the hot box is usually set between what temperature range?

Answer:

310.15 Degrees Kelvin

Explanation:

37 Degrees Celsius = 310.15 Degrees Kelvin = 98.6 Degrees Fahrenheit

Conversion Factor from Celsius to kelvin

or 37 + 273 = 310 Degrees Kelvin

Answer:

A.....

Explanation:

Carbon dioxide plus water yields glucose (sugar) and oxygen.

The concentration of the solution is 0.748 M.

To find the concentration of the solution, we need to calculate the number of moles of calcium carbonate present in the solution.

First, we need to determine the molecular weight of calcium carbonate (\(CaCO3\)).

\(CaCO3\) = 1 x Ca + 1 x C + 3 x O

= 40.08 g/mol + 12.01 g/mol + (3 x 16.00 g/mol)

= 100.09 g/mol

Next, we can use the formula:

concentration (in mol/L) = moles of solute / volume of solution (in L)

We have 37.5 grams of calcium carbonate in 500 ml of water. To convert ml to L, we divide by 1000:

volume of solution = 500 ml / 1000 ml/L = 0.5 L

moles of calcium carbonate = mass / molecular weight

= 37.5 g / 100.09 g/mol

= 0.374 moles

Therefore, the concentration of the solution is:

concentration = 0.374 moles / 0.5 L

= 0.748 M

The concentration of the solution is 0.748 M.

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So,

The reaction that takes place here is the next one:

The first thing we're going to do is to pass the mass of each compound to moles. (We do this just dividing by the molecular weight of the compound):

Now, the last step is just to divide each amount by the coefficient of the reaction of each compound. The smaller result will be the limiting reactant.

Therefore, the limiting reactant is O2.

The partial pressure of water in the Earth's atmosphere at 20°C with a relative humidity of 50% is approximately 11.75 hPa.

To calculate the partial pressure of water vapor in the Earth's atmosphere, we can use the concept of vapor pressure and the relative humidity.

Find the saturation vapor pressure (Pₛₐₜ) of water at 20°C:

The saturation vapor pressure can be determined using empirical equations or reference tables. At 20°C, the saturation vapor pressure of water is approximately 23.5 millibars (mb) or 23.5 hPa.

Calculate the partial pressure of water vapor (Pᵥ) using the relative humidity (RH):

The relative humidity is the ratio of the actual vapor pressure (Pᵥ) to the saturation vapor pressure (Pₛₐₜ), expressed as a percentage. In this case, the relative humidity is 50%.

Pᵥ = (RH/100) * Pₛₐₜ

Pᵥ = (50/100) * 23.5 mb

Pᵥ = 11.75 mb

Therefore, the partial pressure of water vapor in the Earth's atmosphere at 20°C with a relative humidity of 50% is approximately 11.75 millibars (mb) or 11.75 hPa.

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Answer:

sup brö how is it back home?

Explanation:

just curious you know

0.10 moles per liter solution of the conjugate base sodium acetate is likely to have a pH greater than 7.

When acetic acid (CH3COOH) donates a proton, it forms its conjugate base, acetate ion (CH3COO-). In the given scenario, the acetic acid solution has a pH of 2.87, indicating acidity. The lower pH value suggests a higher concentration of H+ ions. As a weak acid, acetic acid partially dissociates, releasing H+ ions and acetate ions. When sodium acetate (CH3COONa) dissolves in water, it completely dissociates into sodium ions (Na+) and acetate ions. The presence of acetate ions (the conjugate base) from sodium acetate will react with the excess H+ ions in the solution, shifting the equilibrium towards the formation of acetic acid and water. This process, called the hydrolysis of salts, will consume the H+ ions, thereby increasing the pH of the solution. Consequently, the 0.10 mole per liter solution of sodium acetate is likely to have a pH greater than 7, making it basic.

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Answer:

The new volume of the sample is halved.

Explanation:

Data obtained from the question include the following:

Initial volume (V1) = V

Initial temperature (T1) = T

Initial pressure (P1) = P

Final pressure (P2) = quadrupled = 4P

Final temperature (T2) = doubled = 2T

Final volume (V2) =?

Thus, we can obtain the new volume of the same by using the combined gas equation as shown below:

P1V1 /T1 = P2V2 /T2

P × V/T = 4P × V2/2T

Cross multiply

T × 4P × V2 = P × V × 2T

Divide both side by T × 4P

V2 = (P × V × 2T) / (T × 4P)

V2 = V/2

V2 = ½V

Therefore, the new volume of the sample is halved .

The Compounds A, B, and C are ionic compounds because they are solid at room temperature. Therefore, option B is correct.

A chemical compound known as an ionic compound is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.

Ionic chemicals are brittle and rigid. When an ionic chemical is dissolved in water, it separates into ions. Ionic compound solutions and melting forms of these substances carry electricity, while solid materials do not. The chemical formula of an ionic compound is metal + nonmetal or polyatomic ions.

Thus, option B is correct.

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Biometrics was first applied to law enforcement by Alphonse Bertillon, a French police officer, and researcher who borrowed the anthropological method of anthropometry to develop a biometric identification system therefore option D. is the right choice.

The police department's use of anthropometry as a means of criminal identification was the first scientific method of its kind. In the past, authorities could only track down offenders using their names or photographs. Fingerprinting ultimately replaced the technique.

Furthermore, he created the first-ever mug shot. Before Bertillon formalized the practice in 1888, offenders had already been photographed as early as the 1840s, just a few years after the introduction of photography.

In the historic Dreyfus case, Alfred Dreyfus has wrongfully convicted thanks to his faulty evidence.

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Answer: molarity = mole solute/ liter of solution.

=> volume= mole/molarity = 1/5 = 0.2 L = 200mL

Explanation:

Answer:

Rabbit and Mouse

Explanation:

The rabbit and mouse are the prey of foxes.

Answer:

D.) 429.73 grams

Explanation:

number of moles x molar mass= mass in grams

3.62 x 118.71= 429.73 grams

The Pauli Exclusion Principle states that no two electrons in an atom can share the same set of quantum numbers. So, the given statement is False.

Involved in this is the spin quantum number, which can be either +1/2 (spin-up) or -1/2 (spin-down). The electrons must occupy different spatial orbitals and have opposite spins to satisfy the exclusion principle in the field created by the overlapping atomic orbitals.  This maximises system stability by ensuring that electron pairing in molecular orbitals adheres to Hund's rule. Since the overlapping atomic orbitals create a gap, the electrons there will have opposing spins.

So, the given statement is False.

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I answered all of them except 2 for you to do

Hope this helps :))

It becomes a positives atom. Since it loses electrons it has more of a positive charge than a normal atom.

The reaction performed with the elephant toothpaste demonstration is known as a decomposition reaction.

The process of breaking down a chemical compound into smaller molecules, atoms, or ions is known as a decomposition reaction. It is also known as analysis or disintegration. A reaction in which a single substance is broken down into two or more simpler substances is known as a decomposition reaction. The elephant toothpaste demonstration is a simple chemical reaction in which hydrogen peroxide breaks down into oxygen gas and water in a matter of seconds.

The formula for hydrogen peroxide is H₂O₂. It is a pale blue liquid that contains hydrogen, oxygen, and water. When you add yeast, soap, and food coloring, the reaction is more exciting. The yeast acts as a catalyst, breaking down hydrogen peroxide into water and oxygen gas. The oxygen gas created causes the soap to foam up, creating the "elephant toothpaste" effect. The chemical reaction that takes place during the elephant toothpaste demonstration can be written as follows:

2H₂O₂(liquid) → 2H₂O (liquid) + O₂ (gas)

This reaction is an example of a decomposition reaction.

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Answer

7.53% 97% if you divide it you can get the answer

Explanation:

Using drop-down menu , IUPAC name is as follows :

cis-3-decene: (Z)-3-decene  , cis-3-nonenetriene: (Z,Z,Z)-3-nonenetriene

trans-3-decene: (E)-3-decene , trans-3-nonene: (E)-3-nonene

cis-3-decene is an alkene with a double bond between carbon atoms 3 and 4, and both alkyl groups (attached to the double bond) on the same side of the double bond. Therefore, its IUPAC name is (Z)-3-decene.

cis-3-nonenetriene is a triene with three double bonds. The double bonds are between carbon atoms 3 and 4, 6 and 7, and 9 and 10. Since all the alkyl groups attached to the double bonds are on the same side of the double bonds, the compound is named as (Z,Z,Z)-3-nonenetriene. trans-3-decene is an alkene with a double bond between carbon atoms 3 and 4, and both alkyl groups (attached to the double bond) on opposite sides of the double bond. Therefore, its IUPAC name is (E)-3-decene. trans-3-nonene is an alkene with a double bond between carbon atoms 3 and 4, and both alkyl groups (attached to the double bond) on opposite sides of the double bond. Therefore, its IUPAC name is (E)-3-nonene.

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The percent error in the measurement of the tap water density is approximately 1.02%, while the percent error in the measurement of the filtered water density is approximately -0.40%.

To calculate the percent error, we use the formula:

Percent Error = (|Measured Value - True Value| / True Value) x 100

For the measurement of the tap water density:

Percent Error = (|1.015 g/mL - 0.997 g/mL| / 0.997 g/mL) x 100

Percent Error ≈ (0.018 g/mL / 0.997 g/mL) x 100

Percent Error ≈ 1.81%

For the measurement of the filtered water density:

Percent Error = (|0.993 g/mL - 0.997 g/mL| / 0.997 g/mL) x 100

Percent Error ≈ (0.004 g/mL / 0.997 g/mL) x 100

Percent Error ≈ 0.40%

The positive percent error in the tap water measurement indicates that the measured value is higher than the true value. This could be due to experimental errors such as inaccuracies in the measuring equipment, variations in temperature affecting the density, or impurities present in the tap water.

The negative percent error in the filtered water measurement indicates that the measured value is lower than the true value. This could be caused by the loss of dissolved substances during the filtration process or inaccuracies in the measuring equipment.

The tap water density measurement has a percent error of approximately 1.02%, indicating a slight overestimation. The filtered water density measurement has a percent error of approximately -0.40%, indicating a slight underestimation. Possible causes for these errors include experimental inaccuracies, variations in temperature, impurities in the tap water, and losses of dissolved substances during filtration.

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Answer

The new substances often have different combinations of atoms different from the reactants.

Explanation

The reactants and the new substances in a chemical reaction contain the same atoms, but they are rearranged during the reaction. As a result, the atoms end up in different combinations in the new substances. This makes the products new substances that are chemically different from the reactants.

Answer:

2.976 mol * 6.94 g/mol of lithium is needed to react with 12.6 L of nitrogen gas.

Explanation:

To determine the amount of lithium (Li) needed to react with a given volume of nitrogen gas (N2), we need to consider the balanced chemical equation and the ideal gas law.

What is the ideal gas law?

The ideal gas law is a fundamental equation in thermodynamics that describes the behavior of an ideal gas. It relates the pressure (P), volume (V), temperature (T), and number of moles (n) of a gas using the following equation:

PV = nRT

According to the given question:

Volume of nitrogen gas (V) = 12.6 L

Pressure of nitrogen gas (P) = 745 mmHg

Temperature of nitrogen gas (T) = 28.5 °C

We'll follow these steps to calculate the amount of lithium required:

Step 1: Convert the temperature to Kelvin. T(K) = T(°C) + 273.15 T(K) = 28.5 °C + 273.15 T(K) ≈ 301.65 K

Step 2: Convert the pressure from mmHg to atm. Pressure (P) = 745 mmHg / 760 mmHg/atm Pressure (P) ≈ 0.979 atm

Step 3: Apply the ideal gas law equation to calculate the number of moles of nitrogen gas (N2). PV = nRT

n = PV / RT

R = 0.0821 L•atm/(mol•K) (ideal gas constant)

n = (0.979 atm) * (12.6 L) / (0.0821 L•atm/(mol•K) * 301.65 K) n ≈ 0.496 mol

Step 4: Use the balanced chemical equation to determine the stoichiometry between lithium (Li) and nitrogen gas (N2). The balanced equation is: 6Li + N2 → 2Li3N

From the equation, we can see that 6 moles of lithium react with 1 mole of nitrogen gas.

Step 5: Calculate the moles of lithium needed based on the stoichiometry. moles of Li = (6 moles Li / 1 mole N2) * 0.496 mol N2 moles of Li ≈ 2.976 mol

Step 6: Calculate the mass of lithium using the molar mass of lithium.

Molar mass of Li = 6.94 g/mol mass of Li = moles of Li * molar mass of Li

Mass of Li ≈ 2.976 mol * 6.94 g/mol

The calculated mass of lithium will give us the amount of lithium needed to react with 12.6 L of nitrogen gas at the given conditions.

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Answer:

see it at Google search it

Answer:

The Police Station

Explanation:

They discipline the dogs to be trained

The reaction classification of the reaction, \(A_2B (l) -- > A_2 (g) + B_2 (g)\), is a decomposition reaction.

In chemistry, a decomposition reaction is one in which a compound or a reactant decomposes to produce two or more chemically unique substances as the products.

Thus, a typical decomposition reaction can be written as:

AB ---> A + B

Decomposition reactions are the opposite of combination reactions. In combination reactions, two or more reactants combine to form a single product. A combination reaction can be written as:

A + B ---> AB

Considering the reaction in question:  \(A_2B (l) -- > A_2 (g) + B_2 (g)\)

\(A_2B\) is the reactant. It undergoes a reaction to produce \(A_2\) and \(B_2\) respectively. In other words, the reaction is a decomposition reaction.

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Answer:

hello :3

A cold is a contagious upper respiratory infection that affects your nose, throat, sinuses and trachea (windpipe).

Explanation:

have a nice day :3

When the percent recovery is more than 100%, it means that you have more of the desired compound than you started with. The percent recovery is a measure of the amount of a desired substance that is obtained from a reaction, and it is typically calculated as follows: percent recovery = (actual yield / theoretical yield) x 100%If the percent recovery is more than 100%, it means that the actual yield is greater than the theoretical yield.

This can occur for a variety of reasons, such as: Contamination: The product may be contaminated with other substances that increase the mass of the sample. Reaction side products: A reaction may produce more than one product, and some of the byproducts may be included in the mass measurement.

Analytical error: There may be an error in the measurement of the mass of the sample or the product. These errors can occur due to a variety of factors, such as instrument calibration, sample preparation, or human error. In conclusion, a percent recovery of more than 100% likely indicates that you have more of the desired compound than you started with, but it is important to investigate the reasons for this result to ensure that it is accurate and reproducible.

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Considering the definition of molar mass,  the mass in 2.6 moles of C₈H₁₂ is 0.2808 kg.

The molar mass of an atom or molecule is the mass of one mole of that particle expressed in grams.

The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.

Being the molar mass of C₈H₁₂ 108 g/mole, you can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 108 grams, 2.6 moles of the compound contains how much mass?

mass= (2.6 moles× 108 grams)÷ 1 mole

mass= 280.8 grams= 0.2808 kg (being 1000 gr= 1 kg)

Finally, the mass is 0.2808 kg.

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Answer:

False

Explanation:

Mixtures are a solute and solvent that are not chemically combined, therefore easily separated. Solutions are a solute and solvent combined together.

As a system reaches thermal equilibrium, heat has been transferred from areas of high to low temperature.

In other words, when a system reaches thermal equilibrium, there is no longer a temperature difference between its different parts, and the heat has been evenly distributed throughout the system. This can happen through a variety of mechanisms, such as conduction, convection, and radiation, and the specific mechanism will depend on the properties of the system and the materials it is made of. Once thermal equilibrium has been reached, the system will remain at a constant temperature until something changes, such as the addition or removal of heat or a change in the materials or structure of the system.

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