A gas at constant volume has a pressure of 4. 50 atm at 200k. What will be the pressure of the gas at 250k?

The balanced chemical equation in a basic solution will be,

[tex]BrO^{-} + 4OH^{-} +4Fe^{+3}[/tex] → [tex]BrO_{3} ^{-} + 4H_{2} O+4Fe^{+2}[/tex]

The reaction in which oxidation and reduction reaction takes place simultaneously is called redox reaction or oxidation - reduction reaction .

Rules for the balanced chemical equation in a basic solution are :

Therefore, the balanced chemical equation in a basic solution will be,

[tex]BrO^{-} + 4OH^{-} +4Fe^{+3}[/tex] → [tex]BrO_{3} ^{-} + 4H_{2} O+4Fe^{+2}[/tex]

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With respect to bonding and electrical conductivity, respectively, sulfur hexafluoride, sf6(g), would be described as "covalent and a nonconductor" because sulfur hexafluoride would be a covalent compound since neither fluorine nor sulfur are metallic elements and aqueous solutions containing covalent bonding do not conduct electricity.

The ability of an electrical charges or heat to move through a material is measured by its conductivity. A material is considered a conductor if it offers relatively minimal resistance to the transfer of thermal or electric energy.

The electricity is conducted by-

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The average person will absorb no more than 500 mg of calcium at one time.

So, option B is correct one.

For maximum absorption, no more than 500 mg of calcium should be taken in a single dose. The absorption of the minerals is actually lower by taking too high an amount of calcium at one time from a supplement. Calcium is absorb from the food. If you think you need more a calcium supplement , ask your doctor or dietitian to recommend one. Taking too high amount of calcium at one time, particularly from a supplement , can actually lower the absorption of the mineral.

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Moderate alcohol consumption is no more than [tex]One[/tex] alcoholic drink(s) daily for adult women and up to [tex]Two[/tex] drink(s) daily for adult men.

What is an alcohol?

Alcohol is an organic compound containing a hydroxyl group and a carbon atom; Alcohol can be an intoxicant found in alcoholic beverages.

An alcoholic drink (also called an alcoholic beverage, adult beverage, or simply a drink) is a drink that contains ethanol, a type of alcohol that acts as a drug and is produced by fermentation of grains, fruits, or other sources of sugar.

The consumption of alcoholic drinks, often referred to as "drinking", plays an important social role in many cultures. Most countries have laws regulating the production, sale, and consumption of alcoholic beverages.

So, according to the scientific studies, the alcoholic consumption for women in a day is not more then one and for men is not for two drink(s)

1 Drink includes:

For beer: 355 ML

For Wine: 148 ML

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The final answer is 11.71

The concentration of a given solution (H2NCH2CH2NH2)  is 0.314 M

pa1 = 6.848

a1 = 1.42 X [tex]10^{-7}[/tex]

Pa2 = 9.928

a2 = 1.18 X [tex]10^{-10}[/tex]

The equation is given as;

NH2CH2CH2NH2 + H2O ---> NH2CH2CH2NH3+ + OH-

Initial 0.314 0 0

Change -x +x +x

Equilibrium 0.314 -x x x

b1 = Kw / Ka2 = 10^-14 / 1.18 X 10^-10 = 8.47 X 10^-5 = [NH2CH2CH2NH3+][OH-] / [NH2CH2CH2NH2]

8.47 X 10^-5 = x^2 / 0.314 -x

8.47 X 10^-5 X 0.314 - 8.47 X 10^-5x = x^2

x^2 - 2.66 X 10^-5 + 8.47 X 10^-5x = 0

on solving

x = 0.0051 M = [NH2CH2CH2NH3+] = [OH-]

[NH2CH2CH2NH2] = 0.314 - 0.0051 = 0.3089 M

For the second dissociation,

NH2CH2CH2NH3+ + H2O ---> +NH3CH2CH2NH3+ + OH-

Initial 0.0051 0 0.0051

Change -x +x +x

Equilibrium 0.0051 -x x 0.0051 +x

b2 = Kw / Ka1 = 10^-14 / 1.42 X 10^-7 = 7.04 X 10^-8 = [+NH3CH2CH2NH3+] [OH-] / [+NH3CH2CH2NH2]

7.04 X 10^-8 = x (0.0051+x) / (0.0051-x)

We may ignore x in the denominator as b2 is very low

7.04 X 10^-8 = x (0.0051+x) / (0.0051)

3.59 X 10^-10 = 0.0051x + x^2

x = 7.039 X 10^-8 M

[OH-] = 0.0051 + x = 0.0051 approx

[+NH3CH2CH2NH3+] = x = 7.039 X 10^-8 M

NH2CH2CH2NH3+ = 0.0051 +x = 0.0051 M approx

pOH = --log [OH-] = -log 0.0051 = 2.29

pH = 14 - pOH = 11.71

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For breaking alkenes, liquid bromine was utilized. When liquid bromine is added to the finished product and it turns clear, it has reacted.

The principal test used to determine the organic compound's unsaturation in a qualitative examination of organic compounds is the bromine water test. It aids in determining the compound's functional group.

Unsaturated hydrocarbons and bromine water engage in an additional process. When the double bond breaks, bromine is added. The reaction's final result has no color.

However, there is no addition reaction when bromine water combines with saturated hydrocarbons. As a result, the solution's hue is unchanged and remains brown.

So, a qualitative test for saturated and unsaturated hydrocarbons is a reaction with liquid bromine.

The presence of unsaturated hydrocarbons, or functional groups with double bonds, can be seen in the mixture when it transforms into a clear

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The order of reaction with respect to a is 4 and with respect to b is 5 for a reaction that obeys the rate law.

The order of reaction is equal sum of power of concentration of the each reactant present in the reaction  that obeys the rate law . The order of individual reactant or species present in the rate law is equal to the power of the of concentration of the respective species or reactant .

Example : If rate law is given as,

rate = k[tex][a]^{4} [b]^{5}[/tex]

The order of reaction with respect to a is 4 and with respect to b is 5 for a reaction that obeys the rate law.

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Answer:

This is the answer

Explanation:

charges passed = current x time = 10 x 3 x 60

= 1800 C

mole of charge = 1800 / 96500

= .01865 moles

Au+3 contains 3 positive charges

3 mole of charge will deposit 1 mole of Au .01865 moles will deposit .01865 / 3 mole

= 6.2167 x 10-3 moles.

Prostaglandins locally acting chemicals are derived from arachidonic acid.

What does arachidonic acid produce?

Is prostaglandins a local hormone?

What is arachidonic acid found in?

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The percentage of volume of ethanol is 9.5%.

Volume/volume percentage (v/v% or percent v/v) is a unit used to express how much of a material is present in a solution. It is defined as the volume of the solute divided by the sum of the volumes of the solution, multiplied by one hundred. Examples: The average alcohol concentration (v/v%) of wine is 12 percent.

The formula used to get the volume of ethanol in percentages is

Percent of volume of ethanol = (volume of solute / total volume) *  100

Percent volume of Ethanol = (volume of ethanol  / total volume)  * 100

                                            =  95mL  / 1000mL  *  100

                                            = 9.5%

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Answer: Homogeneous catalyst

The concentration of 57.10 ml solution is Hbr that is completely titrated is 0.326.

Concentration is the total amount of substance in one unit of a solution. The concentration is more when there is less solvent.

Concentration = mass / volume

From the formula of dilution M1V1 = M2V2

Given that the volume 1 is 57.10

Volume 2 is 35.00

Mass is 0.200.

M2 is ?

Putting the values in the equation:

0.200 x 57.10 = m2 x  35.00 = 0.326

m2 = 0.326

Thus, the  concentration of a 57. 10 ml solution of Hbr is 0.326 m.

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The group of unsaturated hydrocarbons which 2 carbons are double bonded together, with H bonded to the left, and C H 2 bonded below left, above right, and below right is derived from Alkenes

Organic compounds are compounds which contains carbon and hydrogen

Some few classes or organic compounds or hydrocarbons are as follows:

So therefore, the group of unsaturated hydrocarbons which 2 carbons are double bonded together, with H bonded to the left, and C H 2 bonded below left, above right, and below right is derived from Alkenes

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Answer:

The answer is A.) Alkene

All the answers in that section are:

Alkene

Aromatic Hydrocarbon

Alkene

Alkyne

Explanation:

Here's the picture as proof. Hope it helps!

Balanced chemical equation for reaction of hydronium ions with calcium carbonate will be as follows:

2H3O+ (aq) + CaCO3 (s) => Ca2+ (s) + 3H2O (l) + CO2 (g)

In this balanced chemical equation, acidic aqueous solution of hydronium ion (H3O+) reacts with calcium carbonate salt (CaCO3) resulting in the formation of calcium cation (Ca2+) an alkali, that results in neutralization of excessive acid. It also forms liquid water (H2O) along with liberation of carbon dioxide gas (CO2).  All acids stronger than hydrogen carbonate, provide their calcium salts dissolved in water yielding carbon dioxide, because a bare hydrogen ion has no chance of surviving in water.

To balance this chemical equation, 2 molecules of hydronium ions react with 1 molecule of calcium carbonate resulting  in formation of 1 molecule of calcium cation, 3 molecules of water and 1 molecule of carbon dioxide. The reaction proceeds at room temperature.

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There are 61.06 grams of of sodium chloride in its aqueous solution.

An aqueous solution is the one in which solvent is always water. Water is the most used universal solvent.

According to the question,

Volume of water = 550 ml = 0.55 L

Molarity of solution = 1.90 M

Formula for molarity = moles of solute / volume of solvent

1.90 =  moles of solute / 0.55 L

Moles of solute = 1.90 × 0.55 L = 1.045 moles

Now, moles = mass / molar mass

molar mass of NaCl = 58.44 g/mol

Therefore, 1.045 = mass / 58.55 g/mol

Hence, mass in grams = 1.045 × 58.44 g/mol

Mass = 61.07 grams

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The actual  theoretically yield from this reaction is 86.5 grams.

What is theoretically yield?

∵ The percentage yield = (actual yield/theoretical yield) * 100.

To calculate the theoretical yield from the balanced reaction:

             CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,

It is clear that 1 mole of CaCO₃ reacts with 2 mole of HCl to produce 1 mole of CaCl₂, 1 mole of CO₂, and 1 mole H₂O.

to calculate the no. of moles of 95.0 g CaCO₃

n = mass/molar mass = (95.0 g)/(100.0869 g/mole) = 0.95 mol.

Using cross multiplication:

1 mole of CaCO₃ produce  → 1 mole of CaCl₂, from stichiometry.

∴ 0.95 mole of CaCO₃ produce → 0.95 mole of CaCl₂.

∴ The mass of CaCl₂ (theoretical yield) = (no. of moles) * (molar mass)                         ⇒(0.95 mole)*(110.98  g/mole) = 105.34 g.

∵ The percentage yield = (actual yield/theoretical yield)*100.

The percentage yield = 82.15%, theoretical yield = 105.34 g.

∴ The actual yield of CaCl₂ = (The percentage yield)(theoretical yield)/100

                                 = (82.15%)(105.34 g)/100 = 86.53 g ≅ 86.5 g.

So, the actual  theoretically yield from this reaction is 86.5 grams.

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Nitrous acid, hno2, has an acid dissociation constant - ka of 7. 1 ✕ 10-4. what are [h3o ], [no2-], and [oh -] in 0. 40 m hno2 - 4829 M [OH^-] = 1.439 x 10^-14 M

The acid dissociation constant (Ka) is used to differentiate between strong and weak acids. Strong acids have very high Ka values. The Ka value is determined by examining the equilibrium constant for acid dissociation. The acid dissociates more readily as the Ka increases.

The original molecular definition of an acid, according to Arrhenius, is a molecule that dissociates in an aqueous solution, releasing the hydrogen ion H+ (a proton): HA A + H+. acid dissociation constant is an equilibrium constant for this dissociation reaction.  

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When Na3po4 dissolves in water to produce an electrolytic solution. The osmolarity of a 2. 0 × 10-3 m Na3po4 solution is 0.008osmol/L.

Osmolarity is defined as the number of osmoles of solute particles per unit volume of the solution.

In other words osmolarity is the multiple if molarity

Osmolarity = i× molarity

Here i represents the van't Hoff factor,

[tex]Na_{3}PO_{4}[/tex] ⇒ [tex]3Na^{+} + PO_{4} ^{-}[/tex]

3  Moles of [tex]Na_{} ^{+}[/tex] + 1 mole [tex]PO_{4} ^{-}[/tex] = 4

The number of moles of particles of solute produced in solution are actually called osmoles.

As a result, the van't Hoff factor will be equal to

i=4 Moles ions produced (osmoles) 1mole [tex]Na_{3} PO_{4}[/tex] .dissolved =4

Since we know that,

[tex]Na_{3} PO_{4}[/tex] = [tex]2.0 * 10^{-3} M[/tex]

Osmolarity =

[tex]4*2.0*10^{-3} M[/tex] = [tex]8.0 * 10^{-3} osmol L -10s[/tex]

Thus, the Osmolarity of given solution is 0.008 osmol/L.

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Answer:

[tex]\frac{1 m}{100 cm}[/tex]

Explanation:

The final answer has a different set of units. In particular, meters (m) changes to centimeters (cm). To make this change, you need to multiply the first value by proportions.

When writing these proportions, it is important that they are arranged in a way that allows for the cancellation of units. For instance, since m is located in the denominator, it must be located in the numerator of the conversion.

Proportion:

1 m = 100 cm

The full expression:

As you can see, the old unit (m) cancels out and you are left with cm in the denominator.

The given pH scale range from [tex]0-3[/tex] indicates the strong acid.

The pH scale, which ranges from [tex]0 -14[/tex], was developed by Sorensen to quantitatively define the strength of an acid and a base.

A pH value indicates the amounts of hydrogen ions and, hydroxide ions present. The negative logarithm of the hydrogen ion concentration is referred to as pH and is represented by:

[tex]pH = -log [H^{+} ][/tex]

For acids, the pH value is always less than [tex]7[/tex].

For bases, the pH value is always more than [tex]7[/tex].

For neutral solution, pH value is equal to [tex]7[/tex].

Thus, for the provided pH scale range [tex]0-3[/tex], it represents strong acid which will give large concentration of protons on dissociation. since lower pH value indicates higher concentration of protons created by an acid.

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Answer:

Explanation:

1. Write down the balanced equation

2. Use molar mass of O2 (32g/mol) divided by the given mass to derive the amount of mols

3. multiply the answer by 2/3 (divide by 3 then multiply by 2), to ensure the mols are in correct proportion

4. Use given molar mass and multiply it by the amount

5. Make sure to use proper significant digits (3 in this case) and units :)

The wavelength of the electron is 1085nm.

The wavelength refers to the horizontal distance that is covered by a wave. Now we know that according to the Bohr Model of the atom, electrons move from a higher to a lower energy level leading to the emission of a ray of light with a characteristic wavelength.

Now Using the formula;

1/λ = RH (1/n2^2 - 1/n1^2)

Where;

λ = wavelength

n1 = initial energy level

n2 = final energy level

RH = Rydberg's constant

1/λ = 1.097 * 10^7(1/3^2 - 1/6^2)

1/λ =  1.097 * 10^7( 0.111 - 0.027)

λ =  1.085 * 10^-6 m or 1085nm

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Brass is an alloy of copper and zinc and is durable, malleable and sonorous.

Alloys are products which are obtained from a mixture of two or more metallic elements.

Alloys are preferred to the individual elements because they combine the desirable properties of their component elements.

An example of an alloy is brass.

Brass is mixture of copper and zinc. It combines the shiny and anti-rust properties of zinc with the durability and sonorous property of copper.

It very sonorous and malleable and is used in many musical instruments.

In conclusion, alloys are produced by mixing two or more metals together.

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Answer:

iron deficiency

Explanation:

The 3.4 moles of Ammonia (NH₃) have 2.0475 x 10²⁴ molecules of it.

We know,

The number of moles is given by

[tex]n =\frac{m}{M}[/tex]

The number of molecules is the product of a number of moles and Avogadro's number[tex]N_A[/tex]

Number of molecules of NH₃ = [tex]n \times N_A[/tex]

                                                 = 3.4 x 6.022 x 10²³

                                                 = 2.0475 x 10²⁴ molecules

Hence, 3.4 moles of Ammonia have 2.0475 x 10²⁴ molecules

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The complete and balanced molecular equation is-

K₂SO₄(aq) + SrI₂(aq) → KI(aq)+ SrSO₄(s)

Both sides of the reaction must have an equal amount of atoms in each element to balance the equation.

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Balanced molecular equation is :

K₂SO₄(aq) + SrI₂(aq) → KI(aq)+ SrSO₄(s)

What is Balanced equation?

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There are approximately 6.02 × 10²³ atoms of phosphorus in one mole of 30.974 grams of phosphorus (option A).

The number of atoms of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number. That is;

no of atoms = no of moles × 6.02 × 10²³

According to this question, there are 30.974 grams of phosphorus in one mole of phosphorus. The number of atoms can be calculated as follows:

no of moles of P = 30.974g ÷ 31g/mol = 0.99mol

number of atoms = 0.99 mol × 6.02 × 10²³

number of atoms = 6.02 × 10²³ atoms

Therefore, there are approximately 6.02 × 10²³ atoms of phosphorus in one mole of 30.974 grams of phosphorus.

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Answer:

the total number of molecules

Answer:

C.) The total number of atoms of each element.

Explanation:

An equation is balanced when there is an equal amount of each element on both sides of a reaction. If these values are not identical, they can be changed by adding coefficients to alter the amount of each molecule. By modifying the amount of molecules within the reaction, you can make the total number of atoms of each element equal on both sides.