How many grams of h20 is formed by mixing solutions containing 90.0 mol CuO and 18.01 mol NH3

The variables in gas-liquid chromatography (GLC) that lead to (a) band broadening and (b) band separation are: Diffusion, Mobile phase velocity, Column efficiency, Temperature, Retention Factor, Column Selectivity and efficiency.

(a) Band broadening in GLC is influenced by the following variables:
1. Diffusion: Both longitudinal diffusion (along the column) and eddy diffusion (caused by irregular flow paths) can lead to band broadening.
2. Mobile phase velocity: A higher mobile phase velocity can cause increased band broadening due to reduced equilibration time between the stationary and mobile phases.
3. Column efficiency: Lower column efficiency, which can be due to factors like packing quality, particle size, and column length, can result in broader bands.
4. Temperature: Increased temperature may cause increased band broadening due to a decrease in the viscosity of the mobile phase, which in turn affects the mass transfer.

(b) Band separation in GLC is influenced by the following variables:
1. Retention factor (k): The degree of separation between two components is related to their retention factors, which are determined by the partitioning of solutes between the stationary and mobile phases.
2. Column selectivity (α): Column selectivity is the ratio of the retention factors of two adjacent peaks. A higher selectivity value results in better band separation.
3. Column efficiency (N): A higher column efficiency, represented by the number of theoretical plates, improves band separation by providing sharper peaks.
4. Mobile phase composition: Adjusting the composition of the mobile phase can impact the partitioning of solutes, which in turn affects their separation.

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The incompressible assumption is valid for a flow when the Reynolds number is low (Re < 2300) for air and other gases. It is valid for water and other liquids when the Reynolds number is low (Re < 2000).

It is valid for glycerin and other oils when the Reynolds number is low (Re < 100).

Incompressible assumption

For a fluid flow to be considered incompressible, the change in density due to changes in pressure or temperature must be negligible. The fluid is considered to be incompressible if the density changes by less than 5% when the pressure or temperature is varied.

For air, the incompressible assumption is valid for flow velocities less than 2000 feet per minute (fpm) at 20 degrees Celsius. For other gases, the incompressible assumption is valid for velocities less than 100 fpm at the same temperature.

For water, the incompressible assumption is valid for flow velocities less than 3 feet per second (fps) at 20 degrees Celsius. For other liquids, the incompressible assumption is valid for velocities less than 1 fps at the same temperature.

For glycerin and other oils, the incompressible assumption is valid for flow velocities less than 0.2 fps at 20 degrees Celsius.

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Answer:

Endangered wildlife means that something is at risk of extinction.

Explanation:

Hope I helped

If 6.62 g of Cu(NO3)2 is dissolved in water to make a 0.130 m solution, the volume of the solution in milliliters is 320 mL.

First, we need to calculate the number of moles of Cu(NO3)2 in the solution:

moles of Cu(NO3)2 = mass / molar mass

moles of Cu(NO3)2 = 6.62 g / (63.55 g/mol + 2x14.01 g/mol + 6x16.00 g/mol)

moles of Cu(NO3)2 = 0.0416 mol

Next, we can rearrange the formula for molarity to solve for the volume of the solution:

volume of solution = moles of solute / molarity

volume of solution = 0.0416 mol / 0.130 mol/L

volume of solution = 0.320 L

Finally, we can convert this volume to milliliters:

volume of solution = 0.320 L x 1000 mL/L

volume of solution = 320 mL

Milliliters (abbreviated as mL) is a metric unit of volume that is commonly used to measure liquids and small amounts of substances. It is equal to one-thousandth of a liter, which means that one liter contains 1000 milliliters.

The milliliter is a very convenient unit for measuring small amounts of liquid or substances, especially in laboratory experiments and medical procedures. It is also commonly used for measuring the volume of drinks, such as soda or juice. To give you an idea of how much a milliliter is, it is about 20 drops from a standard eyedropper, or approximately the size of a small paperclip. One teaspoon is equivalent to 5 milliliters, while one tablespoon is equivalent to 15 milliliters.

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Complete Question:-

If 6.62 g of Cu(NO3)2 is dissolved in water to make a 0.130 m solution, what is the volume of the solution in milliliters?

The total number of valence electrons surrounding the central iodine atom in the icl2- ion is 8. Therefore, the correct answer is option C.

In the icl2- ion, the central iodine atom has 7 valence electrons. Since there are two chlorine atoms bonded to the central iodine, each chlorine atom brings one valence electron.

In addition, the ion carries a negative charge, which means that one extra electron is present. To determine the total number of valence electrons surrounding the central iodine atom, we add the valence electrons of the iodine atom (7) to the valence electrons of the two chlorine atoms (2 x 1 = 2) and the extra electron (-1). Thus, the total number of valence electrons surrounding the central iodine atom in the icl2- ion is 8. Therefore, the correct answer is option C.

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Answer:

I think its radiant energy.

Explanation:

The concentration of the phosphoric acid (H3PO4) solution is 0.164 M. The correct option is c. 0.1640 M.

The balanced equation for the reaction is:

H3PO4 + 3NaOH → Na3PO4 + 3H2O.

From the balanced equation, we can see that one mole of H3PO4 reacts with three moles of NaOH. Given that the volume of NaOH used is 37.04 mL and its concentration is 0.1107 M, we can calculate the number of moles of NaOH used: moles of NaOH = volume (L) × concentration (M) = 0.03704 L × 0.1107 M = 0.004104 mol . Since the stoichiometry of the reaction is 1:1 between H3PO4 and NaOH, the number of moles of H3PO4 present in the solution is also 0.004104 mol.To find the concentration of H3PO4, we divide the moles of H3PO4 by the volume of the solution in liters:
concentration of H3PO4 = moles / volume (L) = 0.004104 mol / 0.02500 L = 0.164 M. Therefore, the concentration of the phosphoric acid (H3PO4) solution is 0.164 M. The correct option is c. 0.1640 M.

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Answer:

alpha particles have the least penetration power while beta particles have a moderate penetration power and gamma particles have the highest penetration power.

Answer:

290.32 g

Explanation:

First we calculate the volume of the cube:

Now we convert cubic centimeters to mililiters:

Finally we calculate the mass, using the equation for density:

Answer:

hi my name is eden!!

the answer is area, whole number and shape

Explanation:

Answer:N-1

             H-3

             C-1

             H-4

Explanation:Nitrogen-1,Hydrogen-3(Ammonia),Carbon-1,Hydrogen-4(Methane).

According to the nurse preceptor, the new nurse adheres to a number of safe practices while administering red blood cells (RBCs) to a patient.

Based on the given options, the actions that are deemed safe by the nurse preceptor are:

Using large gauge catheters (20-24 gauge). When giving red blood cells (RBCs) to a patient, the novice nurse follows a number of safe procedures, according to the nurse preceptor. To ensure appropriate flushing and lower the chance of an air embolism, the inexperienced nurse correctly primes the intravenous tube with 0.9% sodium chloride in the first step. The second step is for the inexperienced nurse to collect and record a complete set of baseline vital signs. This creates a baseline for monitoring the client's status both before and after the transfusion. Third, in accordance with the advised duration for safe administration, the nurse modifies the infusion rate to administer the RBCs in 4 hours as opposed to 6 hours. Fourth, the inexperienced nurse employs big gauge catheters (20-24 gauge) to promote quick and smooth blood product flow and reduce problems.

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Biodiesel is indeed an alkylester (RCOOR') obtained from fat, and it possesses combustion characteristics similar to diesel fuel. However, biodiesel is known to be more stable, non-toxic, and less susceptible to microbial decomposition due to its relatively high flash point.

Biodiesel is produced through a chemical process called transesterification, where fats or vegetable oils are reacted with an alcohol (usually methanol or ethanol) in the presence of a catalyst, such as sodium hydroxide or potassium hydroxide.

This reaction results in the formation of alkyl esters, which are the main components of biodiesel.

The combustion characteristics of biodiesel are similar to those of conventional diesel fuel, which make it a suitable alternative for diesel engines without requiring significant engine modifications.

Biodiesel has a higher flash point compared to petroleum diesel, meaning it requires a higher temperature to ignite. This property enhances safety and reduces the risk of accidental fires.

Furthermore, biodiesel is considered stable because it has a lower propensity to degrade or oxidize over time compared to conventional diesel fuel. This stability ensures that biodiesel can be stored for longer periods without significant deterioration in quality.

Biodiesel is also recognized for its non-toxic nature. It is biodegradable and poses fewer health risks than petroleum-based diesel fuel. In case of a spill or leakage, biodiesel can be less harmful to the environment and human health.

In summary, biodiesel is an alkylester obtained from fat through the transesterification process. It exhibits combustion characteristics similar to diesel fuel but offers several advantages, including stability, non-toxicity, and a relatively high flash point.

These properties make biodiesel a viable and environmentally friendly alternative to petroleum diesel fuel, contributing to the diversification of energy sources and reducing the environmental impact associated with traditional fossil fuels.

CH₂-OCOR¹ CH-OCOR² + 3CH₂OH CH- CH₂-OCOR³ Triglyceride Methanol A + 3M Catalyst CH₂OH R¹COOCH3 CHOH + R³COOCH3 CH₂OH R³COOCH3 Glycerol Methyl esters G + 3P Triglyceride + R¹OH Diglyceride + R¹OH Monoglyceride + R¹OH Diglyceride + RCOOR¹ Monoglyceride + RCOOR¹ Glycerol + RCOOR¹ A+MB+P [1] B+MC+P [2] C+M G+P [3] temp (°C) 45 55 65 time (min) 5 0.94 0.89 0.80 10 0.89 0.81 0.67 15 0.84 0.74 0.57 20 0.80 0.67 0.50 25 0.76 0.63 0.45 30 0.73 0.58 0.40 tem(C) 45 55 65 60 rate constant (L/(mol min)) kl k2 Obtained from question 0.0255 Obtained from question 0.0510 Obtained from question 0.0965 Obtained from question ? k3 0.0881 0.141 0.218 ?

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The balanced equation of the chemical reaction would be \(2CH_3OH + 3O_2 -- > 2CO_2 + 4H_2O\)

In order to balance equations of reactions, the equations need to obey the law of conservation of atoms. According to this law, atoms can neither be created nor destroyed during reactions, but their forms may change. In other words, the total number of atoms of different elements in reactions is conserved.

Thus, the same number of atoms of different elements must exist in the reactants and the products, irrespective of their forms.

Following this rule, the balanced reaction of the equation illustrated in the problem would be: \(2CH_3OH + 3O_2 -- > 2CO_2 + 4H_2O\)

In the balanced equation, one can see that C, H, and O atoms in the reactants and the products are of equal numbers.

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A compound with a soapy feel suggests that it is likely a basic substance. Basic substances have pH values above 7 on the pH scale, which ranges from 0 to 14.

The pH scale is logarithmic, meaning each unit represents a tenfold difference in hydrogen ion concentration. Given that the soapy feel is a characteristic of basic compounds, you would expect the mystery compound to exist in a pH range that is greater than 7.

This range typically falls between pH 8 and pH 14, with higher pH values indicating stronger alkaline properties.

However, without further information, it is challenging to determine the exact pH range of the mystery compound.

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Sulfur has a negative charge of 2 because it has gained two electrons to fulfill its octet rule.

Sulfur (S) has a negative charge of 2 because it has gained two electrons to fulfill its octet rule, which is a guideline in chemistry stating that atoms tend to gain, lose or share electrons to achieve a stable electron configuration of eight valence electrons (except for hydrogen and helium, which need only two electrons).

Sulfur is in Group 6 of the periodic table, which means it has six valence electrons. In order to fulfill the octet rule and achieve a stable electron configuration, it needs to gain two more electrons. When sulfur gains two electrons, it forms a stable S2- ion, which has a total of eight valence electrons.

The negative charge on the S2- ion arises because electrons are negatively charged particles. When sulfur gains two electrons, the total negative charge of the ion is increased by the charge of the two electrons, which is -2. Therefore, the S2- ion has a net charge of -2.

This makes sulfur an anion, which is a negatively charged ion. Anions are formed by gaining electrons, which leads to an excess of negative charge. In contrast, cations are positively charged ions, which are formed by losing electrons, resulting in an excess of positive charge.

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Answer:

See explanation

Explanation:

Microwaves work by flipping water molecules upside down, then right side up again, and so on at very high speeds, and the friction generates heat. Some glass or plastic isn't affected by the microwaves, so the molecules don't get flipped, and so no friction occurs and no heat is produced, leading to the dish not being heated up.

Answer:

Length

- centimetre

- millimetre

- kilometre

- meter

Mass

- gram

- kilogram

Capacity

- liter

- millilitre

I don't know why mass is there but hope this helps! :)

We can distinguish between the compounds by using 1H NMR spectroscopy as the first compound will have three signals in its 1H NMR spectrum, while the second compound will have six signals. Hence, option C is correct.

Generally NMR spectroscopy is defined as an information-rich and non-destructive analytical tool, nuclear magnetic resonance (NMR) spectroscopy uses the inherent magnetic properties of specific atomic nuclei to reveal the structure, identity, concentration, and behavior of molecules in solid or liquid samples.

In the first compound, no of equivalent protons in the molecule is 3. Hence, in 1H NMR spectrum we can see 3 signals.

In the second compound, there is no plane of symmetry in the given molecule. Therefore, no equivalent protons in the molecule. Hence, in 1H NMR spectrum we can see 6 signals. Hence, option C is correct.

The diagram of two compounds is given in the image attached below.

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Answer:

B.

General Formulas and Concepts:

Chemistry - Organic

Explanation:

We are given C₈H₁₈. We need a Bond-Line notation where there are 8 "arrow" points (which represent Carbon). We can disregard the Hydrogens as they are assumed to take the rest of the bonds.

Only option B has a value of 8 carbons, represented by the "arrow" points. Therefore, it is the correct answer.

Answer: lucky fluoride

Explanation:

Answer:

EASY

Explanation:

Answer:

Sodium

Explanation:

because it can cause electricity

Answer:

0.921 J/g degrees C

Explanation:

Recall that the First Law of Thermodynamics demands that the total internal energy of an isolated system must remain constant. Any amount of energy lost by the brakes must be gained by the tires (in the form of heat in this situation).  Therefore, heat given off by the brakes = −heat taken in by tires, or:

−qbrakes=qtires

The equation used to calculate the quantity of heat energy exchanged in this process is:

−qbrakes=−cbrakes mbrakes ΔTbrakes=ctires mtires ΔTtires=qtires

First we must convert the mass of the tires and the brakes from  kg to  g.

massbrakes=90.7 kg×1,000. g1 kg=9.07×104 g

masstires=123 kg×1,000. g1 kg=1.23×105 g

Next, substitute in known values and rearrange to solve for ctires. Note that the final temperature for both the tires and the brakes is 172∘C, the initial temperature of the brakes is 312∘C and the initial temperature of the tires is 15∘C.

−(1.400Jg∘C)(9.07×104 g)(172∘C−312∘C)=(ctires)(1.23×105 g)(172∘C−15∘C)

ctires=−(1.400 Jg∘C)(9.07×104 g)(−140∘C)(1.23×105 g)(157∘C)=17,777,200 J19311000 g∘C=0.9206Jg∘C

The answer should have three significant figures, so round to 0.921Jg∘C.

Answer:

Bismuth

Explanation:

The decay constant of the end product of natural radioactive series is zero because at the end of the radioactive decay, the product formed is a stable one and will not undergo any further decay in the future.

Answer:

neutron

Explanation:

neutron and proton has approximately the same mass .proton is positively charged but neutron has no charge

You can use chemical formulas to determine if a change is either chemical or physical by looking for changes in the number and type of atoms in the reactants and products.

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Answer:

C12H24

Explanation:

The molar mass of the CH2 unit is 14 g/mole.  The final molecule has multiples of CH2 so that it's molar mass is 168 g/mole.

(168 g/mole molecule)/(14 g/mole Unit) = 12 Units

12 CH2 units would make the molecualr formula:  C12H24

This is more than one structure that has this formula:  Cyclododecane and 1-Dodecene.

To determine the volume of a 9.90 M HCl solution needed to prepare 251 mL of a 2.9 M HCl solution, we can use the formula:

C1V1 = C2V2

where:

C1 = concentration of the initial solution

V1 = volume of the initial solution

C2 = concentration of the final solution

V2 = volume of the final solution

Let's substitute the known values into the equation and solve for V1:

9.90 M (V1) = 2.9 M (251 mL)

V1 = (2.9 M × 251 mL) / 9.90 M

V1 = 72.9 mL

Therefore, you would need 72.9 mL of a 9.90 M HCl solution to prepare 251 mL of a 2.9 M HCl solution.

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The pH of the sol-gel solution plays a crucial role in determining the size and shape of the silica nanoparticles produced during the freeze drying assisted sol-gel process.

The pH of the solution used in the freeze drying assisted sol-gel process can have an influence on the spherical shape and particle size of silica nanoparticles (SNPs). When the pH is adjusted, it affects the hydrolysis and condensation reactions that occur during the sol-gel process. This, in turn, can impact the formation and growth of the silica nanoparticles.

In general, at higher pH values, the hydrolysis reaction is favored, leading to the formation of larger silica particles. On the other hand, at lower pH values, the condensation reaction is favored, resulting in the formation of smaller particles.

Furthermore, the pH also influences the surface charge of the SNPs, which can affect their stability and aggregation behavior. At specific pH values, the surface charge can be neutralized, leading to particle aggregation.

Overall, the pH of the sol-gel solution plays a crucial role in determining the size and shape of the silica nanoparticles produced during the freeze drying assisted sol-gel process.

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