What type of reaction occurs when the oxidation numbers of two or more atoms change?.

Answer:

The answer is "6.68 \(\frac{ml} {hr}\)".

Explanation:

It's going to be 18.18 kg to turn body mass to kg.  

Size 1mg / kg / hr, therefore = 1 x 18.18

                                               = 18.18 kg / hr  

now we adding 30 mg / ml of dextrose = 30 x 15

                                                                 \(=\frac{450mg}{15 ml +150 ml}\)

of dextrose, from 15 ml to 150 ml;  

Therefore, now 450 mg in 165m:    

\(= \frac{ 450}{165}\\ \\=2.72 \frac{mg} {ml}\)  

now divide the   18.18 by 2.72:

\(=\frac{18.18}{2.72}\)

= 6.68 \(\frac{ml} {hr}\)

Answer:

3.40% corrected to 1dp

Explanation:

78.4-75.7=2.7

percentage error = error/original value× 100

= 2.7/78.40×100

= 3.44387755102040

= 3.40% corrected to 1dp

Answer:

An increase in the intensity of sounds or fire issuing from a relief valve.

Propane serves as the propellant in all aerosols. R-12, a Freon that was the previous propellant, has been outlawed because it harms the ozone layer above the poles. Propane and R-12 share the same pressure-temperature characteristics.

Propane's boiling point is quite low. It desires a boil-off at ambient temperature. And it continues to do so until the pressure inside a closed container rises to roughly 150 psi (give or take depending on temperature), at which time the boiling point is raised high enough to cause the substance to stop boiling.

"Contents Under Pressure" is exactly what the notice indicates. Paint, hairspray, lubricant, wasp and hornet spray, among other liquids, can be found within an aerosol can, which is a pressure vessel. By inspecting the bottom, you may determine whether a vessel is a pressure vessel. If it is dished in like a bowl, it has the same pressure-holding end as a huge propane tank, with the exception that the curve on the latter has an outward orientation. On aerosol canisters, it is inward because they must sit upright for ease. A circular bottom just cannot accomplish that. But the top resembles an outer hemisphere more or less.

Thank you,

Eddie

Answer:

10.58km

The formula needed to calculate the amount of wire used is expressed as:

W is the weight of wire used to wind a magnet

wg is the weight of wire per km

Given the following parameters:

Substitute the given parameters into the formula to have:

Hence the length of wire used is 10.58km

After 11 years, a tritium sample will contain about 41.6% of the original amount.

A hydrogen isotope with a half-life of 12.3 years, tritium (also known as T or 3H) decays to 3He through beta decay.

Applying the formula for the half-life:N(t) = N₀(1/2)^(t/T)

where N(t) is the quantity still present at time t, N0 is the starting quantity, t is the time since the beginning of time, and T is the half-life.

For tritium, we have T = 12.3 years, and t = 11 years.

Substituting these values, we get:

N(11) = N₀(1/2)^(11/12.3)

We can multiply by 100 and divide N(11) by N0 to determine how much is left:

% remaining = (N(11) / N₀) * 100

% remaining = (1/2)^(11/12.3) * 100

% remaining = 41.6%

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In rainbow, the color that has the longest wavelength is red which means option 5 is the correct choice.

Dispersion is described to be the spreading of white mild into its complete spectrum of colors, in truth we also can say a complete spectrum of wavelengths. The white mild turns into from solar and includes seven colors. On one end of the spectrum is red with the longest wavelength. Blue or violet mild has the shortest wavelength. White mild is a aggregate of all hues withinside the color spectrum. The colors of the rainbow are: Red, orange, yellow, green, blue, indigo, violet.

Therefore, option 5 is the correct choice.

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The number of atoms of each element are:

From the question given above, we obtained:

5ZnSO₄

The number of each atom of each element present can be obtained as follow:

Zn = 5 × 1

Zn = 5 atoms

S = 5 × 1

S = 5 atoms

O = 5 × 4  

O = 20 atoms

Total atom = atoms of (Zn + S + O)

Total atom = 5 + 5 + 20

Total atom = 30 atoms

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Journal entries for the issuance of common stock by Foyle Corporation:

1. Assuming common stock has a par value of $5 per share:

  - January 10: Cash (70,000 shares × $5)  350,000

               Common Stock (70,000 shares × $5) 350,000

  - July 1:   Cash (40,000 shares × $7)      280,000

               Common Stock (40,000 shares × $5) 200,000

               Additional Paid-in Capital in Excess of Par - Common Stock 80,000

2. Assuming common stock is no-par with a stated value of $1 per share:

  - January 10: Cash (70,000 shares × $5)  350,000

               Common Stock (70,000 shares × $1) 70,000

               Additional Paid-in Capital in Excess of Stated Value - Common Stock 280,000

  - July 1:   Cash (40,000 shares × $7)      280,000

               Common Stock (40,000 shares × $1) 40,000

               Additional Paid-in Capital in Excess of Stated Value - Common Stock 240,000

1. When common stock has a par value of $5 per share, the journal entries reflect the issuance of shares at their par value.

On January 10, 70,000 shares are issued for cash, resulting in a debit to the Cash account and a credit to the Common Stock account for $350,000 each.

On July 1, an additional 40,000 shares are issued for cash at $7 per share, resulting in a debit to the Cash account for $280,000, a credit to the Common Stock account for $200,000, and a credit to Additional Paid-in Capital in Excess of Par - Common Stock for $80,000 ([$7 - $5] × 40,000 shares).

2. When common stock is no-par with a stated value of $1 per share, the journal entries reflect the issuance of shares at their stated value.

On January 10, 70,000 shares are issued for cash, resulting in a debit to the Cash account and a credit to the Common Stock account for $350,000 and $70,000, respectively.

The remaining $280,000 is recorded as Additional Paid-in Capital in Excess of Stated Value - Common Stock. On July 1, an additional 40,000 shares are issued for cash at $7 per share, resulting in a debit to the Cash account for $280,000, a credit to the Common Stock account for $40,000, and a credit to Additional Paid-in Capital in Excess of Stated Value - Common Stock for $240,000 ([$7 - $1] × 40,000 shares).

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In the compound lead(III) bromide (PbBr3), the lead atom (Pb) is surrounded by three bromine atoms (Br).

Each bromine atom forms a single covalent bond with the lead atom. This results in a trigonal planar molecular geometry, where the lead atom is at the center, and the three bromine atoms are evenly spaced around it.

To represent this structure textually, we can use a simplified format:

Br

|

Pb — Br

|

Br

In this representation, the Pb symbol represents the lead atom, and the Br symbols represent the bromine atoms. The lines between the symbols indicate the covalent bonds between the atoms.

It's important to note that in reality, lead bromide (PbBr3) tends to exist as a complex ionic compound rather than a discrete molecular structure. The compound forms a crystal lattice structure, where the lead atom carries a +3 charge and the bromine atoms carry a -1 charge. However, the simplified representation above helps convey the arrangement of atoms and bonds in the compound.

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Answer:

Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4  

Explanation:

The unbalanced equation is given as;

Na2B4O7 + H2SO4(aq) + H2O → H3BO3(s) + Na2SO4(aq)

Balancing the equation of the reaction involves making sure the number of moles of elements in the reactants to be equal to the number of moles of the element of the products.

The balanced equation is given as;

Na2B4O7 + H2SO4 + 5H2O → 4H3BO3 + Na2SO4  

To solve this we must be knowing each and every concept related to isotope. Therefore, the correct options are options A among all the given options.

Every atom has an equal amount of protons and electrons, however isotopes are a little slightly weird because they contain variable quantities of neutrons while having an equal number of protons and electrons. Isotopes, however, differ in atomic mass while sharing the very same atomic number or place in the periodic table.

It is a naturally occurring (one parts per trillion) isotope.

It is radioactive, It has a half- life of 5,700 years.

It is found in all living organisms hence used for Carbon dating.

Therefore, the correct options are options A among all the given options.

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Answer:

hope it helps...

Explanation:

The beginning of the end for a main sequence star is when the core runs out of fuel for the fusion process.

The electrochemistry underlying the electrical current in a neuron as it is stimulated involves sodium channels opening to allow sodium to enter the cell.
2. The most fundamental variable that can likely explain the evolution of bigger brains is the overall ecological complexity that the animal deals with.

During neuron stimulation, an action potential is generated. This process involves the depolarization of the neuron's membrane, which is achieved by the influx of positively charged ions, primarily sodium ions (Na+). When a neuron is stimulated, voltage-gated sodium channels in the cell membrane open, allowing sodium ions to rapidly enter the cell. This influx of positive charge depolarizes the membrane, creating an electrical current that propagates along the neuron.

Regarding the second question, the most fundamental variable that can likely explain the evolution of bigger brains is the overall ecological complexity that the animal deals with. Animals that inhabit complex and challenging environments often require enhanced cognitive abilities to navigate and respond to their surroundings effectively. The ecological complexity, such as varied food sources, social interactions, and environmental stimuli, can drive the evolutionary pressure for larger brain size and increased cognitive capacity. While factors like diet, sociality, and mating strategies may play a role, the overall ecological complexity is considered a crucial determinant of brain evolution.


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After the precipitation reaction is finished, the concentration of the excess metal ion is 0.1045 M of a 25 ml sample of 0.25 m potassium carbonate solution is added to a 30 ml of a 0.4 m barium nitrate solution.

We must ascertain the amount of surplus metal ions present once the precipitation reaction is finished, according to the concentration.

The balanced chemical equation for the reaction will be written first.

K2CO3 + Ba(NO3) is the reaction's balanced concentration.

2 BaCO3 plus 2KNO3

Accordingly, 1 mole of potassium carbonate is necessary for 1 mole of Ba(NO3) to totally react.

We will now calculate how many moles of each reactant are present.

Volume = 25.0 mL for potassium carbonate equals 0.025 L.

Concentration equals 0.25 M.

Utilizing the equation

Concentration times volume times number of moles There are 0.25 0.025 moles of K2CO3 in total.

There are 0.00625 moles of K2CO3 in total.

Volume for Ba(NO3)2 is 30.0 mL, or 0.03 L.

Concentration:0.40 M There are currently 0.40 0.03 moles of Ba(NO3)2.

After the precipitation reaction is finished, the concentration of the excess metal ion is 0.1045 M

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It is likely that we would smell ammonia before we smell ethanol in this scenario. The correct option is (NH3).

Ammonia (NH3) has a lower molecular weight (17 g/mol) and a higher vapor pressure than ethanol (C2H6O, 46 g/mol), which means it will evaporate more easily and diffuse faster through the air.

Additionally, ammonia is highly soluble in water, which means it will quickly dissolve in any moisture in the air and become more concentrated, making it more likely to reach our noses.

In general, the speed at which a substance diffuses through air and reaches our nose (and thus our olfactory receptors) depends on a variety of factors, such as the volatility (vapor pressure) of the substance, its molecular weight, and its solubility in air.

However, it's important to note that individual sensitivity to smells can vary, and factors such as the distance between the person and the source of the odor, the concentration of the substances in the air, and the individual's olfactory threshold can all play a role in determining which odor is detected first.

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Lone pairs in a trigonal bipyramidal arrangement will occupy the equatorial positions to minimize repulsions between electron groups. The presence of lone pairs in a molecule creates additional electron-electron repulsions, and placing them in the equatorial positions allows for greater separation and minimizes these repulsions.

In a trigonal bipyramidal arrangement, there are five electron groups around the central atom. These electron groups can consist of both bonding pairs and lone pairs. Lone pairs exert larger repulsions compared to bonding pairs due to their higher electron density.

To minimize the repulsions between electron groups, the lone pairs are placed in the equatorial positions. This arrangement maximizes the distance between the lone pairs, reducing the repulsive forces between them. Placing the lone pairs in the axial positions would result in closer proximity and stronger repulsions between the lone pairs, leading to higher energy and less favorable geometry.

By occupying the equatorial positions, the lone pairs are positioned away from each other as much as possible, reducing electron-electron repulsions and achieving a more stable arrangement.

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Answer:

REGULATOR - A device which controls the flow of current or voltage in a circuit to a certain desired level. RELAY - An electrical coil switch that uses a small current to control a much larger current. RELUCTANCE - The resistance that a magnetic circuit offers to lines of force in a magnetic field.

Explanation:

0.112 L CO₂ is the volume of carbon dioxide.

Glucose ferments decompose to form the ethanol and carbon dioxide.

Balanced equation :  C₆H₁₂O₆  ----> 2C₂H₅OH (aq) + 2CO₂ (g)

By using formula, M= m/n

Where,

M⇒ Molar mass

m⇒ Mass of a substance (in grams)

n⇒ Number of moles of a substance

The molar mass (M) of C₆H₁₂O₆ (aq) ⇒180.156 g/mol

Calculating the moles(n) of C₆H₁₂O₆(aq) .

n ⇒ m/M

m ⇒ mass ⇒ 0.9 C₆H₁₂O₆

M ⇒ molar mass

n ⇒180.156g/mol C₆H₁₂O₆

n ⇒ 0.9g C₆H₁₂O₆/ 180.156 g/mol

n⇒ 0.005 mol C₆H₁₂O₆

Calculating moles(m) of CO₂ :

m⇒0.005 mol CaCO₃× (1 mol CO₂/1 mol  C₆H₁₂O₆)

m⇒ 0.005 mol CO₂

At STP of 273.15 K (0°C) and 1 atm, the molar volume of a gas is 22.414 L/mol.

Calculating volume of CO₂ :

Multiply the mole CO₂ by the molar volume to get the volume of CO₂ in liters.

⇒ 0.005 mol CO₂× 22.414 L/mol

⇒ 0.112 L CO₂  to three significant figures

Converting volume CO₂ in L to mL.

⇒ 0.112 L CO₂ × 1000 mL/L

⇒ 112.07 mL CO₂

Volume of CO₂ ⇒ 0.112 L CO₂  or 112.07 mL CO₂

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Once alcohol is absorbed into the blood, it is distributed throughout the body, affecting various organs and bodily functions.

The liver plays a significant role in processing alcohol and breaking it down into byproducts that can be eliminated from the body. The liver converts alcohol into acetaldehyde, which is then further broken down into acetate and eventually eliminated. This process takes time, with the liver typically taking an hour to break down one unit of alcohol. As the liver works to process alcohol, it may also release toxins that can contribute to a range of negative health effects. Over time, excessive alcohol consumption can lead to serious health problems, including liver disease, heart disease, and cancer. Alcohol, once absorbed into the blood, is distributed throughout the body, including the brain, kidney, lungs, and liver.

The liver is responsible for metabolizing alcohol, typically breaking down one unit of alcohol per hour. This process involves converting alcohol into acetaldehyde, a toxic substance, which is then further metabolized into non-toxic substances like acetate and water. Meanwhile, a small portion of alcohol is excreted through the lungs and kidneys. It is important to note that factors such as weight, age, and gender can affect the rate at which alcohol is processed.

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Answer:

A box

Explanation:

In quantum mechanics, the atom is metaphorically described as a box. In fact, the Schrödinger wave equation is based on the three dimensional box metaphor of the atom.

Thus, a box provides a convenient treatment of the atom as it represents the fundamental components of the problem of atomic structure, hence the answer.

C. A box

Thus, the correct option is C.

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Answer:

10,148

Explanation:

To solve this we must be knowing each and every concept related to Enthalpy. Therefore, 10,148KJ/mol is the ΔH for formation for the reaction 16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances. Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance.

The balanced equation for the given chemical reaction can be given as

16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

ΔH for formation= 10,148KJ/mol

Therefore, 10,148KJ/mol is the ΔH for formation for the reaction 16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

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Answer:

Two design criteria for the design of the ammonia making process are;

1) Sustainable hydrogen production by renewable energy

2)  Sustainable use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water

Explanation:

Ammonia is produced from natural gas in the following process;

H₂ + RSH → RH + H₂S

H₂S + ZnO → ZnS + H₂O (Waste water)

CH₄ + H₂O → CO + 3H₂

CO + H₂O → CO₂ + H₂

Ammonia is then produced by reacting the produced hydrogen with nitrogen in the presence of a catalyst in a process known as the Haber-Bosch process as follows;

3H₂ + N₂ → 2NH₃

The

The design criteria for the design of the ammonia making process therefore as follows;

1) Sustainable use of renewable energy to produce hydrogen gas from the electrolysis of water

2)  Use of the ammonia-water thermal absorption cycle to retrieve the ammonia present in the waster water.

The branch of science which deals with chemicals and their bond is called chemistry.

The two ways by which we can design ammonia making process is as follows:-

Two design criteria for the design of the ammonia making process are:-

The usage of ammonia is important in these ways:-

Hence, these are the design for the ammonia-making process.

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Answer:

\(m_{N_2}=93.3gN_2\)

Explanation:

Hello there!

In this case, for this stoichiometry-based problem, it is firstly necessary to realize that the decomposition of ammonium dichromate is given by:

\((NH_4)_2Cr_2O_7(s)\rightarrow N_2(g)+4H_2O(l)+Cr_2O_3(s)\)

Thus, since the mole ratio between ammonium dichromate and the gaseous nitrogen (molar mass = 28.02 g/mol) is 1:1, we can compute the produced mass of the latter via stoichiometry as shown below:

\(m_{N_2}=3.33mol(NH_4)_2Cr_2O_7*\frac{1molN_2}{1mol(NH_4)_2Cr_2O_7}*\frac{28.01gN_2}{1molN_2}\\\\ m_{N_2}=93.3gN_2\)

Best regards!

The radiations that can emit electromagnetic energy with shorter wavelengths are these ones. Because metal surfaces reflect microwaves, Occurrences including refraction, diffraction, reflection, and interference have an impact on the transmission of microwaves.

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The process of changing one or more chemicals into new ones with distinct chemical characteristics is known as a chemical reaction.

Atoms share or exchange electrons in a chemical bond to achieve stability. Ionic, covalent, and metallic connections are the three basic forms of chemical bonds. One atom transfers an electron to another atom to create an ionic bond between two oppositely charged ions. When atoms share electrons to fill their outer energy level, covalent connections are created. Metals have metallic bonding because their electrons are not tightly bound to any one atom but rather move freely through a lattice of positive ions. Chemical or physical activities, such as heating or breaking, can both break bonds. When a molecule that dissociates bonds, like water, is added to a chemical reaction, bonds are broken. Bonds are broken in physical processes by exerting enough energy on them, such as during mechanical grinding or shearing. Bond energy or bond dissociation energy is the term used to describe the energy needed to dissolve bonds.

The complete question is:

Explain simple chemical reactions and bonds in detail, including the types of bonds and how they form and break?

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Answer:

A and B

Explanation:

The reactants in this chemical equation are C and O₂.

  Given the chemical reaction is:

                   C  +  O₂   →  CO₂

In a chemical reaction, reactants combines to give the product. The reactants are located to the left side of the expression.

The products are found on the right side .

              A   +     B     →     C  

             reactants         products

So, in the given reaction,

  C and O₂ are the reactants and CO₂ is the product.

Answer: B and C

Explanation:

ur welcome

Answer:

2

Explanation:

1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.

2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.

3. Take out 10 mL of this solution and put it into another 90 mL of clear water.

4. Keep diluting the solution like this 5 to 8 times.

5. Is the water still coloured?

Answer:

A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.

Explanation: