.3 miles.

The speed of the car is 30.5 m/s

We need to find how long will it take the car to drive 35.3m.

It means,

Distance, d = 35.3 miles

Since, 1 mile = 1609.34 m

⇒ 35.3 miles = 56809.84 m

Speed, v = 30.5 m/s

Speed, v = d/t

So,

\(t=\dfrac{d}{v}\\\\t=\dfrac{56809.84\ m}{30.5\ m/s}\\\\t=1862.61\ s\)

or

t = 3.3 hour

Hence, it will take 3.3 hour.

The Hg atom's electronic configuration in the Lewis structure of HgCl2 is [Xe], 4f14, 5d10, and 6s2. As a result, the outer shell valence orbital of the Hg (mercury) atom has two valence electrons.

The electron is the smallest atom-forming particle and a carrier of a negative charge. For instance, the hydrogen atom only contains one proton and one electron. The uranium atom is unique due to its 92 protons and 92 electrons.

The electrons of the negatively charged atom are in charge of this. The positive charge of the protons in the atomic nucleus is balanced by the overall negative charge of an atom, which is created by all of its electrons. The electron is a very little element compared to all the other parts of the atom.

An electron may be attached to or free from an atom. A negatively charged subatomic particle is called an electron (not bound).

The complete question is,

What does mercury's Lewis dot structure look like?

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By investigating the origins of various diseases, scientists play a key role in hospitals. They aid in understanding the underlying processes, risk factors, and potential therapies for many illnesses through their scientific knowledge and research techniques.

To understand the intricacies of diseases , their study involves running tests, analysing data, and working with other medical specialists. By figuring out the underlying reasons, scientists make it possible to create efficient diagnostic equipment, therapeutic methods, and preventative techniques .

Their discoveries and techniques expand medical knowledge, improve patient care, and ultimately work towards communities and people experiencing greater health. There are very factors that contribute to the overall institution.

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Answer: 42.14 g

Explanation:      calcium nitrate -  \(Ca(NO_{3} )_{2}\)

                   , the molar mass of calcium nitrate = 164 g

                   mass required =\(0.257*164\)

                                               =\(42.14\) g

24 electrons.............

Answer:

I think it was a huge fish. umm not sure

Explanation:

Answer:

chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further tendency to change with time so that there is no observable change in the properties of the system

Explanation:

This is a textbook answer so it may not be right

The enthalpy change for the reaction CaCO3 (s) -> CaO (s, graphite) + O2 (g) is 571.6 kJ.

The enthalpy of the reaction CaCO3 (s) -> CaO (s, graphite) + O2 (g) can be calculated by summing the enthalpies of the individual reactions involved. The given information provides the enthalpy change for the decomposition of CaCO3 (s) and the combustion of C (s) to form CO2 (g). By combining these reactions, the enthalpy change for the overall reaction can be determined.

The given reactions are:

CaCO3 (s) -> CaO (s) + CO2 (g) (H = 178.1 kJ)

C (s, graphite) + O2 (g) -> CO2 (g) (H = -393.5 kJ)

To calculate the enthalpy change for the reaction CaCO3 (s) -> CaO (s, graphite) + O2 (g), we need to subtract the enthalpy change of reaction 2 from the enthalpy change of reaction 1. Since the enthalpy change is an extensive property, we can subtract the enthalpies directly:

ΔH = H(reaction 1) - H(reaction 2)

= 178.1 kJ - (-393.5 kJ)

= 178.1 kJ + 393.5 kJ

= 571.6 kJ

Therefore, the enthalpy change for the reaction CaCO3 (s) -> CaO (s, graphite) + O2 (g) is 571.6 kJ.

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To solve this problem, we need to use the principles of stoichiometry and combustion thermodynamics. The A/F ratio is the air-to-fuel ratio by mass, and it is defined as the mass of air required to completely combust one unit mass of fuel. The dew point temperature is the temperature at which the water vapor in the combustion products begins to condense, and it depends on the composition and temperature of the products.

The A/F ratio can be calculated as follows:

First, we need to write the balanced chemical equation for the combustion of ethane:

C2H6 + 3.5 O2 + (0.2 x 3.5) O2 -> 2 CO2 + 3 H2O + (0.2 x 3.5) N2

Here, the 3.5 O2 represents the stoichiometric amount of oxygen required to completely combust one unit mass of ethane, and the 0.2 x 3.5 O2 represents the excess oxygen supplied (20% excess air). The (0.2 x 3.5) N2 represents the corresponding amount of nitrogen in the excess air.

The molecular weights of the reactants and products are:

C2H6: 2 x 12.01 + 6 x 1.01 = 30.07 g/mol

O2: 2 x 16.00 = 32.00 g/mol

CO2: 1 x 12.01 + 2 x 16.00 = 44.01 g/mol

H2O: 2 x 1.01 + 16.00 = 18.02 g/mol

N2: 2 x 14.01 = 28.02 g/mol

Using these values, we can calculate the mass of air required to combust one unit mass of ethane:

A/F = (mass of O2 + mass of N2) / mass of C2H6

= [(3.5 x 32.00) + (0.2 x 3.5 x 28.02)] / 30.07

= 12.53

Therefore, the A/F ratio is 12.53 by mass.

To determine the dew point temperature of the products, we need to calculate the mole fractions of the water vapor and nitrogen in the products, and then use a psychrometric chart or equations to find the dew point temperature. Alternatively, we can use the following simplified equation:

Tdp = (243.12 x ln(RH/100) + 17.62 x T) / (17.62 - ln(RH/100) - T)

Here, Tdp is the dew point temperature in °C, RH is the relative humidity of the products, and T is the temperature of the products in °C.

Assuming the combustion products are initially at a temperature of 25°C and a relative humidity of 100% (i.e., the products are fully saturated with water vapor), we can calculate the mole fractions of the water vapor and nitrogen as follows:

Mole fraction of H2O = (n H2O) / (n H2O + n N2)

= (3 x 0.2) / [(3 x 0.2) + (3.5 x 0.2)]

= 0.3

Mole fraction of N2 = (n N2) / (n H2O + n N2)

= (3.5 x 0.2) / [(3 x 0.2) + (3.5 x 0.2)]

= 0.35

Using these values

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Answer:

53.49146

Explanation:

There are multiple ways to prevent these situations from occurring. The three most common protective devices are fuses, circuit breakers, and surge protectors

Explanation:

Answer: In metallic bonding, valence electrons can move freely between atoms

Explanation:

when metals bond to one another, their outermost energy levels overlap. this allows valence electrons to move freely between atoms in what is sometimes called a “sea of electrons

Explanation:

Atomic size gradually decreases from left to right across the periodic table because within a period of elements, all electrons are added to the same shell. However, at the same time, protons are being added to the nucleus, making it more positively charged. The effect of increasing proton number is greater than that of the increasing electron number. Therefore, there is a stronger nuclear attraction. This means that the nucleus attracts the electrons more strongly, pulling the atom's electron shells closer to the nucleus. As a result, the atomic diameter of the atom decreases.

The conductivity of NaCl(aq) is directly affected by temperature. As the temperature increases, the conductivity of the solution also increases.

This is because as the temperature increases, the kinetic energy of the ions in the solution increases, leading to more frequent collisions between the ions and thus an increase in the mobility of the ions.

The mobility of the ions is directly related to the conductivity of the solution. Therefore, the conductivity of NaCl(aq) can be considered a function of temperature.

When reporting conductivities, it is very important to report the temperature as well. This is because the conductivity of a solution is highly dependent on temperature, and the values obtained at one temperature cannot be compared directly to those obtained at another temperature.

Therefore, in order to make meaningful comparisons of conductivities between different solutions or different experiments, the temperature must be reported along with the conductivity values. This will allow for accurate comparisons and interpretation of the data.

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