you determine the melting point to be 182.1c, and you begin to narrow down your choices using the appendix tables - pg 92 in the lab manual. you find your unknown to test positive for the sodium bicarbonate test. what can you conclude from this preliminary chemical test? the unknown may be 4-chloro-3-nitrobenzoic acid, but optional tests are needed the unknown is 4-chloro-3-nitrobenzoic acid the unknown is 4-methylbenzoic acid
Answers
With the use of this preliminary chemical analysis, we can determine that the unknown material is most likely 4-chloro-3-nitrobenzoic acid if it passes the sodium bicarbonate test and has a melting point of 182.1°C.
To verify the identity, additional optional tests are necessary. The presence of an acidic functional group is shown by a positive sodium bicarbonate test result, which is consistent with the carboxylic acid group in 4-chloro-3-nitrobenzoic acid. The reported melting temperature for this chemical, 182.1 °C, is likewise consistent with this melting point. However, more research is required for definite confirmation because other substances with related qualities might exist.
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--The complete Question is, What can you conclude from this preliminary chemical test if the unknown substance tests positive for the sodium bicarbonate test, and the melting point is determined to be 182.1°C?--
Related Questions
Energy
In this scenario, electrical Energy is transferred to___Energy
Answers
Answer:
light
Explanation:
I'm not sure to my answer but hope it helps if it is correct:)
Consider the following reaction: 2 SO2(g) + O2(g) → 2SO3(g)
If the initial rate of change for sulfur dioxide is -2.00 M/min, what is the initial rate of change of oxygen?
A) -4.00 M/min
B) -1.00 M/min
C) 4.00 M/min
D) 1.00 M/min
Answers
Answer:
A)-4.00 M/min
Explanation:
hope it helps
A student describes a substance as lacking a definite shape. The description also states that the particles of matter are close to each other but still able to flow past each other. Which type of substance is the student most likely describing?.
Answers
Based on the given description, the student is most likely describing a liquid.
As we know, liquids do not have any definite shape, but they do have a definite volume. This is because the particles of matter in a liquid are close together, but they are still able to flow past each other. Due to this property, liquid take the shape of its container.
Some examples of liquids include water, oil, and gasoline.
Other states of matter include solids and gases.
Solids have a definite shape and volume, and the particles of matter in a solid are not able to flow past each other.
Gases have no definite shape or volume, and the particles of matter in a gas are very far apart and are able to move freely.
Thus, the correct answer is liquids.
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how many atoms are there in 6.8 mole of boron
Answers
which of the following statements is not true?
A. covalent compounds have low melting and boiling points.
B. covalent bonds occur between nonmetals.
C. covalent compounds are often gases or liquids.
D. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules.
Answers
Answer:
I think option (D)is not true
decide how to supersets these substances? If if is not possible, please write "cannot be separated" on the space provided
Answers
Answer: (although the question does not sate whether if you separate them physically or through energy. so i did both)
1. can be separated (When high-energy ultraviolet rays strike ordinary oxygen molecules (O2), they split the molecule into two single oxygen atoms, known as atomic oxygen)
2. can be separated, but through electrolysis, fiscally moving a crane to generate electricity to separate the molecules
3. Most solid particles, composed of diamagnetic or weak paramagnetic materials, cannot be extracted by a conventional magnetic separator. physically cannot be separated. but through heat yes
4. but there is a catch: doing so requires energy. ... If energy from coal were applied to drive the decomposition reaction, more CO2 would be released than consumed, because no process is perfectly efficient. so it cant be separated physically
5. it can be separated but it needs energy physically cannot be separated.
Explanation:
jamila makes zinc sulfate
she uses an acid and zinc metal
the diagram shows the stages jamila uses to make zinc sulfate
the stages are not in the correct order
Answers
The diagram shows the stages jamila uses to make zinc sulfate and the stages in the correct order include the following below:
Add excess zinc to the acid then gently heat.Filter the reaction mixture.Dry the zinc sulfate with filter papers.Heat the filtrate to concentrate the solution.Leave the filtrate to evaporate slowly.What is Filtration?This is referred to as a process used to separate solids from liquids or gases using a filter medium.
In the formation of zinc sulfate, the zinc is usually added to concentrated H₂SO₄ and filtered with the use of filter paper through several techniques to ensure that the filtrate is dry and concentrated.
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It takes a water wave 5.2 seconds to travel between two docks there are 19 m apart. An observer notices that 20 crests pass the first dock in 17 seconds.
find the wavelength of the water waves.
Answers
Answer:
152.12
Explanation:
hope it helps
Kong Mali po sorry
Which orbital is portrayed on the right?
Answers
A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.
What's the appearance of the p orbital?A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.A maximum of two electrons will be placed in 1s first. With a maximum of two electrons, 2s will then be filled. With a maximum of 6 electrons, 2p will then be filled.Each shell can only carry a certain amount of electrons: the first shell can hold two electrons, the second shell can hold eight electrons (2 + 6) and so on, the third shell can hold 18 electrons (2 + 6 + 10).To learn more about orbital refer to:
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What happens to the average kinetic energy at a constant temperature? *
1.it increases
2.it decreases
3.it stays the same
4.it disappears
Answers
As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.
What characterizes a radioactive atom?
Answers
Answer:
It's C
Protons repel the neutrons.
Explanation:
An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. The instability of an atom's nucleus may result from an excess of either neutrons or protons.
Answer:
B. It's nucleus is unstable
Explanation:
A P E X
what are plasmas properties?
Answers
Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.
Explanation:(1) Plasma has a very high electrical conductivity .
(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field
(3)It is readily influenced by electric and magnetic fields .
(4)It produces it's on electromagnetic radiations.
Determine the number of grams in a mole of each of the following gases. (Pay attention to gases that have diatomic molecules.) (a) neon g (b) hydrogen g (c) ozone g
Answers
(a) Neon: 20.18 g/mol (b) Hydrogen: 2.02 g/mol (c) Ozone: 48.00 g/mol.
To determine the number of grams in a mole of neon, hydrogen, and ozone gases, we need to use their molar masses.
A mole is defined as the amount of a substance that contains the same number of entities as the number of atoms in exactly 12 grams of carbon-12.
The molar mass of a substance, measured in grams per mole (g/mol), is the mass of one mole of that substance.
Hence, the molar mass of a substance can be calculated by adding up the atomic masses of all the atoms present in one mole of that substance.
(a) Neon: Ne has an atomic mass of 20.18 g/mol.
Hence, one mole of neon has a mass of 20.18 g.
(b) Hydrogen: H2 is a diatomic molecule, meaning that it exists as two atoms bonded together. The atomic mass of hydrogen is 1.01 g/mol.
Therefore, the molar mass of hydrogen is (2 × 1.01) g/mol = 2.02 g/mol. Therefore, one mole of hydrogen has a mass of 2.02 g.
(c) Ozone: Ozone (O3) is a triatomic molecule, meaning that it exists as three atoms bonded together.
The atomic mass of oxygen is 16.00 g/mol.
Therefore, the molar mass of ozone is (3 × 16.00) g/mol = 48.00 g/mol.
Hence, one mole of ozone has a mass of 48.00 g.
The answers are as follows: (a) Neon: 20.18 g/mol (b) Hydrogen: 2.02 g/mol (c) Ozone: 48.00 g/mol.
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Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. Rate=12Δ[N2O]Δt=−12Δ[N2]Δt=Δ[O2]Δt Rate=Δ[N2O]Δt=12Δ[N2]Δt=−12Δ[O2]Δt Rate=−Δ[N2O]Δt=−12Δ[N2]Δt=12Δ[O2]Δt Rate=−12Δ[N2O]Δt=12Δ[N2]Δt=Δ[O2]Δt
Answers
The rate of reaction expressed in terms of reactants and products is; Rate=Δ[N2O]Δt=12Δ[N2]Δt=−12Δ[O2]Δt.
Rate of reactionThe term rate of reaction refers to the time taken for a reaction to take place. That is, how fast or slow a reaction progresses.
For the reaction, N2 + 1/2O2⟶N2O, we can see that the rate of reaction expressed in terms of reactants and products is; Rate=Δ[N2O]Δt=12Δ[N2]Δt=−12Δ[O2]Δt.
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If an ideal gas at a constant temperature is initially at a pressure of 3.8 atm and is then allowed to expand to a volume of 5.6 L and a pressure of 2.1 atm, what is the initial volume of the gas?
Answers
Answer:
The most common example is the molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 L for 1 mole of any ideal gas at a temperature equal to 273.15 K and a pressure equal to 1.00 atm.If an ideal gas at a constant temperature is initially at a pressure of 3.8 atm and is then allowed to expand to a volume of 5.6 L and a pressure of 2.1 - 18914… ... of 5.6 L and a pressure of 2.1 atm, what is the initial volume of the gas? ... An ideal gas is at a pressure of 1.4 atm and has a volume of 3 L.
Explanation:
I hope I help :)
rank the bold-faced hydrogens for the following compounds from most acidic to least acidic.
Answers
From one of the most acidic via least acidic, these compounds' bold-faced hydrogens are II > III > V > IV > I.
Why do you use the word "acidity"?
Acidity explains how much acid is present in a material. An acid is a substance that releases hydrogen ions into water and reacts with certain metals to generate salts.
According to the given question:
The strong acids are those which completely ionizes in the aqueous solution. the strong acid will losses more H⁺ ion when it dissolved in the water. The weak acids are those which are partially ionizes in the aqueous solution. the strong acid will losses few H⁺ ion when it dissolved in the water.
Therefore from most acidic via least acidic, these compounds' bold-faced hydrogens are II > III > V > IV > I.
The complete question is-
Rank the bold-faced hydrogens for the following compounds from most acidic to least acidic. (Attachment below for options)
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In the water cycle, clouds form as a result of A. Precipitation. B. Transportation. C. Evaporation. D. Condensation. Please HELPPPP. 15 PIONTS!!!!¡!
Answers
Answer: D. Condensation
Explanation: because condensation happens when water vapor cools and turns into clouds
What is the atomic mass of an element that has 6 protons, 7 neutrons, and 6 electrons?
6
7
13
19
Answers
Answer:
13
Explanation:
proton plus neutron equal to atomic mass
The state of matter with the slowest moving atoms is _
A: plasma
B: liquid
C: solid
D: gas
Answers
The state of matter with the slowest moving atoms is solid. The correct answer is option C.
State of matter refers to the physical form that matter can exist in, such as solid, liquid, gas, and plasma.
In a solid, the particles are closely packed together and have a fixed position in a crystal lattice structure. The intermolecular forces between the particles are strong, which causes them to vibrate in place.
The particles in a solid have the lowest amount of kinetic energy compared to the other states of matter, which means they move the slowest.Therefore, the slowest moving atoms are found in the solid state of matter. Option C is the correct answer.
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Help me answer these questions
Answers
Answer:
3.
a.climate
4.
c.average measurements of temperature and rainfall over many years
1. You may be using medium for shoot regeneration from leaf explants of a plant in Expt-5. The plant media may contain the plant growth regulators (hoones) BA and NAA. The molecular weight of BK is 72 A : and NAA is 186. The media is pH to 5.8. (a) Before making the plant media, you found the pH to be 3.6. What would you add quiekly to get it to a pH of 5.8 (give a specific name of the solution)? Why? (1 pt) (b) How much BA will be weighed fot a 1M solution? (Y po) (c) Convert your answer from (b) to mg/ml. (Y/ pt) (d) Convert your answer from (c) to mg 1 . (1 pt) (e) How much BA will be weighed for a 5mM solution? (1/4pt) (f) Convert your answer from (c) to mg/ml. ( /4pt ) (g) Convert your answer from (f) to mg/L. (H/ pt) (h) Your stock solution of BA is 5mM and your working solution is 0.2mg/.. What volume of the stoc be added to 250ml of medium? [Hint: fook at the previous answers Keep to 4 decimal pts.) (3 pts Convert your answer from (h) to μI, and which pipettor will you use to aliquot the B. A? (1 pt)
Answers
(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.
(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .
Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)
To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.
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Which best explains why the trend in noble gas boiling points increases down the group?.
Answers
The atoms become larger, the intermolecular forces between the atoms become stronger and more energy is needed to overcome these forces. Hence, the boiling point of noble gases increases down the group.
What are noble gases?
Group 18 of the modern periodic table consists of noble gases. Helium, neon, argon, krypton, xenon, and radon are noble gases. These gases are monoatomic and chemically inert under normal conditions and because of this they are also called inert gases. These gases are present in very small quantities in the atmosphere, and so they are also called rare gases.Trends in Physical Properties of Noble Gases:
Atomic Radii (Atomic size): As we move down the group from helium to radon the atomic size of Noble Gasses keeps on increasing. This is because when going down the group, the number of occupied shells with valence electrons increases.Boiling and Melting Points: As we move down the group, the boiling and melting point of the Noble Gasses increases due to the following reason:When moving down in the group, the atomic radius increases which results in the formation of a strong Van Der Waals force of attraction between the atoms.As to overcome the interatomic force of attraction which becomes stronger, it also requires more energy during melting and boiling.Density: All elements of group 18 have low densities. When going down the group, density increases as the atomic mass keeps on increasing.Ionization Energy: In the periodic table, As we move down the group the first ionization energy keeps on decreasing.Ionization Potential: When going down the group, the atomic radii increases which increases the attractive force and ultimately results in the increase of polarity and decrease in the ionization potential. This is because the larger atom of the group in the valence electrons are held together less tightly by the atom as they are situated far away from the nucleus.To learn more about trends in noble gases:
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Copy of C.1 Compl. S middle east map q.
O d. It reacts with carbonates.
Clear my choice
of
us page
Iron (III) chloride (FeCl3) completely dissociates when dissolved in water. In a 0.60 mol/L solution of Iron (III) chloride, what
will be concentration of Cl ions?
Select one:
Oa. 1.0 mol/L
1.8 mol/L
OC. 0.20 mol/L
O d. 0.60 mol/L
Answers
The concentration of the chloride ion is obtained as 0.20 mol/L.
What is the solution concentration?We have to note that the concentration of the solution has to with the amount of the solute that we have in the system. In this case, we can see that we have the Iron (III) chloride (FeCl3) which completely dissociates when dissolved in water.
Now we are told that the concentration of the solute is 0.60 mol/L solution of Iron (III) chloride but each FeCl3 molecule produces three Cl- ions, the concentration of Cl- ions in the solution will be three times the concentration of FeCl3.
Hence;
Concentration of the chloride ion is;
0.60 mol/L/3
= 0.20 mol/L
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The molar mass is the mass of which of the following? (check all that apply)the mass of a substance per molethe average atomic mass unitsthe g/mol of a substance6.0221 x 10^23 particles of a substance
Answers
The molar mass is the mass of which of the following?
The mass of a substance per mole and the g/mol of a substance is correct.
The molar mass of a substance is the mass per mole of its entities (molecules, atoms, ions, etc)
6.0221x10^23 particles of a substance is also correct. The mole contains 6.022 x 1023 entities. The number of entities in a mole is called Avogadro's number.
Answer:
The mass of a substance per mole
The g/mol of a substance
6.0221 x 10^23 particles of a substance
The value of ΔG° for the phosphorylation of glucose in glycolysis is 13.8 kJ/mol.What is the value of the equilibrium constant for the reaction at 25.0°C?
Answers
Explanation
Given:
ΔG° = 13.8 kJ/mol = (13.8 x 1000) J/mol = 13800 J/mol
Temperature, T = 25.0°C. = 25.0°C + 273 = 298.0 K
What to find:
the value of the equilibrium constant, K for the reaction at 25.0°C.
Step-by-step solution:
Both K and ΔG° can be used to predict the ratio of products to reactants at equilibrium for a given reaction.
ΔG° is related to K by the equation ΔG°= −RTlnK.
R is the molar gas constant, ( R = 8.3144598 J/K/mol)
If ΔG° < 0, then K > 1, and products are favored over reactants at equilibrium.
The next step is to substitute the values of ΔG° and T into the equation to get K.
ΔG°= −RTlnK
13800 J/mol = -(8.3144598 J/K/mol x 298 K x lnK)
13800 J/mol = -(2477.70902 J/mol x lnK)
Divide both sides by 2477.70902 J/mol
\(\begin{gathered} \frac{13800\text{ J/mol}}{2477.70902\text{ J/mol}}=-\frac{2477.70902\text{ J/mol }\times\ln K}{2477.70902\text{ J/mol}} \\ 5.5697=-\ln K \\ \ln K=-5.5697 \\ K=\ln ^{-1}(-5.5697) \\ \end{gathered}\)
which of the following methods is used to obtain
colored light from a filament lamp?
A. additive
B. subtractive
C. multiplicative
D. divisible I
Answers
The method used to obtain colored light from a filament lamp is additive. A filament lamp is a device that emits white light when it's turned on. However, the light can be made to appear colored by using a technique called additive color mixing. In this method, colored filters are used to filter the white light emitted by the filament lamp. The colored filters absorb some of the light wavelengths and allow others to pass through. When different colored filters are used, the colors of the light that passes through them combine to produce a new color. This method is called additive because the colors of light are added together to produce a new color.
The correct option is A. additive.
the pKa of Evan's oxazolidinone (benzyl) is ?
Answers
The pKa of Evan's oxazolidinone (benzyl) is approximately 8.5, which reflects its moderate acidity and importance in asymmetric synthesis reactions.
1. pKa is a measure of the acidity of a compound, specifically how easily a proton (H+) can be donated to a solution. A lower pKa value indicates a stronger acid.
2. Evan's oxazolidinone is a type of chiral auxiliary used in asymmetric synthesis. It consists of a benzyl group, which is a phenyl (aromatic ring) attached to a CH2 group, and an oxazolidinone ring.
3. The pKa value for Evan's oxazolidinone (benzyl) is around 8.5, which means it has a moderate acidity. This acidity is essential for the compound's role in asymmetric synthesis, as it helps control the stereochemistry and reactivity of the reaction.
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graph mass versus volume for the data given in the table. What is the slope of the line
Answers
The slope of the graph mass versus volume for the data is the density of the material.
What is the slope of the line?The slope of a line in mathematics is given as;
m = y2 - y1/x2 - x1.
In this case we have a graph in which the y axis is the mass of the substance and the x axis is the volume of the substance. We know that ratio of the mass to the volume of the substance is the density and that this value is a constant.
As such, the slope of the graph mass versus volume for the data is the density of the material.
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1.Compare Endothermic reactions to exothermic reactions (Define each and list 2 characteristics for each. Fill in the table below.-ENDOTHERMIC -EXOTHERMIC•Positive H Value •Negative H •ValueAbsorbs heat •Releases Heat•Products have higher energy •Products have a lower energy
Answers
When the enthalpy is positive (H > 0), the reaction is endothermic, that is, it absorbs energy.
When the enthalpy is negative (H< 0), the reaction is exothermic, that is, it releases energy.
Therefore, the correct matches are
Endothermic:
• Positive H Value.
,• Absorbs Heat.
,• Products have higher energy.
Exothermic:
• Negative H Value.
,• Releases Heat.
,• Products have lower energy.
A 72. 4 mL solution of Cu(OH) is neutralized by 47. 8 mL of a 0. 56 M H2(C204) solution. What is the concentration of the Cu(OH)?
Answers
The concentration of Cu(OH) is 0.185 M.
To find the concentration of Cu(OH), we need to use the balanced chemical equation for the neutralization reaction:
Cu(OH)₂ + 2 H₂(C₂₀₄) → Cu(C₂₀₄) )₂ + 4H2O
From the equation, we can see that 2 moles of H₂(C₂₀₄) react with 1 mole of Cu(OH)₂.
Therefore, we can use the following equation to calculate the moles of Cu(OH)₂:
moles of Cu(OH)₂ = moles of H₂(C₂₀₄) / 2
To find the moles of H₂(C₂₀₄) , we can use the concentration and volume of the H₂(C₂₀₄) solution:
moles of H₂(C₂₀₄) = concentration of H₂(C₂₀₄) x volume of H₂(C₂₀₄) (in liters)
We need to convert the volume of the H₂(C₂₀₄) solution from milliliters to liters:
volume of H₂(C₂₀₄) = 47.8 mL = 0.0478 L
Substituting the given values, we get:
moles of H₂(C₂₀₄) = 0.56 M x 0.0478 L = 0.026768 moles
Now we can calculate the moles of Cu(OH)₂:
moles of Cu(OH)₂ = 0.026768 moles / 2 = 0.013384 moles
To find the concentration of Cu(OH), we need to divide the moles of Cu(OH)₂ by the volume of the Cu(OH) solution in liters:
concentration of Cu(OH) = moles of Cu(OH)₂ / volume of Cu(OH) (in liters)
We need to convert the volume of the Cu(OH) solution from milliliters to liters:
volume of Cu(OH) = 72.4 mL = 0.0724 L
Substituting the calculated values, we get:
concentration of Cu(OH) = 0.013384 moles / 0.0724 L = 0.185 M
Therefore, the concentration of Cu(OH) is 0.185 M.
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