What species is reduced in the following reaction?

2NH3 + OCl− ↔ N2H4 + H2O + Cl−

The atomic number 35 and symbol Br identify the chemical element bromine. The third-lightest halogen, it is a volatile reddish-brown liquid that easily evaporates to produce a vapour of a similar color. Its characteristics fall in between iodine and chlorine.

Bromine's electron configuration is [Br]4s^2.3d^10.4p^5

A maximum of two electrons can fit into a s subshell, six into a p subshell, ten into a d subshell, and fourteen into a f subshell.

The maximum number of electrons in a subshell and the number of orbitals may both be calculated using the angular momentum quantum number, l, which stands for various subshells. These quantities can be found using the formulas 2 ( 2 l + 1 ) and 2 l + 1 correspondingly.

The s subshell is represented by a l of 0, the p subshell by a l of 1, the d subshell by a l of 2, and the f subshell by a l of 3.

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The density of the metal cube is  7.874 kg/m³

Density is a word we use to describe how much space an object or substance takes up means its volume in relation to the amount of matter in that object or substance means its mass and another way to put it is that density is the amount of mass per unit of volume and if an object is heavy and compact it has a high density

Here given data is metal cube with a volume = 20 cubic centimeters and mass = 157.48 gram so we have to find density of the metal cube = ?

So, density = mass/volume means ρ = m/V

Density = 157.48 gram/20 cubic centimeters

Density = 7.874 kg/m³

The density of the metal cube is  7.874 kg/m³

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Answer: 63.6166 amu (atomic mass units)

Explanation: When an element X is written in the form of X-N, N will the atomic mass of that element. So we have copper with a mass of 63 and 65. We are given percentages of each one. 69.17/100 of the copper atoms will be of weight 63 while 30.83/100 will be of weight 65. Keep in mind that amu does not actually mean weight but I'm just using it as a tool to help explain the general concept. Assume you have 100 copper atoms, and you need to find the average atomic mass for them, if you do this you will solve the problem. Due to the fractions, 69.17 of them will be 63 amu and the rest will be 65. So do 69.17*63+65*30.83 and divide by one hundred. By doing this you will get 63.6166. If my answer doesn't make sense, search up how to calculate weighted averages

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Answer: The Rx should have been filled with 24 tablets, so it is false that the Rx was for 20 tablets

Explanation:  25mg x2 = 50mg x3 (three times a day).  So patient takes 150mg day x 4 days= 6 tablets/day for 4 days.  Rx should contain 24 tablets.  If the pharmacy sent 20, the order wasn't calculated correctly.  

The products of the chemical reaction are sodium hydroxide and acetone. This is because acetone undergoes aldol condensation. Synthetic reactions occur when two or more reactants combine to form a single product.

Sodium hydroxide is completely ionic and contains sodium and hydroxide ions. The hydroxide ion makes sodium hydroxide a strong base and reacts with acids to form the corresponding salts with water. The chemical formula for acetone is CH32CO. Also known as propanone or dimethyl ketone, it is the smallest and simplest ketone. It forms an iodoform when it reacts with iodine in the presence of NaOH. Thus it can be seen that iodoform is formed in the presence of NaOH.

Hydrochloric acid and caustic soda interact to form salts and release heat. As you can see table salt and water are the results of the interaction of two highly aggressive compounds. These compounds are ultimately harmless and even beneficial to humans. The reaction between benzaldehyde and acetophenone undergoes cross-aldol condensation in the presence of di-I. Sodium hydroxide. In this reaction, benzaldehyde has no alpha hydrogen.

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Answer:

Solid

Explanation:

Solid state because carbon dioxide can go sublimation so generally at relatively lower temperature it is found in solid form but at room temperature,ie, 25 to 30°C it is found in gaseous state.

The threat to living things increases with decreasing wavelength. While there are risks associated with longer wavelengths as well, live tissue is easily harmed by very short wavelengths like X-rays and gamma rays.

The DNA within a living cell can be harmed by some types of electromagnetic radiation, which is radiation present in several types of light waves, including ultraviolet light as well as X-rays. Radiation-induced DNA damage can cause cell death or cancer.

Higher-frequency waves have greater energy, and they come in a variety of wavelengths and frequencies. The atmosphere of Earth absorbs gamma rays that come from space. They can obliterate living cells, bring about mutations, and result in cancer. Ironically, gamma rays can be employed to treat cancer despite their lethal effects.

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The pH of a 1 × 10-² molar aqueous solution of H2SO4 is 2.

pH is the degree of acidity or alkalinity of a solution. The pH of a solution can be calculated by using the following formula;

pH = - log {H+}

According to this question, the concentration of 1 × 10-² molar aqueous solution of H2SO4. The pH of this solution can be calculated as follows:

pH = - log {0.01}

pH = 2

Therefore, the pH of the aqueous solution is 2.

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Mass can neither be created nor destroyed.

Mass is described as the quantity of matter in a physical body. It can also be a measure of the body's inertia, the resistance to acceleration when a net force is applied.

The law of conservation of mass helps us to understand that mass can neither be created nor destroyed, although it may be rearranged in space, or the entities associated with it may be changed in form.

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products for a low energy thermodynamic process.

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The kinetic energy of the liberated electron is 1.73 x 10⁻¹⁹ J.

The total energy of the light is the sum of the kinetic energy of the electron and work function of the metal.

E = K.E + Ф

where;

The total energy of the photons of light is calculated as follows;

E = hf

where;

E = (6.626 x 10⁻³⁴) x (9.62 x 10¹⁴)

E = 6.37 x 10⁻¹⁹ J

1 eV = 1.6 x 10⁻¹⁹ J

E = 6.37 x 10⁻¹⁹ J = 3.98 eV

The kinetic energy of the liberated electron is calculated as;

E = K.E + Ф

K.E = E - Ф

K.E = 3.98 eV - 2.9 eV

K.E = 1.08 eV = 1.73 x 10⁻¹⁹ J

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Ryan calculates that he requires 4 ice cubes for 250mL of hot tea to reach the optimal drinking temperature by using the specific heat capacity of tea.

A substance's potential to hold heat is indicated by its specific heat capacity. This substance size reflects the amount of heat required to raise a certain volume of a material's temperature by one Kelvin. Specific heat capacity is a distinguishing feature of every substance and is useful for material identification.

Given:

Final temperature of system is 57.8℃

dT1 = 79.1 - 57.8 = 21.3℃

dT2 = 0 - (-8.33) = 8.33℃

dT3 = 57.8 - 0 = 57.8℃

Mass of tea, m1 = 250.0mL = 250.0g = 0.250kg

Specific heat capacity of tea, C1 = 4186 J/kg℃ = Specific heat capacity of water

Specific heat capacity of ice, Ci = 2090 J/kg℃

Mass of each ice cubes, m of i = 18.8g

Latent heat of fusion of ice, Lf = 334 kJ/kg

To find:

No. of ice cubes required = ?

Calculations:

Suppose equilibrium temperature is T, then

Heat released by Tea = Heat gained by Ice

Q1 = Q2

m1x C1x dT1 = mi x Ci x dT2 + mi x Lf + mi x Cw x dT3

0.250x 4186 x 21.3 = mi x (2090 x 8.33 + 3.34 x [tex]10^4[/tex] + 4186 x 57.8)

mi = 0.250 x 4186 x 21.3 / (2090 x 8.33 + 3.34 x [tex]10^4[/tex] + 4186 x 57.8)

mi = 0.0761kg = 76.1g

Mass of ice required = 76.1g

Number of ice cube required will be:

n = Total mass of ice/mass of each ice cube

n = 76.1/18.8

n = 4.04 ice cubes = 4.0 ice cubes

Result:

Ryan requires 4 ice cubes to bring 250mL of hot tea to the optimal drinking temperature.

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The kinetic energy that the liberated electron has in eV based on the given values is :

10.28 eV.

A photoelectron's maximum kinetic energy is given by

                     Emax = hf - W

here given,

f = 3.62 x 10¹⁵ Hz

W = 4.70 eV

 by recalling the equation for a photoelectron's maximum kinetic energy with given values,

  Emax = hf - W

             = ((4.14 × 10⁻¹⁵eV.s)(3.62 x 10¹⁵ Hz)) - (4.70 eV)

             = 10.28 eV

As a result, we discovered that the maximum kinetic energy of electrons is 10.28eV.

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The correctly balanced chemical reaction of [tex]H_2SO_4[/tex] with HI is [tex]H_2SO_4 + 8HI -- > H_2S + 4I_2 + 4H_2O[/tex]

The equation of chemically balanced reactions must obey the law of conservation.

According to the law of conservation, the number of participating atoms in a reaction must be conserved. In other words, the number before must be the same as after the reaction.

However, the law opines that the forms of atoms may change after reactions.

Sulfuric acid reacts with hydrogen iodide to produce hydrogen sulfide, iodine molecules, and water according to the following equation:

[tex]H_2SO_4 + HI -- > H_2S + I_2 + H_2O[/tex]

However, the equation is yet to obey the law of conservation. The correctly balanced equation of the reaction would be: [tex]H_2SO_4 + 8HI -- > H_2S + 4I_2 + 4H_2O[/tex]

The above equation shows that the number of each atom in the reactants is the same as in the product.

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Which of the following shows the correctly balanced chemical reaction reacting with HI?

a. [tex]H_2SO_4 + 8HI -- > H_2S + 4I_2 + 4H_2O[/tex]

b. [tex]H_2SO_4 + 4HI -- > H_2S + 2I_2 + 2H_2O[/tex]

c. [tex]H_2SO_4 + HI -- > H_2S + I_2 + H_2O[/tex]

Answer:

Balancing a chemical equation involves a certain amount of trial and error. In general, however, you should follow these steps:

Count each type of atom in reactants and products. Does the same number of each atom appear on both sides of the arrow? If not, the equation is not balanced, and you need to go to step 2.

Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances. Use the smallest coefficients possible. Warning! Never change the subscripts in chemical formulas. Changing subscripts changes the substances involved in the reaction. Change only the coefficients.

Repeat steps 1 and 2 until the equation is balanced.

Explanation:

The alkoxide group responsible for the nucleophilic attack on the carbonyl group (more precisely the carbon atom) during peptide bond cleavage in chymotrypsin belongs to the serine 195 side-chain.

Because only serine and threonine of all the amino acids contain hydroxy-groups, only they qualify as possible answers. When we look at the structure of the chymotrypsin, we can see that there is a serine 195, so it must be it. Indeed, during peptide bond cleavage, histidine 57 side-chain deprotonates the serine 195 side chain, turning into a nucleophilic hydroxy-group, which can then attack the carbonyl group, held in place by the glycine 193's residue.

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The osmotic pressure is the least amount of pressure that must be applied to a solution in order to block the passage of the solution's pure solvent through a semipermeable membrane. Additionally, it is described as a measurement of a solution's propensity to osmotically absorb a pure solvent.

Temperature and concentration both have an impact on osmotic pressure. Temperature and solute concentration both have an impact on how much pressure is generated when water moves through a membrane. Osmotic pressure rises with temperature and concentration.

The osmotic pressure formula is

Op = C*R*T*i

where, Osmotic pressure is unknown, therefore OP

C = moles/liter of solution multiplied by the molarity of the solution.

Mass of sucrose or molar mass of sucrose equals a mole of sugar.

sucrose mass=52g

Sucrose's molar mass is 342g/mol (C12H22O11).

thus, 52/342 = 0.152 moles of sucrose.

Moles per liter of solution equals the solution's molarity.

117mL*1L/1000mL = 0.117L when converting from 117mL to liters where 1000mL = 1L

the solution's molarity is 0./0.117=1.299M.

R = 0.0821 L atm/mol/K, the universal gas constant.

20 degrees Celsius are converted to Kelvins using the formula T = absolute temperature = degrees in Kelvin. 20+273=293K

The van't Hoff Factor equals 1.

subsequently, the OP = 1.299*0.0821*293*1=31.24atm.

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Answer:

Sink

Explanation:

Density is defined as the amount of substance per unit volume, and is given by the formula below:

Density= mass ÷volume

Given that mass and volume, calculate the density of the substance:

Density of substance

= 14.5 ÷8

= 1.8125 g/mL

Compare the density of the substance with that of the medium it is place in, for example water:

The density of water is 0.9998395 g/mL, thus the density of the substance is greater than that of water.

Since the substance is more dense than water, it will sink in water.

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The molar mass of the triprotic acid used is 186.4 g/mol.

To calculate the amount of triprotic acid, we must first calculate the number of moles (n) of sodium hydroxide (NaOH) expended during the titration. To do this, we can use its molarity (c = 0.1063 M) and volume (V = 19.74 mL = 0.01974 L):

c = n/V ⇒ n = c*V

n(NaOH) = 0.1063 M * 0.01974 L

n(NaOH) = 0.0021 mol

Because 1 mol of a triprotic acid requires 3 moles of sodium hydroxide to be neutralized, the amount of the acid in the 20.00 mL sample will be:

n(acid) = n(NaOH) / 3

n(acid) = 0.0021 mol / 3

n(acid) = 0.0007 mol

Now we use a proportion to calculate the amount of acid present in a 250.0 mL sample:

0.0007 mol : 20.00 mL = X : 250 mL

X = 0.0007 mol * 250.0 mL / 20.00 mL

X = 0.00875 mol

Finally, we use the mass (m) and the number of moles to calculate the molar mass (M):

n = m/M ⇒ M = m/n

M = 1.631 g / 0.00875 mol

M = 186.4 g/mol

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The amine will remain in the upper organic (ethyl acetate) layer, while the phenol and the carboxylic acid will be in the lower aqueous layer. Effectively, a separation of amine will be achieved using basic extraction technique.

Sodium hydroxide (NaOH) makes a basic solution when dissolved in water. It will react with the acidic components of the analyzed mixture during extraction. Amine is also basic, so it will not interact with sodium hydroxide and will remain in the organic layer. Carboxylic acid is, as the name implies, acidic, and thus will be neutralized by sodium hydroxide, forming a water-soluble sodium carboxylate salt, which means that it will be removed from the organic layer. Phenol is also acidic enough to be neutralized by sodium hydroxide, so it will also form a water-soluble salt (sodium phenoxide) and be removed from the organic layer.

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The inorganic chemical with the formula MnO2 is manganese dioxide. Pyrolusite, a naturally occurring mineral and the primary manganese ore and component of manganese nodules, is this dark-brown to blackish solid.

Manganese is a chemical element with the atomic number 25 and the letter Mn in its name. In minerals, it is a hard, brittle, silvery metal that is frequently present next to iron. Manganese is a transition metal used mostly in the production of stainless steels and other industrial alloys.

Assume X weighs 100

Moles of Mn

= 54.94 /

63.3 (1 /54.94 ) = 1.51

Moles of O

= 16.00 /

36.7 (1 /16.00 ) = 2.29

the number of moles divided by the smallest (1.15 mol)

Mn O

1.15 /1.15 = 1.00

2.29 /1.15 = 1.99

Empirical Formula

MnO2

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Investigation B, Step 2 only is the one in which a chemical change will most likely occur and is denoted as option D.

This is referred to as a type of reaction which is characterized by the formation of a new substance as a result of the synthesis or decomposition of a substance which is referred to as the reactant through various methods and techniques.

In the Investigation B, Step 2, the sugar solution is heated on a burner until the solution thickens and turns brown thereby forming caramel. The chemical change in this scenario is depicted as the caramel which is produced in the process known as caramelisation.

There is a new substance formed which is therefore the reason why option D was chosen as the most appropriate choice.

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Answer:

the answer is BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB

Explanation: why? I don't know because I just piked a answer.

vaporization's enthalpy is 40.88 kJ/mol.

The amount of energy (enthalpy) required to turn a portion of a liquid into a gas is known as the enthalpy of vaporization (symbol Hvap), also known as the (latent) heat of vaporization or heat of evaporation.

Enthalpy of vaporization  ∆Hvap

T1 = 25 + 273 = 298 K

T2 = 100 + 273 = 373 K

Cp(1) = 0.07529 kJ/K.mol

Cp(2) = 0.03358 kJ/K.mol

So dHvap at 100 oC would be,

dHvap = dHvap at 25 oC + (Cp(2) - Cp(1)(T2-T1)

= 44.01 + (0.03358 - 0.07529)(373-298)

= 40.88 kJ/mol

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Answer:

Where's the actual question so we can help?

Explanation:

I don't see a question I can help with

1. The total energy of the universe is zero.

2. Because each part of the Earth's system is interrelated, changes in one part can lead to changes in one or all other parts.

For example, when a volcano erupts, lava can flow to the surface and block nearby valleys.

This new obstacle affects the local drainage system by creating lakes and diverting rivers.

Volcanic ash and gases that can be released during eruptions can be blown high into the atmosphere and affect the amount of solar energy that can reach the surface. Temperatures across the hemisphere could drop as a result.

3. Solar radiation warms the atmosphere and is fundamental to atmospheric composition.

Atmospheric radiation is the flow of electromagnetic energy between the sun and the surface of the earth influenced by clouds aerosols and gases in the earth's atmosphere. This includes both solar radiation sunlight and longwave thermal radiation.

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Based on the cryoscopic constant and the ebullioscopic constant of benzene, we can calculate that the boiling point of this solution will be 82.33 °C.

For this calculation, we require both the cryoscopic constant (Cf = 5.12 °Ckg/mol) and the ebullioscopic constant (Cb = 2.52 °Ckg/mol) for benzene. These describe the shifts in benzene's freezing and boiling points based on the molality of the solution (with benzene as the solvent).

Because we know that the change in benzene's freezing point is 5.53 °C - 1.00 °C = 4.53 °C, we can now calculate the molality of the solution and use it to calculate the boiling point of the same solution.

Δt(freezing) = m * Cf ⇒ m = Δt / Cf = 4.53 °C / 5.12 °Ckg/mol = 0.885 mol/kg

Δt(boiling) = m * Cb = 0.885 mol/kg * 2.52 °Ckg/mol = 2.23 °C

t (boiling) = 80.10 °C + 2.23 °C = 82.33 °C

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Answer:

Explanation: its cold, so energy is being released to try to reach equal temp with the outside area of the cold pack

Gravitational force between the moon and the astronaut change are decrease

The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them

We can visualize the effect mathematically via the equation for newton's law of gravitation

Fgrav = Gm₁m₂/r₂

From this relationship, we can see that force Fgrav and square of the distance rare inversely proportional as one increases the other decreases

Therefore, as the distance between the astronaut and earth increases, the magnitude of the gravitational force will decrease

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Gases are most ideal at high temperature and low pressure.

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The Newton Cradle is device that could be used to explain the Newton third law of motion but its working could be hampered by friction.

We need to recall that Isaac Newton was a scientist whos research centered a lot around the reason for motion. In his studies, we can see that force is the reason for motion. As such, an object tends to move when the object have been acted upon by a system of unbalanced forces.

The Newton Cradle is a system that could be used indicate the principle of the conservation of linear momentum as we can see from the Newton third law. Recall that from the Newton third law; action and reaction are equal and opposite.

Having said this, we can see that the force that acts on one end of the sphere is transmitted across the spheres such that the last sphere across also moves upwards. The sphere could be prevented from working by friction.

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Answer:

basic neural acid neural acid basic