how do we calculate the spin only formula

Answer:

The east hemisphere.

Explanation:

Simply use a compass of sort to determine the hemisphere in the image.

North^ South v East > West <

Any external solution that contains the same amounts of solutes or water as biological fluids is seen to be isotonic. The flow of water inside an isotonic solution won't be net.

The 16- or 18-carbon fatty acids, also known as palmitic acid or stearic acid, respectively, are among the most widely dispersed fatty acids. The bulk of organisms' lipids contain both and stearic acids. In animals, up to 30% of body fat is made up of palmitic acid.

Water only partially dissolves fatty acids. The hydrophilic COOH group just at end of the hydrocarbon chain is what causes the partial solubility. The hydrocarbon chains cannot be dissolved at all in water.

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Due to the creation of complicated potassium aluminate, this reaction is complex.

The FDA classifies potassium alum as a chemical that is generally acknowledged as safe (GRAS). It is an inorganic salt with the formula AlK(SO4)2, sometimes known as potassium aluminum sulfate.

Nowadays, potassium sulfate is added to a concentrated solution of aluminium sulfate to create potassium alum in an industrial setting. Typically, sulfuric acid is used to process minerals like cryolite, bauxite, and alum schist to produce aluminum sulfate.

Breif:

2 Al ( s ) Aluminium + 2 KOH ( aq ) Potassium hydroxide + 6 H 2 O ( l ) Water → 2 K [ Al ( OH ) 4 ] ( aq ) Tetrahydroxoaluminate ( III ) or Potassium aluminate + 3 H 2 ( g ) Hydrogen.

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It appears that the straw in the glass of water is bent or refracted at the water-air interface. This is a result of the phenomenon known as refraction. Refraction occurs when light travels from one medium to another with a different optical density, causing the light rays to change direction.

Based on the provided image from BrainPOP Science, it appears that the straw in the glass of water is bent or refracted at the water-air interface. This is a result of the phenomenon known as refraction. Refraction occurs when light travels from one medium to another with a different optical density, causing the light rays to change direction.

In this case, as the light passes from the water to the air, it undergoes refraction because the speed of light is different in water compared to air. The change in speed causes the light rays to bend as they cross the water-air boundary. This bending of light is what makes the straw appear bent or displaced when viewed through the glass of water.

The phenomenon of refraction is a common optical effect and can be observed in various situations where light passes through different mediums with varying optical properties.

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During the experiment determining the activation energy, the decomposition of an iron (III) phenanthroline complex ion will be monitored at different temperatures.

Activation energy refers to the energy required for a chemical reaction to take place. The decomposition of the iron (III) phenanthroline complex ion involves breaking apart the complex into its individual components. By monitoring the rate of decomposition at different temperatures, the activation energy of the reaction can be determined. This information can be useful in understanding how the reaction proceeds and in optimising reaction conditions for a desired outcome.

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Answer:

The correct answer is - 75 grams.

Explanation:

Half-life is the amount of time that is used by the given amount of substance or element to make it half of the initial amount of a particular radioactive substance.

Equation for alpha decay for radon

\(^222_{86}Rn\Rightarrow^{218}_{84}Po  \)

we need to calculate the left amount of radon after given time

using formula half life

\(N(t)=N_{0}e^{-\lambda t}\)

\(\lambda =\dfrac{0.693}{3.82}\)

\(\lambda=0.1814\)

\(N(3.82)=150\times e^{-0.1814\times3.82}\)

\(N(3.82)=75.0\ g\)

Thus, the left amount of radon is - 75 grams.

Nasser and Buti are liable for the debts and other financial obligations of their company under the Commercial Companies Law of UAE.

Article 73 states that a partner in a partnership company is jointly liable with the company for the company's obligations. Hence, both the partners are responsible for the debts and obligations of the company.

2. No, the appointment of Ahmad, a non-partner, as a manager of the company was not in accordance with the law. Article 154(1) states that a manager must be a partner in the limited liability company or a shareholder in a public joint-stock company. As Ahmad is not a partner, his appointment as a manager is not valid.

3. Victor's liability for debts and other financial obligations of the company is limited as he is a shareholder of the company and not a partner. Article 72 states that the liability of a shareholder is limited to the value of the shares that he holds. Therefore, Victor's liability is limited to the value of his shares.

4. Yes, Viktor has acted in contravention of the law by performing managerial duties and entering deals on behalf of the company. Article 154(2) states that a manager must not perform any activities that are not related to the company's business or have the potential to cause harm to the company. By performing managerial duties and entering deals on behalf of the company, Viktor has violated this provision.

5. Yes, Ahmad violated the law by withdrawing the 50,000 AED from the company's account. Article 172(1) states that a manager must not withdraw any amount from the company's account without the approval of the general assembly. As Ahmad withdrew the amount without the approval of the general assembly, he violated the law.

6. Yes, Ahmad's dismissal was lawful and in accordance with the law. Article 159 states that a manager can be dismissed by a resolution of the general assembly. As Ahmad was dismissed by a resolution of the general assembly, his dismissal was lawful.

7. Global Domination LLC has joined the company as a shareholder. The transfer of shares is considered effective as per Article 83, which states that the transfer of shares is effective from the date of registration in the commercial register.

Incomplete question :

Answer the following questions with specific reference to relevant Articles of the Commercial Companies Law: 1. What is the liability of Nasser and Buti for the debts and other financial obligations of their company? (2 points)

2. Was the appointment of Ahmad, a non-partner, as a manager of the company in accordance with the law? (1 point)

3. What is Victor's liability for debts and other financial obligations of the company? ( 2 points)

4. Has Viktor acted in contravention of the law by performing managerial duties and entering deals on behalf of the company? (1 point)

5. Did Ahmad violate any rules by withdrawing the 50,000 AED from the company's account? (1 point)

6. Was Ahmad's dismissal lawful and in accordance with the law? (1 point)

7. In what capacity has Global Domination LLC joined the company? Is the transfer of shares considered effective? (2 points)

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Therefore, an infant weighing 14 lbs (6.4 kg) should be given 0.96 mL of the acetaminophen suspension.

Acetaminophen is the recommended over-the-counter drug for the treatment of fever and mild to moderate pain in infants. The drug is safe and effective when used according to the recommended dosage.

Acetaminophen suspension contains 80 mg/ 0.80 mL suspension.

The recommended dose is 15 mg/kg body weight.

Therefore, to calculate how much of the suspension should be given to an infant weighing 14 lbs (6.4 kg),

we need to perform the following calculations:

Calculate the dosage based on the infant's weight:

15 mg/kg x 6.4 kg = 96 mg

Determine how many milliliters of the suspension contain 96 mg:

80 mg/0.80 mL = 96 mg/x mL (cross-multiplication)80

x = 76.8 (solving for x)

x = 0.96 mL (rounded to two significant figures)

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Answer:

K = [N2] [Cl2]³ / [NCl3]²

Explanation:

The equilibrium expression, K, of a reaction:

aA + bB ⇄ cC + dD

Is defined as the ratio between the multiplication of concentrations of products powered to its reaction coefficient and the multiplication of concentrations of reactants powered to its reaction coefficient as follows:

K = [C]^c[D]^d / [A]^a[B]^b

Now, for the reaciton:

2NCl3 ⇄ N2(g) + 3Cl2(g)

K is:

K = [N2] [Cl2]³ / [NCl3]²

Answer:

The rise and fall of the tides. Tides create a current in the oceans, which are strongest near the shore, and in bays and estuaries along the coast.

Winds drive currents that are at or near the ocean's surface.

Thermohaline circulation. This is a process driven by density differences in water due to temperature (thermo) and salinity variations in different parts of the ocean. Currents driven by thermohaline circulation occur at both deep and shallow ocean levels and move much slower than tidal or surface currents.

Currents affect the Earth's climate by driving warm water from the Equator and cold water from the poles around the Earth.

Explanation:

hope this helps

Collision theory explains how chemical reactions occur at the molecular level.

According to this theory, three "must-haves" are necessary for a reaction to occur: collisions between reacting molecules, sufficient energy to break the existing bonds, and proper orientation of colliding molecules.

Temperature affects the rate of reaction by increasing the number of collisions that occur between the reacting molecules.

This increased kinetic energy results in more successful collisions, leading to a higher reaction rate.

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All the options are correct. The catalytic converter reduces nitrogen monoxide, photochemical smog and also particulate pollution.

An internal combustion engine's emissions are reduced using a catalytic converter. The majority of contemporary cars and trucks use it.

Because there isn't enough oxygen to completely oxidize the carbon fuel in these engines into carbon dioxide and water, hazardous byproducts are created instead.

Catalytic converters are used in exhaust systems to provide a site for the oxidation and reduction of toxic by-products (like nitrogen oxides, carbon monoxide, and hydrocarbons) of fuel into less hazardous substances such as carbon dioxide, water vapor, and nitrogen gas.

Utilized in exhaust systems, catalytic converters allow for the conversion of harmful fuel byproducts like nitrogen oxides, carbon monoxide, and hydrocarbons into less dangerous ones like carbon dioxide, water vapor, and nitrogen gas.

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The solution's pH, which is still 0.756, is the same as its starting pH.

An acid-base titration is a quantitative analysis technique that precisely neutralises an acid or base sample with a standard base or acid solution of known concentration. To keep track of the development of the acid-base reaction, a pH indicator is used. The hydrogen ion concentration of a solution is represented by pH, which is the negative base-10 logarithm ("log" on a calculator).

The initial pH of 0.175 M HCl is calculated as follows:

pH = -log[H+]

[H+] = 0.175 M (since HCl is a strong acid, it dissociates completely in water)

pH = -log(0.175)

= 0.756.

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Answer:

16 km per hour

Explanation:

I hope this helped.

Answer:

Xenon

Explanation:

The core electrons of an element are the electrons that do not take part in the chemical reactions of the element

The electronic configuration of barium Ba is presented as follows;

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²

2+2+6+2+6+2+10+6+2+10+6

The valence electrons of boron are the 6s² electrons

The core electrons of boron are the; 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶

The electronic configuration of xenon, Xe, which is the previous noble element before barium, is presented as follows;

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ which is the same as the core electrons of barium

Therefore, the total number of electrons in xenon is equal to the number of core electrons in barium

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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According to the observations, work of scientist uses evidence while work of an engineer uses a practical approach.

Observations are defined as a set of statements or facts which are recorded while conducting an experiment.Observations are made through sensing changes in the variables of the experiment.

It is specifically defined as an act of knowing or recording the changes in the variables of the experiment.Recording observations holds importance as recording observations avoid the experiment to be repeated over and over again.

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The change in enthalpy (ΔH) for the reaction N2 + 3H2 → 2NH3 is 1844 kJ/mol.

To calculate the change in enthalpy (ΔH) for the given reaction, we need to determine the total energy change associated with breaking the bonds in the reactants (N2 and 3H2) and forming the bonds in the product (2NH3).

Reactants:

N≡N (nitrogen gas): 1 bond at 942 kJ/mol

H–H (hydrogen gas): 3 bonds at 432 kJ/mol each

Products:

N–H (ammonia): 6 bonds at 386 kJ/mol each

Now, let's calculate the energy change for the bonds broken and formed:

Energy change for bonds broken in the reactants:

2 N≡N bonds = 2 × 942 kJ/mol = 1884 kJ/mol

6 H–H bonds = 6 × 432 kJ/mol = 2592 kJ/mol

Energy change for bonds formed in the product:

6 N–H bonds = 6 × 386 kJ/mol = 2316 kJ/mol

Now, we can calculate the overall energy change:

ΔH = (Energy of bonds broken) - (Energy of bonds formed)

= (1884 kJ/mol + 2592 kJ/mol) - (2316 kJ/mol)

= 4160 kJ/mol - 2316 kJ/mol

= 1844 kJ/mol

Therefore, the change in enthalpy (ΔH) for the reaction N2 + 3H2 → 2NH3 is 1844 kJ/mol.

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A 7.26 × \(10^{-2}\)  M aqueous solution of chromium(II) iodide, \(CrI_{2}\), is hypertonic to red blood cells.

1. Red blood cells are typically isotonic with solutions that have an osmolarity of approximately 0.3 Osm/L (300 mOsm/L), which corresponds to a 0.15 M NaCl solution.
2. To determine the osmolarity of the \(CrI_{2}\) solution, we must first identify the number of particles (ions) that will be released into the solution when it dissolves. In this case, one \(CrI_{2}\) molecule dissociates into one \(Cr^{2+}\) ion and two I- ions.
3. Next, multiply the molarity of the \(CrI_{2}\) solution (7.26×\(10^{-2}\) M) by the number of ions it dissociates into (1 + 2 = 3 ions). This gives us an osmolarity of 7.26×\(10^{-2}\) M × 3 = 2.178×\(10^{-1}\) Osm/L (217.8 mOsm/L).

4. Compare the osmolarity of the \(CrI_{2}\) solution to that of red blood cells (217.8 mOsm/L vs. 300 mOsm/L). Since the \(CrI_{2}\) solution has a higher osmolarity, it is hypertonic to red blood cells.

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Answer:

4 moles

Explanation:

Thus, 64 grams of oxygen contains 4 moles.

The frequency of a wave is  2.80 × 10¹⁸  Hertz.  The wavelength is 0.10 nm and energy of this wave is  2.80 × 10¹⁸ .

Given that :

The frequency of a wave, v = 2.80 × 10¹⁸ Hz

wavelength = ?

formula for the wavelength is given as follows :

λ = c/ v

c = speed of light

λ = 3 × 10⁸ m/s /  2.80 × 10¹⁸ s⁻¹

λ = 1.07 × 10⁻¹⁰ = 0.10 nm

Energy of wave = h v

h = planks constant

E = 6.626 × 10⁻³⁴ J.s × 2.80 × 10¹⁸  s⁻¹

E = 18.55 × 10 ⁻¹⁶ J

Thus, The frequency of a wave is  2.80 × 10¹⁸  Hertz.  The wavelength is 0.10 nm and energy of this wave is  2.80 × 10¹⁸ .

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the study of quantitative relationships involved in chemical reactions C. Stoichiometry

Stoichiometry is the study of quantitative relationships involved in chemical reactions. It is a branch of chemistry that deals with the calculation of relative quantities of reactants and products in a chemical reaction, based on the balanced chemical equation. These calculations are essential for determining the number of substances needed for a reaction or the amount of products that can be obtained from a reaction.

A key aspect of stoichiometry is the conservation of mass, which states that the total mass of reactants must equal the total mass of products in a chemical reaction. This principle helps scientists predict the number of reactants needed or products formed in a reaction.

In stoichiometry, chemical equations are used as the basis for calculations. A chemical equation represents a chemical reaction and includes the chemical formulas of reactants and products, along with their coefficients to balance the equation. These coefficients indicate the stoichiometric ratio, or the ratio of molecules, atoms, or ions involved in the reaction.

Reactant refers to  substances that participate in a chemical reaction and are transformed into products. In stoichiometry, knowing the number of reactants is crucial for predicting the amount of products formed.

Theoretical yield is the maximum amount of product that can be obtained from a reaction, based on the stoichiometric ratios and the number of reactants available. It is an important concept in stoichiometry, as it helps scientists estimate the efficiency of a reaction and optimize reaction conditions. Therefore the correct option is C

The Question was Incomplete, Find the full content below :

It is the study of quantitative relationships involved in chemical reactions.

A. chemical equations

B. reactant

C. stoichiometry

D. theoretical yield

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Answer:The solution contains 0.50 mol or 55 g of CaCl2 . You know there are 2.0 mol of CaCl2 in 1 L of solution. (40.08 + 2 × 35.45) g=(40.08 + 70.90)

g=110.98 g

Explanation:

My I please have brainliest

110.98 grams of CaCl₂ is there present in 2.0 M CaC₂.

Calcium chloride is made up of calcium and chloride.

Given, that the solution contain 250 mL of 2.0 M CaCl2

You know there are 2.0 mol of CaCl2 in 1 L of solution.

(40.08 + 2 × 35.45) g

= (40.08 + 70.90)

=110.98 g

Thus, 110.98 grams of CaCl₂ is there present in 2.0 M CaC₂.

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Answer:

o an earthworm

Explanation:

Answer:

an earthworm

Explanation:

Answer:

cell

tissue

organ

organ system

Explanation:

the cell is the smallest

a tissue looks like a unit

an organ is multiple units

organ systems are the full body

Answer: 55,000

Explanation:

Scientific Notation: 5.5 x 10⁴

Standard form: move the decimal 4 places to the right

                         5 5 0 0 0 0.

                      =  55,000

Answer:

5.72×10^2

Explanation:

5.5×104

=55×104

=5720÷10

=572

=5.72×10^2

Answer:

This is an example of a random error because the timer is adding an extra second onto each runner's time, which is not an accurate representation of their true time. This error is not systematic, meaning that it does not affect all runners in the same way or add the same amount of time onto their times.

Explanation:

Give me brainliest if that helped :)

The molality of a solution of ethanol dissolved in methanol for which the mole fraction of ethanol is 0.181 is 2.009 mol/kg.

Molality (m) = (moles of solute) / (mass of solvent in kg) = (0.181 * total moles) / (mass of methanol in kg).

Given the mole fraction of ethanol (xE) = 0.181

Molality (m) = (xE * MWE) / (1000 * (1 - xE) * MWM)

Molality (m) = (0.181 * 46.07) / (1000 * (1 - 0.181) * 32.04

Molality (m) = 2.009 mol/kg

To calculate the molality, the mass of methanol and the total number of moles of the solution must be known. The mole fraction of ethanol can be used to find the number of moles of ethanol in the solution, which is 0.181 * total moles.

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Answer:

its true

Explanation:

because I made sure it was true and it is