PLEASE HELP ASAP
What chemical combines with nitrogen dioxide to form nitric acid?

Opg
H
OH
02
03

Mass of HCI consumed in the reaction 52.6 g.

Given information: Molar mass of HCI = 36.46 g/mol

No of moles of HCI consumed in the reaction = 1.44 moles

We can use the formula for the relationship between moles and mass to calculate the mass of HCI consumed in the reaction.

Mass = No of moles × Molar mass

Thus,Mass of HCI consumed in the reaction = 1.44 mol × 36.46 g/mol= 52.6064 g ≈ 52.6 g

Hence, 52.6 is the required answer in grams consumed of HCI

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Answer:

Explanation: in same temperature amounts of moles are proportional

To volumes of gases. When one mole Oxygen reacts with Sulphur,

One mole Sulphur dioxide is formed. Thus 3,5 litres O2 is needed to produce same volume SO2

a. Placing a chromatographic column in a non-vertical position can result in poor separation and distorted chromatographic peaks.

b. Allowing the liquid level of the eluent to drop below the top of the column can lead to air entering the column, causing loss of pressure and disruption of the separation process.

a. When a chromatographic column is not placed in a vertical position, several issues can arise. The primary concern is that the flow of the mobile phase through the column becomes uneven, leading to poor separation. The stationary phase inside the column is designed to interact with the sample components and separate them based on their affinities. When the column is not vertical, the mobile phase may flow more quickly through one side of the column, resulting in distorted chromatographic peaks and compromised separation efficiency.

b. If the liquid level of the eluent (mobile phase) drops below the top of the column, air can enter the column. This introduces air bubbles into the system, which can disrupt the flow and cause irregularities in the separation process. Air bubbles can decrease the pressure inside the column, leading to a loss of efficiency and resolution. Additionally, the presence of air bubbles can cause variations in the flow rate and affect the retention times of the analytes, leading to inaccurate and inconsistent results.

Therefore, it is crucial to ensure that the chromatographic column is placed in a vertical position and that the liquid level of the eluent is maintained above the top of the column to achieve reliable and accurate chromatographic separations.


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The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)

First, we shall obtain the volume of the substance. This can be obtained as follow:

Volume of substance = (Volume of water + substance) - (Volume of water)

Volume of substance = 75 - 70

Volume of substance = 5 mL

Finally, we shall determine the density of the substance. This is illustrated below:

Density = mass / volume

Density of substance = 2 / 5

Density of substance = 0.4 g/mL

Thus, the density is 0.4 g/mL (Option D)

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The test method that best determines chemical feed/dosage rates is the Jar test.

The best test method to determine chemical feed/dosage rates is a.) Jar test. This method involves simulating the coagulation, flocculation, and sedimentation processes in a controlled environment to determine the optimal dosage of coagulants or other treatment chemicals.

The jar test is used to determine the correct dosage of chemicals to be added to water or wastewater in order to remove tiny particles. Surface water sources including lakes, rivers, and reservoirs or groundwater well supplies both provide raw drinking water. Surface water frequently includes a lot of suspended particles, which gives it the appearance of being turbid, but groundwater usually tends to be relatively clear. Particulates are frequently to blame for some of the issues with colour, flavour, and odour that are connected to raw water supplies. For reuse or to recover valuable materials from the trapped particles, industrial effluent may be processed for particulate removal.

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Answer:

A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.

a)The concentration of NaOH in g/dm³ is approximately 18.18 g/dm³, and b)The concentration in mol/dm³ is approximately 0.4545 mol/dm³.

a)To calculate the concentration of NaOH in g/dm³ (grams per cubic decimeter) and mol/dm³ (moles per cubic decimeter), we need to know the amount of NaOH used in the reaction and the volume of the NaOH solution.

From the given information, we have:

Volume of NaOH solution = 27.5 cm³

Volume of HCl solution = 25.0 cm³

Molarity of HCl solution = 0.5 M

Since the reaction between NaOH and HCl is a 1:1 stoichiometric ratio, the moles of NaOH used can be determined from the moles of HCl used:

Moles of HCl = Molarity × Volume = 0.5 M × 25.0 cm³ = 12.5 mmol (millimoles)

Since the moles of NaOH used is also equal to the moles of HCl, we have:

Moles of NaOH = 12.5 mmol

b)To calculate the concentration of NaOH in g/dm³, we need to convert moles to grams using the molar mass of NaOH, which is approximately 40 g/mol:

Mass of NaOH = Moles × Molar mass = 12.5 mmol × 40 g/mol = 500 g

Now, we can calculate the concentration in g/dm³:

Concentration of NaOH (g/dm³) = Mass of NaOH / Volume of NaOH solution

= 500 g / 27.5 cm³

≈ 18.18 g/dm³

To calculate the concentration of NaOH in mol/dm³, we can use the same approach:

Concentration of NaOH (mol/dm³) = Moles of NaOH / Volume of NaOH solution

= 12.5 mmol / 27.5 cm³

≈ 0.4545 mol/dm³

Therefore, the concentration of NaOH in g/dm³ is approximately 18.18 g/dm³, and the concentration in mol/dm³ is approximately 0.4545 mol/dm³.

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Answer:

bri me jose my new account

Explanation:

Answer:

The height of a column of ethanol is 13.1m

Explanation:

we begin by converting the density to SI unit= 0.789g/cm3* 1kg * \(100^{3}\)* \(cm^{3}\)

                                                                               cm * 1000g * \(1^{3}m^{3}\)

                                                            = 789kg/m3

converting pressure to SI unit= 1 atm =101325 Pa

hence P= hdg

g= 9.81 m/s2

making h the subject of the formula

h= P/dg

h= 101325Pa/ 789kg/m3 * 9.81 m/s2

h= 13.1m

Answer provides an overview of the components required for determining the reaction yield. It includes the initial masses of the reactants (CuCl + 2 H₂O and Al foil), the mass of the empty filter paper, and the combined mass of the filter paper and copper product obtained after the reaction.

The reaction yield can be calculated by subtracting the mass of the filter paper from the combined mass of the filter paper and copper. This calculation provides an estimate of the amount of copper produced in the reaction, representing the yield of the reaction.

REPORT - Determination of Reaction Yield

1. Mass of CuCl + 2 H₂O: ____ g

The initial mass of the reactant CuCl + 2 H₂O was measured before the reaction took place. This value represents the combined mass of the copper chloride and water.

2. Mass of Al foil used: ____ g

The mass of the aluminum (Al) foil used as the other reactant in the reaction was measured. This value indicates the amount of aluminum initially present in the reaction mixture.

3. Mass of empty filter paper: ____ g

The mass of the empty filter paper was determined before collecting the solid copper product. This measurement serves as a reference point for the subsequent mass calculation.

4. Mass of filter paper plus copper: ____ g

After the reaction, the copper product was collected on the filter paper. The combined mass of the filter paper and copper was measured. This value includes the mass of the filter paper and the mass of the copper product obtained from the reaction.

Using the measured values, the reaction yield can be calculated by subtracting the mass of the filter paper from the combined mass of the filter paper and copper. This calculation provides an estimate of the amount of copper produced in the reaction, representing the yield of the reaction.

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Tectonic forces do not cause plates to slide over and under each other, to produce heat and pressure which forms igneous rocks

The rock cycle is a cycle which describes how the three basic rock types are related and how earth processes convert one rock type into another over geologic time.

Plate tectonic forces together with weathering and erosional processes, are responsible for the rock cycle.

Tectonic forces play the following roles in rock cycle:

Therefore, the statement that when plates slide over and under each other, the heat and pressure form igneous rocks is not True.

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Nuclear fusion in stars, such as our Sun, produces energy through the fusion of light atomic nuclei, mainly hydrogen, into heavier nuclei like helium. This fusion process releases a tremendous amount of energy.

Within the core of a star, where temperatures and pressures are extremely high, nuclear fusion takes place. The collisions between hydrogen atoms at such high temperatures provide the necessary energy to overcome electrostatic repulsion, enabling the fusion process.

In the proton-proton chain, the most common fusion process in stars, hydrogen nuclei combine to form helium nuclei through several reactions. The conversion of a small fraction of mass into energy, as described by Einstein's mass-energy equivalence, results in the release of energy in the form of gamma rays.

These high-energy photons interact with matter, gradually transforming into light and heat. This energy release sustains the star's stability by countering gravitational collapse and powers its luminosity for billions of years.

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The balanced equation among them is ;

\(A. \: \: N_23H_3 + H_2 \longrightarrow2NH_4\)

Answer:

\(N _{2}{3H} _{2} + H_{2} = > 2NH _{2}\)

is ur answer

Explanation:

equation for balanced is

\(N _{2}{3H} _{2} + H_{2} = > 2NH _{2}\)

The correct option is c. about 7.

The pH value of a water solution of NaI (sodium iodide) will be approximately 7,

NaI is a salt that dissociates completely in water, forming sodium ions (Na+) and iodide ions (I-). Neither of these ions has an acidic or basic nature in water. Since water itself is considered neutral with a pH of 7, the addition of NaI to water will not significantly alter its pH. Therefore, the resulting solution will have a pH value around 7.

The term "pH" refers to the measure of acidity or alkalinity of a solution. It is a numerical scale ranging from 0 to 14, where a pH of 7 is considered neutral. A pH value less than 7 indicates acidity, while a pH value greater than 7 indicates alkalinity or basicity.

The pH scale is logarithmic, meaning that each unit represents a tenfold difference in acidity or alkalinity. For example, a solution with a pH of 3 is ten times more acidic than a solution with a pH of 4. pH plays a crucial role in various fields such as chemistry, biology, environmental science, and medicine.

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According to the ideal gas law, the reaction can make 47 liters of water.

What is the ideal gas law?

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The shorthand equation shows us in a glance what happens in the electrochemical reaction. For a lead storage battery, we have; PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4

An electrochemical reaction is one in which electrical energy is produced from a chemical reaction. The equations in a lead storage battery are;

Anode: Pb (s) + HSO4- → PbSO4(s) + H+ + 2 e-

Cathode: PbO2(s) + HSO4- + 3 H+ + 2 e- → PbSO4(s) + 2 H2O

Overall: Pb (s) + PbO2(s) + 2 HSO4- + 2 H+ → 2 PbSO4(s) + 2 H2O

Hence, the shorthand notation of this reaction is;

PbSO4(s)/H2O//Pb (s) ,PbO2(s) /H2SO4

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Two different forms of a single gene are called 'alleles

Answer:b

Explanation:

Answer:

endoplasmic reticulum:

✔ helps in the production and movement of materials

Golgi body:

✔ packages and distributes materials in and out of cell

mitochondrion:

✔ supplies energy that the cell uses

ribosome:

✔ produces proteins for the cell

Explanation:

I did it on Edge

The function of endoplasmic reticulum is it helps in production and movement of a material.

Endoplasmic reticulum is defined as a network of membranous tubules present within the cytoplasm of a eukaryotic cell.

It is one of the important organ of human body system which helps us in production and movement of material from one body part to another.  

Golgi body helps in packaging and distribution of material in and out of cells.

Mitochondrion supply the energy to the cell. It is called as a power house of cell.

Ribosome helps to produce protein for the cell. It is called as protein factory.

Thus, the function of endoplasmic reticulum is it helps in production and movement of a material.

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Two or more substances that are combined physically but not chemically are called mixtures. A mixture is formed when different substances are blended together, and each component retains its individual properties.

Mixtures can be categorized into two main types: homogeneous mixtures and heterogeneous mixtures. In a homogeneous mixture, also known as a solution, the components are evenly distributed and cannot be visually distinguished. Examples include saltwater, air, and sugar dissolved in water.

In contrast, a heterogeneous mixture consists of visibly different components that are not uniformly distributed. Examples include a salad with various ingredients or a mixture of sand and water.

Unlike chemical reactions, where substances chemically combine to form new compounds with different properties, mixtures can be separated through physical means. Common separation techniques for mixtures include filtration, distillation, evaporation, and chromatography.

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Answer:

4th one is correct...............

The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) is equal to the moles of solute per litre of solution.

In this instance, the volume of the solution is 1250 mL, and the molarity of KC1 is 0.75 M. The following formula can be used to determine how many moles of KC1 are present in 1250 mL of 0.75 M KC1: Molarity (M) times the number of litres in the solution equals 0.75 M times (1250 mL/1000 mL/L) or 0.9375 moles of KC1.

Consequently, 0.9375 moles of KC1 are present in 1250 mL of 0.75 M KC1. It is significant to remember that a solution's molarity is a measurement of the amount of a solute present in a given volume of the solution.

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The best description of a chemical bond is A: "A chemical bond holds atoms together."

A chemical bond refers to the force of attraction between two or more atoms that holds them together to form a stable chemical compound. Atoms bond together by sharing, gaining, or losing electrons, resulting in the formation of molecules or compounds.

Chemical bonds are essential for the formation of substances and play a crucial role in determining the properties and behavior of matter. They involve the interaction of valence electrons, the outermost electrons in an atom, which are responsible for chemical bonding.

In summary, option A provides the most accurate and comprehensive description of a chemical bond, emphasizing its role in holding atoms together to form stable compounds. Therefore, Option A is correct.

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Answer:

The melting and boiling points of molecular compounds are generally quite low compared to those of ionic compounds. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound

The strongest winds could be found at Location C.

In a High Pressure System the winds usually move in a clockwise direction around the centre of the system in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.

However, the winds are generally light and relatively calm within the high pressure centre, and the strongest winds are typically found on the outer edges of the system, where the high pressure zone meets areas of lower pressure. These outer edges are known as the "ridge" of the high-pressure system, and the winds here can be quite strong as the high-pressure air flows outwards towards areas of lower pressure.

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Based on the relative humidity in the room, the drop of water on the hand will evaporate because the temperature is high enough.

The person will feel nothing when he comes out of the pool because the given humidity is close to the normal human bearing capacity of humidity.

The relation between humidity and temperature formula has inverse proportion with each other. If the temperature tends to  increase it will lead to a decrease in relative humidity hence the air will become drier however when the temperature lessens the air will become wet means the air will have more vapors.

The humidity level changes the temperature in your surrounding environment and also changes how you feel that temperature. Air with just the right quantity of humidity carries more heat than dry air and makes us feel comfortable in the winter seasons.  In the summer season , air having low levels of humidity helps us cool off at a faster rate.

So we can conclude that the water will evaporate and the person feels nothing.

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Answer: The concentration of given solution is 11.68 M.

Explanation:

Given: Mass of solute = 10 g

Volume of solution = 25 mL

Convert mL into L as follows.

\(1 mL = 0.001 L\\25 mL = 25 mL \times \frac{0.001}{1 mL}\\= 0.025 L\)

Number of moles is the mass of substance divided by its molar mass. The moles of sugar (molar mass = 342.3 g/mol) is as follows.

\(No. of moles = \frac{mass}{molar mass}\\= \frac{10 g}{342.3 g/mol}\\= 0.0292 mol\)

Molarity is the number of moles of solute present in a liter of solution.

Hence, concentration of given solution is calculated as follows.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.0292 mol}{0.025 L}\\= 11.68 M\)

Thus, we can conclude that the concentration of given solution is 11.68 M.

Answer:

2, s

Explanation:

The there will be two orbitals in the s subshell because the first orbital can only contain two electrons and there will be need of a second one