Answers
Answer:
10.71%
Explanation:
The dissociation of acetic acid can be well expressed as follow:
CH₃COOH ⇄ CH₃COO⁻ + H⁺
Let assume that the prepared amount of the aqueous solution is 14mM since it is not given:
Then:
The I.C.E Table is expressed as follows:
CH₃COOH ⇄ CH₃COO⁻ + H⁺
Initial 0.0014 0 0
Change - x +x +x
Equilibrium (0.0014 - x) x x
Recall that:
Ka for acetic acid CH₃COOH = 1.8×10⁻⁵
∴
\(K_a = \dfrac{[x][x]]}{[0.0014-x]}\)
\(1.8*10^{-5} = \dfrac{[x][x]]}{[0.0014-x]}\)
\(1.8*10^{-5} = \dfrac{[x]^2}{[0.0014-x]}\)
\(1.8*10^{-5}(0.0014-x) = x^2\)
\(2.52*10^{-8} -1.8*10^{-5}x = x^2\)
\(2.52*10^{-8} -1.8*10^{-5}x - x^2 =0\)
By rearrangement:
\(- x^2 -1.8*10^{-5}x +2.52*10^{-8}= 0\)
Multiplying through by (-) and solving the quadratic equation:
\(x^2 +1.8*10^{-5}x-2.52*10^{-8}= 0\)
\((-0.00015 + x) (0.000168 + x) =0\)
x = 0.00015 or x = -0.000168
We will only consider the positive value;
so x=[CH₃COO⁻] = [H⁺] = 0.00015
CH₃COOH = (0.0014 - 0.00015) = 0.00125
However, the percentage fraction of the dissociated acetic acid is:
\(= \dfrac{ 0.00015}{0.0014}\times 100\)
= 10.71%
Related Questions
Which actions will change an object’s weight, but not it’s mass?
A. Breaking the object
B. Compressing the object
C. Immersing the object in water
D. Placing the object on a different planet
PLZ HELP
Answers
Answer:
D
Explanation:
The weight of an object will change if the object is brought farther away from Earth, or placed on a different planet since the force of gravity on the object will change. However, the mass of the object will remain the same regardless of whether the object is on Earth, in outer space, or on the Moon. hope this helps have a good day :)
. A gas has a solubility of 0.028 g/L at a pressure of 3.5 atm. At what pressure would its solubility be at 0.2 g/L?
Answers
Answer:
To find the pressure at which the solubility of the gas would be 0.2 g/L, we can use the concept of Henry's Law. Henry's Law states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid.
The equation for Henry's Law is:
S = k * P
Where:
S is the solubility of the gas in the liquid (in g/L)
k is the Henry's Law constant (which depends on the specific gas and liquid)
P is the partial pressure of the gas above the liquid (in atm)
We can set up a proportion to find the unknown pressure (P2) when the solubility (S2) is 0.2 g/L:
S1 / P1 = S2 / P2
Substituting the given values:
0.028 g/L / 3.5 atm = 0.2 g/L / P2
Now we can solve for P2:
P2 = (0.2 g/L * 3.5 atm) / 0.028 g/L
P2 = 24.5 atm
Therefore, at a pressure of 24.5 atm, the solubility of the gas would be 0.2 g/L.
is there anything smaller than an atom
Answers
Answer:
subatomic particles are actually small than atoms
Yes, particles such as protons, neutrons, and electrons that make up the atom are smaller than atoms.
HELP ME SOLVE THIS NEUTRAL REDOX REACTION USING HALF METHOD, I BEEN STUCK ON IT FOR 2 HOURS
H6TeO6 + Br2 = TeO2 + BrO3-
Answers
The balanced equation of the redox reaction is given as follows:
5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺What is the balanced equation of the reaction?The balanced equation of the reaction is determined using the half-reaction method.
The given equation of the redox reaction is:
H₆TeO₆ + Br₂ ----> TeO₂ + BrO₃⁻
Reduction half-reaction:
H₆TeO₆ → TeO₂
The oxidation state of Te changes from +6 to +4, showing that it has lost gained electrons.
H₆TeO₆ → TeO₂ + 2e⁻
Oxidation half-reaction:
Br₂ → BrO₃⁻
The oxidation state of Br changes from 0 to +5, showing that it has lost five electrons.
Balancing the electrons transferred and the atoms by adding electrons, H₂O, and H⁺ to the appropriate sides:
Br₂ + 6 H₂O → 2 BrO₃⁻ + 12 H⁺ + 10 e⁻
The number of electrons transferred in both half-reactions balanced is by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:
5 (H₆TeO₆ → TeO₂ + 2 e⁻) → 5 H₆TeO₆ → 5 TeO₂ + 10 e⁻
2 * (Br₂ + 6H₂O → 2 BrO₃⁻ + 12 H⁺ + 10e⁻) → 2 Br₂ + 12 H₂O → 4 BrO₃⁻ + 24 H⁺ + 20 e⁻
The two half-reactions are added together and the electrons are canceled out to obtain the balanced redox reaction:
5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺
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Please. The name of the formula
Answers
Answer:
can't read that language of the title man maybe next time man
Explanation:
what's the bolded stuff as the title that is supposed to be english so that you would now what formula you are solving for
For the reaction
4PH3(g)↽−−⇀6H2(g)+P4(g)
the equilibrium concentrations were found to be [PH3]=0.250 M, [H2]=0.580 M,
and [P4]=0.750 M.
What is the equilibrium constant for this reaction?
c=
Answers
The equilibrium constant for the reaction given that the equilibrium concentration of [PH₃] = 0.250 M, [H₂] = 0.580 M, and [P₄] = 0.750 M is 7.3
How do I determine the equilibrium constant?From the question given above, the following data were obtained:
Equation: 4PH₃(g) ⇌ 6H₂(g) + P₄(g)Concentration of PH₃, [PH₃] = 0.250 MConcentration of H₂, [H₂] = 0.580 MConcentration of P₄, [P₄] = 0.750 MEquilibrium constant (K) =?The equilibrium constant for the reaction can be obtained as shown below:
Equilibrium constant = [Product]ᵐ / [Reactant]ⁿ
Where
m and n are coefficients of products and reactants respectivelyEquilibrium constant = [H₂]⁶[P₄] / [PH₃]⁴
Equilibrium constant = [(0.580)⁶ × 0.750] / (0.250)⁴
Equilibrium constant = 7.3
Thus, the equilibrium constant for the reaction is 7.3
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The enthalpy of vaporization for methanol is 35.2 kJ/mol. Methanol has a vapor pressure of 1 atm at 64.7 oC. Using the Clausius-Clapeyron equation, what is the vapor pressure for methanol at 34.1 oC? Give your answer in atmospheres, to the third decimal point.
Answers
The vapor pressure is obtained as 3.7 atm.
What is the Clausius-Clapeyron equation?The Clausius-Clapeyron equation is the equation that we could use to obtain the vapor pressure of a solution at any temperature. Of course we would always have two different temperatures to work with.
Hence;
ln(P1/P2) = ΔHvap/R (1/T2 - 1/T1)
P1 = initial pressure
P2 = final pressure
ΔHvap = enthalpy of vaporization
T2 = final temperature
T1 = initial temperature
ln(1/P2) = 35.2 * 10^3/8.314 (1/338 - 1/307)
ln(1/P2) = 4234(0.00295 - 0.00326)
ln(1/P2) = -1.31
1/P2 = e^-1.31
P2 = 1/e^-1.31
P2 = 3.7 atm
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Balance an equation
Answers
Answer:
no
Explanation:
s ss s s s s s s s s s s s s ss s s s s dkfkf f f f f f f f
What is the difference between weight and mass?
Weight depends on density and mass depends on gravity.
Mass depends on gravity and weight depends on volume
O Weight depends on gravity and mass is constant.
Both weight and mass are constant
Answers
Key differences between Mass and Weight
The weight may vary, but the mass is constant.
The mass is measured in kilograms (kg), while the weight is measured in newtons (N).
Mass refers to the amount of matter an object has, but the weight refers to the force of gravity acting on an object.
Answer:
C. Academic English
Explanation:
just a side note, it'd be alot easier if you put the answers like this:
A. Urban English
B. Standard English, and et
Explanation:
Complete the first column of the table.Express your answer using three significant figures.
Answers
Avodaro's law says that under same circunstances (same pressure and temperature) same volume of different gases containt same amount of molecules or V/n=constant or:
\(\frac{V_1}{n_{1_{}}}=\frac{V_2}{n_2}\)You will have to replace and solve the equation above for each cell of the table they are aswing. for the first column
\(V_1=\frac{V_2}{n_2}n_1=\frac{416mL}{0.916\text{ mol}}1.19\text{ mol =540 ml }\)does titanium need to be processed before being used?
Answers
Answer:yes
Explanation:….
Answer:
It can be processed. It just has to be processed in batches, because it's not iron
Explanation:
100mL of a solution that is simultaneously 15.6 mg/mL malonic acid, 3.38 mg/mL MnSO4 • H2O, and 0.03% starch
Calculate the g and mL necessary to make this solution
Answers
52.6g and 23.8mL necessary 100mL of a solution that is simultaneously 15.6 mg/mL malonic acid, 3.38 mg/mL MnSO4 • H2O, and 0.03% starch to make this solution.
What is malonic acid?
The chemical formula of malonic acid is CH2(COOH)2. Malonates include the ionized form of malonic acid as well as its esters and salts. Because it interferes with respiration, malonic acid is extremely harmful, especially in cases of cancer and other degenerative disorders (the making of ATP in mitochondria). Malonic acid is a somewhat unstable substance with limited practical uses. Beetroot contains its calcium salt, however the acid itself is often made by hydrolyzing diethyl malonate.
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According to one acid base theory the water acts as ?
Answers
Mass is a(n) ____ property.
Answers
Answer:
mass is an extensive property..
Please Help ASAP - 100 points + Brainliest!!!!!
Answers
The heat that have been evolved is 888.4 kJ while the internal energy is 13 J
What is heat of combustion?The heat of combustion is typically determined through a calorimetric experiment, in which a substance is burned in a calorimeter and the heat released is measured and quantified. The heat of combustion can also be calculated from the chemical equation for the combustion reaction, using the principle of the conservation of energy.
Number of moles of the propane = 25 g/62 g/mol
= 0.4 moles
If 1 mole of propane gives out 2221 kJ
0.4 moles of propane would give out 0.4 moles * 2221/1
= 888.4 kJ
We know that;
ΔE = q + w
= 25 - 12
= 13 J
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Calculate the areas and densities. Report the answers in the correct units.
a. the area of a rectangle with sides measuring 3 x 10^1 cm and 3 x 10^-2 cm
b. the area of a rectangle with sides measuring 1 x 10^3 cm and 5 x 10^-1 cm
c. the density of a substance having a mass of 9 x 10^5 g and a volume of 3 x 10^-1 cm3
d. the density of a substance having a mass of 4 x 10^-3 g and a volume of 2 x 10^-2 cm3
Answers
Considering the defintion of area of a rectangle and definition of density, you obtain the following areas and densities:
a. the area of the rectangle is 9×10⁻¹ cm².
b. the area of the rectangle is 5×10⁻²cm².
c. the density of the substance is 3×10⁶ g/cm³.
d. the density of the substance is 0.2 g/cm³.
Area of a rectangleA rectangle is a flat geometric figure with four sides, of which two sides that are opposite parallel to each other have the same length and the remaining two have another length.
The area of a rectangle is the product of the two contiguous sides of the rectangle:
Area of a rectangle= a×b
where a and b are the measures of the two sides.
Definition of densityDensity is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
a. Area of the rectangleIn this case, you know that the rectangle has:
a side of the rectangle is 3×10¹ cm.a side of the rectangle is 3×10⁻² cm.Then, the area of the rectangle can be calculated as:
Area of the rectangle= 3×10¹ cm× 3×10⁻² cm
To multiply numbers in scientific notation, you multiply the numbers that are not powers of 10 and add the exponents that are powers of ten. In this case:
Area of the rectangle= (3× 3)×10¹⁻² cm²
Area of the rectangle= 9×10⁻¹ cm²
Finally, the area of the rectangle is 9×10⁻¹ cm².
b. Area of the rectangleIn this case, you know that the rectangle has:
a side of the rectangle is 1×10³ cm.a side of the rectangle is 5×10⁻¹ cm.Then, the area of the rectangle can be calculated as:
Area of the rectangle= 1×10³ cm× 5×10⁻¹ cm
Solving
Area of the rectangle= (1× 5)×10³⁻¹ cm²
Area of the rectangle= 5×10⁻²cm²
Finally, the area of the rectangle is 5×10⁻²cm².
c. Density of the substanceIn this case, you know:
mass= 9×10⁵ gvolume= 3×10⁻¹ cm³Replacing in the definition of density:
density= 9×10⁵ g÷ 3×10⁻¹ cm³
Solving:
density= 3×10⁶ g/cm³
Finally, the density of the substance is 3×10⁶ g/cm³.
c. Density of the substanceIn this case, you know:
mass= 4×10⁻³ gvolume= 2×10⁻² cm³Replacing in the definition of density:
density= 4×10⁻³ g÷ 2×10⁻² cm³
Solving:
density= 0.2 g/cm³
Finally, the density of the substance is 0.2 g/cm³.
SummaryIn summary, you obtain the following areas and densities:
a. the area of the rectangle is 9×10⁻¹ cm².
b. the area of the rectangle is 5×10⁻²cm².
c. the density of the substance is 3×10⁶ g/cm³.
d. the density of the substance is 0.2 g/cm³.
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Which of the following do sound waves generally travel most
quickly through?
Answers
Answer:
Sound waves travel faster through solids, because they can better transmit the soundwaves to your eardrum faster since they are closer together than air.
Answer:
Sound waves generally travel most quickly through gases.. Sounds can travel through air and water but not through solids. Sound waves travel hope this helps!
Sodium sulfate forms several hydrates. A sample of one of these hydrates is heated until all the water is removed. What is the formula of the original hydrate if it loses 43% of its mass when heated?
Answers
Answer:
Na₂SO₄•(H₂O)₆.
Explanation:
The mass that is lost when the sample is heated is water.
Let's assume we have 100 g of the hydrate:
43 grams would be water (H₂O), while the rest (100-43=57) would be sodium sulfate anhydrous (Na₂SO₄).
We convert both those masses to moles, using their respective molar masses:
H₂O ⇒ 43 g ÷ 18 g/mol = 2.39 molNa₂SO₄ ⇒ 57 g ÷ 142.04 g/mol = 0.40 molWe can write those results as (Na₂SO₄)₀.₄₀•(H₂O)₂.₃₉. Now we just need to multiply those numbers so that they become integers.
If we multiply both coefficients by 5 we're left with (Na₂SO₄)₂•(H₂O)₁₂.
Simplify and thus the final answer is Na₂SO₄•(H₂O)₆.
If an atom has an atomic number of 10 and an atomic mass number of 20, how many protons, neutrons, and electrons does it have?
Answers
Question 9
5 pts
Which energy transfer is correctly matched?
Fusion in the sun: chemical to light and heat
Lighting a match: heat energy into chemical energy
a cell phone: thermal to electrical
Turning on a ceiling fan: electrical to mechanical
Answers
Answer:
fusion in the sun
Explanation:
I know this because I am currently talking this test and I know it cause I did it
Answer:Turning on a ceiling fan: electrical to mechanical
I took the test and Fusion in the sun: chemical to light and heat Lighting a match: sound energy into chemical energy were the wrong answers.
For a concave mirror, incident light beams through C will reflect:
(a) back through C
(b) through F
(c) parallel to PA
Answers
Answer:
c
Explanation:
1) Wood has a density of 5.53g/cm3. What must the volume of 33.3 g of wood?
Answers
Answer:
6.021cm^3Explanation:
d=5.53 g/cm^3
m=33.3g
v=?
we know that,
d=m/v
or, v=m/d
or, v=33.3/5.53
•°• v=6.021cm^3
The volume of the wood is its mass divided by density. The volume of the 33.3 g wood with the density of 5.53 g/cm³ is 6.02 cm³.
What is density ?Density of a substance is the measure of its mass per unit volume. It describes how closely particles are packed. The density of a substance depends on the bond type, temperature and pressure.
If a substance is dense than water, it will sink on water. If it is less dense than water it will float on water. The ratio of the density of an object to that of water is called specific gravity.
Given that, density of wood = 5.53 g/cm³
mass = 33.3 g
volume = mass/density
= 33.3 g/ 5.53 g
= 6.02 cm³
Therefore, the volume of the wood is 6.02 cm³.
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The volume of a balloon filled with H2 at 275 torr is compressed from 6.40 L to 3.20
Lat a constant temperature.
What is the final pressure (in atm) of the the balloon?
Answers
The final pressure of the gas of initial pressure 275 torr is 550 torr.
What is pressure?Pressure is the force acting normally per unit area to the surface of an object
To caluclate the final pressure of the balloon, we use the formula below.
Formula:
P₂ = P₁V₁/V₂.......... Equation 1Where:
P₁ = Initial pressureV₁ = Initial volumeV₂ = Final volumeP₂ = Final pressureFrom the question,
Given:
P₁ = 275 torrV₁ = 6.4 LV₂ = 3.2 LSubstitute these values into equation 1
P₂ = (275×6.4)/3.2P₂ = 550 torrHence, the final pressure is 550 torr.
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pls help me in solve this question in chemistry
Answers
The chemical equation for the decomposition of water is:
\(2 H_2O -- > 2 H_2 + O_2\)
To balance this equation, we need to count the number of atoms of each element on both sides of the equation.
On the left side of the equation, we have:
2 hydrogen atoms (2 H₂O)
2 oxygen atoms (2 H₂O)
On the right side of the equation, we have:
2 hydrogen atoms (2 H₂)
2 oxygen atoms (1 O₂)
We can see that the number of hydrogen atoms is already balanced, but the number of oxygen atoms is not. To balance the equation, we need to add a coefficient in front of O2 so that we have the same number of oxygen atoms on both sides.
The balanced equation is:
\(2 H_2O -- > 2 H_2 + 1 O_2\)
A compound is broken down into simpler compounds during a decomposition reaction. Different techniques, such as heating, exposure to light, or the inclusion of a catalyst, can be used to produce this reaction.
The reactant component splits into two or more products, which may be elements or compounds, during decomposition. A synthesis reaction, in which less complex substances join to create a more complex compound, is the antithesis of this reaction.
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how many grams are there in 3400 moles of tetranitrogen dicarbide?
Answers
Explanation:
molar mass of tetranitrogen dicarbide S4N4= 4×32+4×14
128+56
184 g/mol
no.of moles =given mass/ molar mass
3400= given mass / 184
3400×184 =given mass.
625600 g
THE OH BOND IN WATER IS POLAR BECAUSE
Answers
Answer: In the case of water, we know that the O-H covalent bond is polar, due to the different electronegativities of hydrogen and oxygen. Since there are two O-H bonds in water, their bond dipoles will interact and may result in a molecular dipole which can be measured.
Explanation:
Which form of energy increases in an object as you raise it higher off the ground?
A. Electrical
B. Kinetic
C. Mechanical
D. Potential
Answers
Answer:
D. Potential
Explanation:
Answer:
Potential
Explanation:
Gravitational potential is the energy the object has of it's position of the earth's surface. When the object is lifted, work is done. When work is done in raising the height of an object, energy is transferred as a gain in the gravitational potential energy of the object.
Complete the Molecular formula, complete ionic equation and net ionic equation for the following:
Answers
The molecular formula for sodium nitrate is NaNO₃, and the molecular formula for potassium acetate is KCH₃COO.
Complete ionic equation:
Na⁺(aq) + NO₃⁻(aq) + K⁺(aq) + CH₃COO⁻(aq) → Na⁺(aq) + CH₃COO⁻(aq) + K⁺(aq) + NO₃⁻(aq)
Net ionic equation:
NO₃⁻(aq) + CH₃COO⁻(aq) → no reaction
The net ionic equation shows that there is no reaction between sodium nitrate and potassium acetate. When these compounds are mixed, they will dissociate into their respective ions in solution, but these ions do not react with each other to form any new compounds or products. Therefore, the net ionic equation is simply the two ions that remain in solution after dissociation.
When sodium nitrate (NaNO₃) and potassium acetate (KCH₃COO) are mixed in water, they dissociate into their respective ions due to the polar nature of water molecules.
The net ionic equation shows only the species that are involved in the actual reaction, which in this case is no reaction. We can see that the NO₃⁻ and CH₃COO⁻ ions are both present on both sides of the equation, meaning that they do not react with each other. Therefore, there is no change in the identity of the species present in solution, and no new compounds are formed.
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FILL IN THE BLANK. The lewis structure of pf3 shows that the central phosphorus atom has ________ nonbonding and ________ bonding electron pair(s)
Answers
The lewis structure of \(PF_3\) shows that the central phosphorus atom has 1 nonbonding and 3 bonding electron pair(s)
Let us consider the Lewis Structure of \(PF_3\)
Here, the central atom is phosphorus P.
We know, The atomic number of Phosphorus is 15.
The so the distribution will be like 2, 8, 5
Here, in the last orbit total of 5 electrons are present, so for completing the octet it needs 3 more electrons.
Hence, The phosphorus atom has 1 non-bonding and 3 bonding electron pairs with fluorine atoms.
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Of all the Earth science careers you researched online, which three sound the most interesting to you and why?
Answers
Though this question is a matter of opinion, I can provide a possible answer to help guide you in your writing, by choosing the ecology, atmospheric science and geological fields of earth science.
What makes these fields of study interesting?These fields of study or career paths are especially interesting since they often lead to new discoveries regarding the history of our planet, or insights into the possible future of the Earth. Allow me to offer some examples:
In the field of atmospheric sciences, scientist were able to predict the warming of the earth due to greenhouse gases and give insight into a possibly grim future, allowing us to take actions to prevent it.In the field of geology, scientist were able to study the rock formations and layers of sites such as the grand canyon and provide information as to how and when such marvels of nature were formed. Finally, in the field of ecology, scientist are able to study ecosystems and the species that inhabit them, and further our understanding of interspecies relationships as well as biology.Therefore, we can conclude for the reasons listed above that these 3 career paths are some of the possible choices you can use when deciding your own three most interesting fields in Earth science.
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