An aqueous solution of nitric acid is standardized by titration with a 0.110 M solution of calcium hydroxide. If 21.1 mL of base are required to neutralize 23.8 mL of the acid, what is the molarity of the nitric acid solution? ? M Nitric acid

Answer:

A solution in which the solvent is water.

Explanation:

Something is dissolved in water.

Answer:

e. Na_I

Explanation:

a.  Na–O

b.  Na–F

c.  Na–Cl

d.  Na–Br

e.  Na–I

Bond polarity can be calculated, examining the Pauling scale electronegativity values of the two atoms. The difference between these values will determine the predominant type of bond between the respective atoms.

Therefore, Na-I would be least polar bond. (The difference in the electronegativies of the two atom is least)

Answer:

The final number of moles of gas in each bulb is 2.06 and 2.94 moles.

Explanation:

The number of moles can be calculated using Ideal Gas Law:

[tex] PV = nRT [/tex]     (1)

Where:

P: is the pressure

V: is the volume

n: is the number of moles

R: is the ideal gas constant  

Solving equation (1) for n:

[tex] n = \frac{PV}{RT} [/tex]

For bulb 1 we have:

[tex] n_{1} = \frac{P_{1}V_{1}}{RT_{1}} [/tex]

and for bulb 2:

[tex] n_{2} = \frac{P_{2}V_{2}}{RT_{2}} [/tex]

Dividing n₁ by n₂:

[tex] \frac{n_{1}}{n_{2}} = \frac{\frac{P_{1}V_{1}}{RT_{1}}}{\frac{P_{2}V_{2}}{RT_{2}}} [/tex]

Since V₁ = V₂ and P₁ = P₂ we have:

[tex] \frac{n_{1}}{n_{2}} = \frac{\frac{P_{1}V_{1}}{RT_{1}}}{\frac{P_{2}V_{2}}{RT_{2}}} [/tex]

[tex] \frac{n_{1}}{n_{2}} = \frac{T_{2}}{T_{1}} = \frac{350}{245} = 1.43 [/tex]                

[tex] n_{1} = 1.43n_{2} [/tex]   (2)

Also, we have that 5 mol of an ideal gas is injected into the system:

[tex] n_{1} + n_{2} = 5 \rightarrow n_{1} = 5 - n_{2} [/tex]    (3)

By entering equation (3) into (2) we have:

[tex] 5 - n_{2} = 1.43n_{2} [/tex]

[tex] n_{2} = 2.06 [/tex]    (4)

(4) into (3):

[tex] n_{1} = 5 - n_{2} = 5 - 2.06 = 2.94 [/tex]      

Therefore, the final number of moles of gas in each bulb is 2.06 and 2.94 moles.

I hope it helps you!

Answer:

[tex]6.5X10^-^5~\frac{mol}{L}[/tex]

Explanation:

For this question, we have to start with the ionization equation for [tex]Ag_2CrO_4_(_s_)[/tex], so:

[tex]Ag_2CrO_4_(_s_)~<->~2Ag^+~_(_a_q_)~+~CrO_4^-^2_(_a_q_)[/tex]

With this in mind we can write the Ksp expression:

[tex]Kps~=~[Ag^+]^2[CrO_4^-^2][/tex]

Additionally, for every mole of [tex]CrO_4^-^2[/tex]  formed, 2 moles of [tex]Ag^+[/tex] are formed. We can use "X" for the unknown concentration of each ion, so:

[tex][CrO_4^-^2]~=~X[/tex]  and  [tex][Ag^+]~=~2X[/tex]

Now, we can plug the values into the Ksp expression:

[tex]1.12x10^-^1^2~=~(2X)^2(X)[/tex]

Now we can solve for "X" :

[tex]1.12x10^-^1^2~=~4X^3[/tex]

[tex]X^3=\frac{1.12X10^-^1^2~}{4}[/tex]

[tex]X=(\frac{1.12X10^-^1^2~}{4})^(^1^/^3^)[/tex]

[tex]X=6.5X10^-^5~\frac{mol}{L}[/tex]

I hope it helps!

Answer: Through years of studying and research ;

Graphite has shown that in weak and quantizing magnetic fields it is  material is a highly anisotropie diamagnetic substance whose non-oscillating part of the magnetic suscepti- bility weakly depends on magnetic field.

Explanation:

Diamagnetism is a (very) weak form of magnetism which is caused (induced) by a change in the orbital motion of electrons mostly  due to an applied magnetic field.

Answer:

Explanation:

HSO4 --> (NH4)2SO4

Yes it is a redox reaction.

H is +1

S is +7

on the other side..

N is -3

H is +1 (always +1, thats part of the oxidation rule)

S is +6

O is always -2

So what happened? Sulfur lost one electron, so it is reduced. This is why is a redox reaction.

Answer:

The concentration of the solution is 1.068×10⁻⁴M

Explanation:

Hello,

To find the concentration of the solution, we'll have to use Beer-Lambert law which states absorption is directly proportional to the concentration of the solution.

Beer-Lambert law = A = εCL

A = absorption = 2 - log₁₀%T = 2 - log₁₀(34)

A = 2 - 1.5314 = 0.47

A = 0.47

ε = molar absorption coefficient = 4400

C = concentration of the solution

L = path length = 1cm

A = εcl

C = A / εl

C = 0.47 / 4400 × 1

C = 1.068×10⁻⁴M

The concentration of the solution is 1.068×10⁻⁴M

Answer:

0.374 L

Explanation:

Step 1: Given data

Mass of silver nitrate (solute): 15.89 g

Molarity of the solution: 0.250 M

Step 2: Calculate the moles of silver nitrate

The molar mass of silver nitrate is 169.87 g/mol.

[tex]15.89g \times \frac{1mol}{169.87g} = 0.09354mol[/tex]

Step 3: Calculate the volume of the solution

The molarity is equal to the moles of solute divided by the liters of solution.

[tex]M = \frac{moles\ of\ solute }{volume\ of\ solution} \\volume\ of\ solution = \frac{moles\ of\ solute}{M} = \frac{0.09354mol}{0250mol/L} = 0.374 L[/tex]

Due to the significant figures rules, we keep 3 significant figures.

Answer:

0.37416 L

Explanation:

M = mol/L

molar mass ( for AgNO₃ ) = 169.87 g

moles = given mass/molar mass

15.89 g/169.87 = .09354

.250 = .09354/L

= 0.37416

Answer: Heterogeneous (Colloid)

Explanation: This is because your solution is a colloid. A colloidal solution has particles between 40 and 900 nm and as the laser light shines through the paint and Water mixture, the paint particles scatter the light because of the Tyndall Effect (Named after the physicist John Tyndall). A Colloidal Solution is a heterogeneous solution that looks like its homogeneous but is a mixture of very small particles that don't really become a solution.

A small amount of red paint is mixed with water. When a laser pointer shines through the mixture, the beam is clearly visible in the mixture. This mixture is a Heterogeneous.

A mixture is a substance made by combining two or more dissimilar chemical compounds that are not chemically linked in chemistry. When two or more substances are physically combined, their identities are maintained, and the mixture takes the shape of solutions, suspensions, or colloids.

Chemical elements and compounds, among others, can be mechanically blended or mixed to create mixtures without causing any chemical bonding and other chemical change, preserving the chemical characteristics and makeup of each ingredient. A small amount of red paint is mixed with water. When a laser pointer shines through the mixture, the beam is clearly visible in the mixture. This mixture is a Heterogeneous.

Therefore, the mixture is Heterogeneous mixture.

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#SPJ2

Answer:

O2

Explanation:

Answer:

o2

Explanation:

edge

Answer:

It's well Explained below.

Explanation:

First of Excess product of CaCO_3 would be produced due to the fact that there would not be enough CaCl_2 to react with Na_2•CO_3. The main purpose of having stoichiometric quantities is for us to know the correct amount or near the correct amount of each reactant in order to create a product that will be close to the theoretical amount and thus have a higher percent yield.

Answer:

The Answer is B. Mass and distance

Explanation:

Trust me lol

Answer:mass and distance

Explanation:

Answer:

The limiting reactant between is NH₃.

Explanation:

The reaction of the Solvay process is:

CO₂(g) + NH₃(g) + H₂O(l) + NaCl(s) ⇄ NaHCO₃(s) + NH₄Cl(aq)   (1)              

Since the water and the sodium chloride are in excess we need to find the number of moles of CO₂ and NH₃ at STP (1 amt, 273 K).

[tex] PV = nRT \rightarrow n = \frac{PV}{RT} [/tex]

Where:

n: is the number of moles

P: is the pressure = 1 atm

V: is the volume

T: is the temperature = 273 K

R: is the gas constant = 0.082 L*atm(K*mol)

For CO₂ we have:

[tex] n = \frac{PV}{RT} = \frac{1 atm*15.0 L}{0.082 L*atm/(K*mol)*273 K} = 0.67 moles [/tex]

And for NH₃ we have:

[tex] n = \frac{PV}{RT} = \frac{1 atm*10.0 L}{0.082 L*atm/(K*mol)*273 K} = 0.45 moles [/tex]

From the equation (1) we have that 1 mol of CO₂ reacts with 1 mol of NH₃, so from that ratio we have:

[tex] n_{CO_{2}} = \frac{\eta_{CO_{2}}}{\eta_{NH_{3}}}*n_{NH_{3}} = \frac{1}{1}*0.45 moles} = 0.45 moles [/tex]

From above we have that 1 mol of NH₃ reacts with 0.45 moles of CO₂, and we have 0.67 moles of CO₂, hence the limiting reactant is NH₃.

Therefore, the limiting reactant between CO₂ and NH₃ is NH₃.

I hope it helps you!  

Answer:

five(5) hydrogen are formed

Answer:

3d and 4th

Explanation:

Carbohydrates general formula (CH2O)n.

Not 1st one because it has NH2-group.

2nd - C3H6O4, also it is acid.

3d - C3H6O3

4th - C6H12O6

Among the given compounds only compound present in 3rd option is a carbohydrate.

Carbohydrates are the organic molecules which are made up of oxygen atom, carbon atom and hydrogen atom and general molecular formula of carbohydrates is CₙH₂ₙOₙ, where n is the number of atoms.

In the carbohydrate molecule, alcoholic group and aldehyde groups may present.

Hence compound C is carbohydrate.

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Answer:

C. A positive and a negative ion

Explanation:

Acids and bases are made up of charged particles known as ions. The ions present in acids are oppositely charged and are held together by strong electrostatic forces. When acids or bases are dissolved in water, the electrostatic forces holding their individual molecules together are weakened and these ions are free to move apart in a process known as dissociation. Dissociation occurs because of the attraction between the positive and negative ions in the acid and bases and the negative and positive polarity of water.

For example, when an acid like hydrochloric acid is dissolved in water it dissociates into positive and negative ions as follows:

HCl(aq) -----> H+ + Cl-

When a base like sodium hydroxide is dissolved in water, it dissociates into positive and negative ions as follows:

NaOH(aq) ----> Na+ + OH-

Answer:

yeah C is correct

Explanation:

Answer:

3.18 (w/w) %

Explanation:

In the problem, you can find mass of NaClO knowing the reaction of NaClO with Na₂S₂O₃ is:

NaClO + 2Na₂S₂O₃ + H₂O → NaCl + Na₂S₄O₆ +2NaOH + NaCl

Where 1 mole of NaClO reacts with 2 moles of Na₂S₂O₃

Moles of thiosulfate in the titration are:

0.0101L ₓ (0.042mol / L) = 4.242x10⁻⁴ moles of Na₂S₂O₃

Thus, moles of NaClO in the initial solution are:

4.242x10⁻⁴ moles of Na₂S₂O₃ ₓ (1mol NaClO / 2 mol Na₂S₂O₃) = 2.121x10⁻⁴ moles NaClO

As molar mass of NaClO is 74.44g/mol, mass of 2.121x10⁻⁴ moles are:

2.121x10⁻⁴ moles ₓ (74.44g / mol) = 0.0158g of NaClO

As mass of bleach is 0.496g, mass percent is:

0.0158g NaClO / 0.496g bleach ₓ 100 =

Answer:

Francium

Explanation:

The atomic radius increases from top to bottom in a group, and decreases from left to right across a period.

so francium (Fr) is the largest atom or has highest radii.

Hope this helps & please mark as brainiest!

Answer:

Francium has the largest atomic radius.

The general trend for atomic radii is increasing from top to bottom and decreasing from left to right so the one with the largest atomic radius will be in the bottom left of the periodic table.

Answer:

(+)-cholesterol = 71.88%

(-)-cholesterol = 28.12%

Explanation:

Asuming 1 gram of sample is dissolved in 1mL of water and the sample cell was 1dm long.

Enantiomeric excess is defined as the amount of pure enantiomer in a sample. The formula is:

ee = [α]mixture / [α]pure enantiomer.

Replacing:

ee = 14° / 32°×100 = 43.75%

As the sample is 14°, There is an excess of (+)-cholesterol and 56.25% is a 1:1 mixture of enantiomers.

That means percent composition of enantiomers is:

Answer:

Choice B, C, and D.

Explanation:

Choice A is not true in general. Here's a way to think about that. Consider a very special equilibrium where the concentration of reactants and products are indeed equal. When one of the external factors (such as temperature) changes, the equilibrium will shift towards either side of the reaction. More products will be converted to reactants, or vice versa. Either way, in the new equilibrium, the concentration of the reactants and products will not be equal any more.

Choice B should be considered with choice C and D in mind.

Choice C is indeed correct. The reaction rate would not be zero unless all the reactants were used up or taken out of the system. That's not what happens in an equilibrium. Instead, when reaction rate is plotted against time, the graph for reactions in both directions will eventually flat out at a non-zero value.

Choice D explains why even though choice C is correct, the concentration of a system at equilibrium stays the same. At the equilibrium, reactions in both directions are still happening. However, during the time it takes for the forward reaction use up some reactant particles, the reverse reaction would have produced these particles again. On a large scale, there would be no observable change to the concentration of each species in the equilibrium. Therefore, choice B is also correct.

Answer:

because according to the electron sea model they are good conductor of heat so,they can be used for cooking.

Answer:

x = 86.908 amu

Explanation:

Average mass of isotope =  85.4678 amu

Rb-85 = 84.9117 amu, Percentage = 72.15% = 0.7215

Other isotope = x, Percentage = 100 - 72.15 = 27.85% = 0.2785

Average mass = (Percentage * Mass of Rb-85)  + (Percentage * Mass of Rb-87)

85.4678 = (0.7215 * 84.9117) + (0.2785 * x)

85.4678 = 61.2638 + 0.2785x

0.2785x = 24.204

x = 24.204 / 0.2785

x = 86.908 amu

86.908 amu

It is given that:

Average atomic mass of Rb = 85.4678 amu.

Also the mass of Rb-85 = 84.9117 amu and its Percentage = 72.15% = 0.7215

Let the mass of other isotope (Rb-87) = x

So, Percentage of other isotope (Rb-87) = 100 - 72.15 = 27.85% = 0.2785

Average mass = (Percentage * Mass of Rb-85)  + (Percentage * Mass of Rb-87)

85.4678 = (0.7215 * 84.9117) + (0.2785 * x)

85.4678 = 61.2638 + 0.2785x

0.2785 x = 24.204

x = 24.204 / 0.2785

x = 86.908 amu

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Answer:

[tex]pH=4.6[/tex]

Explanation:

Hello,

In this case, the dissociation of hypochlorous acid is:

[tex]HClO_4\rightleftharpoons H^++ClO_4[/tex]

Therefore, the law of mass action for equilibrium is written as:

[tex]Ka=\frac{[H^+][ClO_4^-]}{HClO_4} =3.00x10^{-8}[/tex]

And can also be written introducing the reaction extent ([tex]x[/tex]):

[tex]3.00x10^{-8}=\frac{x*x}{0.0200-x}[/tex]

Thus, solving for [tex]x[/tex] we obtain:

[tex]x=2.45x10^{-5}M[/tex]

Which is also equal to the concentration of H⁺ in the solution. Thereby, the pH turns out:

[tex]pH=-log([H^+])=-log(2.45x10^{-5})\\\\pH=4.6[/tex]

Which is substantiated by the fact it is about an acid (pH lower than 7).

Regards.

pH=4.6  

Given:

Ka= [tex]3.00*10^{-8}[/tex]

[HClO]=0.0200 M

The dissociation of hypochlorous acid is:

[tex]HOCl[/tex] ⇌  [tex]ClO^- +H^+[/tex]

Therefore, the law of mass action for equilibrium is written as:

[tex]K_a= \frac{[H^+] [ClO^-]} {[HOCl]} \\[/tex]

At equilibrium [tex][H^+] \text{and} [ClO^-][/tex]be x and [HClO] be [0.0200-x]

On substituting the values in given equation we will get:

[tex]3.00 * 10^{-8}=\frac{[x]*[x]}{[0.0200-x]}\\\\3.00 * 10^{-8}=\frac{x^2}{[0.0200-x]}\\\\x=2.45*10^{-5} M[/tex]

This is also equal to the concentration of H⁺ in the solution. Therefore, the pH turns out:

[tex]pH= -log[H^+] \\\\pH= -log [2.45 * 10^{-5}]\\\\pH=4.6[/tex]

Hence, the pH of an aqueous solution is 4.6.

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Answer:

Ductility is the how stretchable a solid is under tension. If a solid is ductile, then it can be stretched into wire-like (think rubber band). Ductility is similar to malleability and physical components of solids.

Explanation:

Answer:

Photon of light

Explanation:

According to Bohr's model of the atom, electrons in atoms are found in specific energy levels. These energy levels are called stationary states, an electrons does not radiate energy when it occupies any of these stationary states.

However, an electron may absorb energy and move from one energy level or stationary state to another. The energy difference between the two energy levels must correspond to the energy of the photon of light absorbed in order to make the transition possible.

Since electrons are generally unstable in excited states, the electron quickly jumps back to ground states and emits the excess energy absorbed. The frequency or wavelength of the emitted photon can now be measured and used to characterize the transition. This is the principle behind many spectrometric and spectrophotometric methods.

Explanation:

N2O4(g)  <----------> 2NO2(g)

Before proceeding,

A chemical equilibrium can be defined as a condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs.

Statement 1.

This statement is false. Equilibrium is not about equal concentrations but rather zero change in concentration of the reactants and products.

Statement 2.

This statement is True in chemical equilibrium; the forward and reverse reactions occur at equal rates.

Statement 3.

This statement is False. The rate constant for the forward reaction is not equal to the rate constant of the reverse reaction.

Statement 4.

The concentration of NO2 divided by the concentration of N2O4 is NOT equal to a constant. To obtain a constant value irregardless of the concentrations, the concentration of NO2 must be squared. This comes from the stoichiometry of the reaction

Kc= [NO2]2 / [N2O4]

This statement is false.

Answer:

an atom of mercury has a different mass than an atom of copper.

Explanation:

I took the exam and got it right.

Answer: The molarity of solution is 0.221 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in L

moles of [tex]NaI[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{49.8g}{149.89g/mol}=0.332mol[/tex]

Now put all the given values in the formula of molality, we get

[tex]Molarity=\frac{0.332mol}{1.50L}[/tex]

[tex]Molarity=0.221mol/L[/tex]

Therefore, the molarity of solution is 0.221 M

Answer and Explanation:

The water is a polar solvent which dissolves into the LiBr molecules and converts into [tex]Li^+[/tex] and [tex]Br^-[/tex] ions far from the solid also into the solution, when they are hydrated.

Now, the complete words are as given below:-

The [tex]K^+[/tex] and [tex]I^-[/tex] ions at the surface of the solid are pulled into the solution by the polar water molecules, where the hydration process surrounds separate ions with water molecules.

LiBr has been the ionic compound and has been dissociated in the water by the force of the polar water molecules. The water molecules that have been polar in nature exert the force onto the ionic compounds and help in the dissociation.

At the dissociation surface of the solid KI molecules, are pulled into the solution by the polar water molecules, where the hydration process surrounds ions and separates them with water molecules.

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Answer:

NaCl in water; ion-dipole interaction

Explanation:

Sodium chloride is an ionic solid. Ionic solids dissolve in water due to ion dipole interaction. Ionic solids are composed of an ion pair which are strongly bound by electrostatic interaction between the oppositely charged ions in the solid state.

When an ionic substance is dissolved in water, the positive ion interacts with the negative end of the dipole in water while the negative ion interacts with the positive end of the dipole in water. Hence the ions are pulled apart by this ion-dipole interaction and the crystal structure of the solid collapses as the ionic solid dissolves in water.

Sodium chloride is an ionic solid. Interaction between the sodium ion and the negative end of the dipole in water as well as chloride ion and the positive end of the dipole in water leads to the dissolution of sodium chloride solid in water. This is the strongest solute-solvent interaction in the list.

When The strongest solute-solvent interactions and the interaction the correct option is A NaCl in water; ion-dipole interaction

Sodium chloride is an ionic solid. Ionic solids liquefy in water due to ion-dipole interaction. Ionic solids are formed of an ion team that is strongly bound by electrostatic interaction between the differently delegated ions in the solid-state.

When an ionic substance is disbanded in water, the positive ion interacts with the negative end of the dipole in the water while the opposing ion interacts with the positive end of the dipole in water. Therefore the ions are dragged apart by this ion-dipole interaction and also when the crystal configuration of the solid collapses as the ionic solid dissolves in water.

Sodium chloride is an ionic solid. The interchange between the sodium ion and the negative future of the dipole in water as well as the chloride ion and the positive end of the dipole in water leads to the abolishment of sodium chloride solid in water. This is the strongest solute-solvent exchange on the list.

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