the acid-base indicator bromcresol green is a weak acid. the yellow acid and blue base forms of the indicator are present in equal concentrations in a solution when the ph is 4.68.
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The pH of the solution is 4.68. The acid-base indicator bromcresol green is a weak acid. The yellow acid and blue base forms of the indicator are present in equal concentrations in a solution.
The pH of the solution is 4.68, which is acidic. The acid-base indicator bromcresol green is a weak acid. The yellow acid and blue base forms of the indicator are present in equal concentrations in a solution. The color of the bromcresol green indicator is yellow in acidic conditions and blue in basic conditions.The indicator bromcresol green is a weak acid and can lose one hydrogen ion (H+) to form an anion.
In acidic conditions, the H+ concentration is high, and the acid form of the indicator predominates, resulting in a yellow color. The H+ concentration is low in basic conditions, and the basic form of the indicator predominates, resulting in a blue color. The acid form and basic form of the bromcresol green indicator are present in equal concentrations in a solution of pH 4.68.The pH of the solution is 4.68, which is acidic.
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Related Questions
PART A QUESTION 1 (a) (b) (c) (d) Use an appropriate diagram to elucidate the generation of characteristic X-ray in an atom. Explain how the X-rays are produced in an X-ray tube. C2 SP1 C2 SP3 Are X rays reflected by bone tissues? Provide your comments on the image difference between soft and hard tissue obtained in an X-ray film. C5 SP4 State ONE (1) type of physical injury where an X-ray device is used for diagnostic purpose. C2 SP3
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(a) Diagram of characteristic X-ray generation in an atom:
[Note: Due to the limitations of text-based communication, I'm unable to provide a visual diagram. However, I'll explain the process in the following text.]
(b) Explanation of characteristic X-ray generation:
When high-energy electrons collide with an atom, they can knock out inner shell electrons, creating vacancies. Outer shell electrons then transition to fill these vacancies, releasing energy in the form of X-rays. These X-rays are called characteristic X-rays and have specific energies corresponding to the energy differences between different electron shells.
(c) X-ray production in an X-ray tube:
An X-ray tube consists of a cathode and an anode enclosed in a vacuum. The cathode emits a stream of high-speed electrons through a process called thermionic emission. These electrons are accelerated by a high voltage and directed towards the anode. As the fast-moving electrons collide with the anode, X-rays are produced through two main processes: bremsstrahlung radiation (braking radiation) and characteristic X-ray emission.
In bremsstrahlung radiation, the electrons are decelerated by the positively charged anode, causing them to emit X-rays with a continuous spectrum of energies. Characteristic X-ray emission occurs when the high-speed electrons displace inner shell electrons in the anode, leading to the generation of characteristic X-rays specific to the anode material.
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The number of calories needed to raise the temperature of 10 grams of water from 20°C to 30°C is
A.10
B.20
C.100
D.40
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Which option describes energy being released as heat?
A.Lions sleeping after a big meal
B.A baby bird eating a worm
C.A child shivering in the cold
D.A surfer on a surfboard
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Answer: C. A child shivering in the cold
Explanation:
Did the test. :)
What did Antoine Lavoisier’s experiments demonstrate?
A. Atoms always split into pairs during a chemical change.
B. Mass is neither lost nor gained during a chemical change.
C. Matter can be created during a chemical change.
D. Energy is neither lost nor gained during a chemical change.
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26. Which type of element has properties that are intermediate between metals and nonmetals?
O Metalloids
O Alkali metals
O Halogens
Alkaline earth metals
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Explanation:
.metallic has properties that are intermediate between mental and non metal
Answer:
Metalloids
Explanation:
I took the quiz
Conduction and Convection involve the movement of particles. Radiation does not
True or False
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Answer:
False
Explanation:
Because it is false heat will always transfer so it require matter
Answer:
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What are true about water changing states?
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Answer:
The last one is true.
what is the change in entropy when sodium chloride dissolves in water
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Answer:
The entropy increases when sodium chloride is dissolved in water. The ions that were held together in crystalline solid are now moving in all possible directions. Thus entropy increases.
Sodium chloride(NaCl) in water is an endothermic reaction, which means the heat is absorbed. So it will be greater than 0.
help plz and can you plz use terms
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How does science affect our lives on the example of the pandemic?
Answers
Science affected our lives at the beginning of this pandemic.
Explanation:
Although scientists did study the virus to see how deadly it is the pandemic kept spreading. The spreading of the virus was not the scientist's fault it was the citizens' fault. They now found a vaccine that took hard work and a short amount of time.
describe and explain the possible effect on your results of the follow-ing experimental errors or variations. (a) you forgot to add the phos-phoric acid. (b) you collected all of the distillate in one container rather than in two. (c) the 2-methylcyclohexanol you used was the pure trans isomer rather than a mixture of isomers
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(a) There may be a decrease in the yield of the intended product, 1-methylcyclohexene. (b)Collecting all the distillate in one container can inhibit the separation of desirable components with different boiling points. (c) If the intended product is generated preferentially from a certain isomer or if the various isomers result in undesirable side effects or products.
(a) Forgetting to include the phosphoric acid: Phosphoric acid is frequently utilized as a catalyst in the dehydration of alcohols, such as the transformation of 2-methylcyclohexanol into 1-methylcyclohexene. The reaction might not happen or happen much more slowly if the phosphoric acid is not introduced. As a result, there may be a decrease in the yield of the intended product, 1-methylcyclohexene. This mistake would probably result in a decline in the reaction's overall efficiency and a lower yield of the targeted product.
(b) Collecting the entire distillate in a single vessel as opposed to two:
The fractions may mix if the distillate, which contains the desired product, is gathered in a single container as opposed to two separate containers. The product's quality may be harmed by contamination or dilution as a result of this mixing, making it more difficult to separate and assess. Since the collected volume would vary from the predicted values, the inaccuracy might also affect how the product's yield is quantified. Additionally, collecting all the distillate in one container can inhibit the separation of desirable components with different boiling points if the distillation process involves separation based on distinct boiling points.
(c) Using the pure trans isomer of 2-methylcyclohexanol rather than a combination of isomers can affect the outcome of a process when a mixture of isomers is intended to be used in it. The relative quantities of the isomers in the mixture may have an impact on the rate of the reaction and the distribution of the end product. If only one isomer is used, the reaction might not go as planned, leading to a different product yield or altered product distribution. This mistake has the potential to have a considerable negative effect on the experimental results, particularly if the intended product is generated preferentially from a certain isomer or if the various isomers result in undesirable side effects or products.
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METHANOL + ETHANOIC ACID
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if you’re looking for a balanced equation it would be:
Methanol +ethanoic acid ==> methyl ethanoate + water ( in the presence of concentrated sulfuric acid )
CH3OH + CH3COOH==> CH3COOCH3 + H2O
~~~~~~
But, if you were looking for what it would be called it would be:
ethanoic acid with methanol will produce methyl ethanoate.
~~~~~~
And the reaction between Methanol and Ethanoic acid is known as esterification.
~~~~~~
I wasn’t sure of your question so I answered the best way that I could. I hope this helped!
50.00 ml of 0.10 formic acid, is titrated with a 0.10 m koh solution. after 25.00 ml of the koh solution is added, the ph in the titration flask will be: a) 3.35 b) 8.22 c) 7.00 d) 2.37 e) 3.74
Answers
Answer:
Explanation:
Formic acid (HCOOH) is a weak acid and KOH is a strong base. The titration reaction is:
HCOOH + KOH → HCOO^- + H2O
Before adding any KOH, the solution is just formic acid, so the pH is determined by the dissociation of formic acid:
HCOOH + H2O ⇌ HCOO^- + H3O^+
The equilibrium constant expression is:
Ka = [HCOO^-][H3O^+] / [HCOOH]
Since formic acid is a weak acid, we can assume that [HCOO^-] is negligible compared to [HCOOH]. Therefore, the equation simplifies to:
Ka = [H3O^+]^2 / [HCOOH]
Taking the negative logarithm of both sides:
-pKa = log([H3O^+]^2 / [HCOOH])
2pKa - pH = log([HCOOH] / [H3O^+])
At the start of the titration, there is 0.10 mol/L formic acid in the solution. Therefore, the initial concentration of formic acid is:
[formic acid] = 0.10 mol/L
The initial pH can be calculated using the Henderson-Hasselbalch equation:
pH = pKa + log([formic acid] / [formate ion])
At the equivalence point, all of the formic acid has reacted with the KOH to form sodium formate (HCOONa). The pH of the solution will be determined by the hydrolysis of the sodium formate:
HCOO^- + H2O ⇌ HCOOH + OH^-
The equilibrium constant expression is:
Kb = [HCOOH][OH^-] / [HCOO^-]
Since sodium formate is the salt of a weak acid and a strong base, we can assume that the concentration of OH^- is equal to the concentration of NaOH that has been added. Therefore:
Kb = [HCOOH][NaOH] / [HCOONa]
Taking the negative logarithm of both sides:
-pKb = log([HCOOH][NaOH] / [HCOONa])
At the equivalence point, the moles of NaOH added are equal to the moles of formic acid in the solution:
moles of NaOH = 0.10 mol/L × 0.05000 L = 0.00500 mol
At this point, all of the formic acid has been neutralized and converted to sodium formate, so the final concentration of formate ion is:
[formate ion] = 0.00500 mol / 0.07500 L = 0.0667 mol/L
The concentration of formic acid is zero at the equivalence point, so the final pH is determined by the hydrolysis of the sodium formate:
Kb = [HCOOH][NaOH] / [HCOONa]
-pKb = log([HCOOH][NaOH] / [HCOONa])
-pKb = log([HCOOH][NaOH] / [0.0667])
Since pKb for formate ion is 10.37, we can substitute this value and solve for the pH:
10.37 = log([HCOOH][NaOH] / [0.0667])
[HCOOH][NaOH] / [0.0667] = 10^-10.37
[HCOOH][NaOH] = 6.66 × 10^-11
Substituting the concentration of NaOH at the equivalence point:
[H
Neurons mostly receive signals that are _____; others, however, are _____. inhibitory; excitatory polarizing; depolarizing excitatory; refractory excitatory; inhibitory
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Neurons mostly receive signals that are excitatory ; others, however, are inhibitory.
A neuron will generate action potentials more often when it receives more excitatory than inhibitory inputs.A neuron receives both excitatory and inhibitory inputs from the many other neurons it is connected to at synaptic junctions.
For an action potential to be generated in a neuron, the sum of the excitatory inputs must be greater than that of the inhibitory inputs.
Neurotransmitters are the chemical messengers in the body, which are released by the axon terminal of neuron ( also called nerve cell) and transmit nerve impulse to the neighboring cell ( which could be a muscle cell or a nerve cell) .
There are primarily two types of neurotransmitters that are-
1) Excitatory neurotransmitter and 2) Inhibitory neurotransmitter.
Inhibitory neurotransmitter have inhibitory effects on the neuron that is they reduce the chances that a neuron will fire an action potential. In other words, they are responsible for slowing signals between neurons.
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Convert a density of 55.3 lbs/ft3 into g/mL.
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The density of 55.3 lbs/ft³ is 0.884 g/mL.
To convert density from pounds per cubic foot (lbs/ft³) to grams per milliliter (g/mL), we can use the following conversion factors:
1 pound = 453.59237 grams
1 foot = 30.48 centimeters (cm)
1 inch = 2.54 centimeters (cm)
1 milliliter (mL) = 1 cubic centimeter (cm³)
First, we convert pounds to grams:
55.3 lbs = 55.3 lbs * 453.59237 g/lb = 25050.364 grams
Next, we convert cubic feet to milliliters:
1 ft³ = (30.48 cm)³ = 28316.8466 cm³
1 cm³ = 1 mL
Finally, we calculate the density in g/mL:
Density = (25050.364 g) / (28316.8466 mL) ≈ 0.884 g/mL
Therefore, the density of 55.3 lbs/ft³ is approximately 0.884 g/mL.
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12. Calculate the molar mass of a compound given that 0.035g of the gaseous compound
occupied 30cm³ at r.t.p.
a) 26.1g/mol
b) 28g/mol
c) 27.6g/mol
d) 56g/mol
Pls an answer I have an exam!!!
If you find I’ll mark you brainliest
Answers
if a molecule of h2 had one of its electrons promoted to the antibonding orbital, what would happen to the bond?
Answers
Answer:
It would become weaker.
Explanation:
If an electron was promoted to the antibonding orbital, the bond order would become zero and the molecule would split apart.
the athabasca oil sand reserves of canada have an estimated 1.7 trillion barrels of bitumen, which is over of the total known reserves in the world.
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The statement "the Athabasca oil sand reserves of Canada have an estimated 1.7 trillion barrels of bitumen, which is over of the total known reserves in the world." is False.
While the Athabasca oil sands are indeed significant and represent a substantial portion of the global reserves, they do not make up over half of the total known reserves.
The exact proportion of the Athabasca oil sands in relation to the global reserves can vary depending on different estimates and classifications. However, it is important to note that there are significant oil reserves in other parts of the world as well, such as Venezuela, Saudi Arabia, and Russia, which contribute to the overall global oil reserves.
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Complete question :
The Athabasca oil sand reserves of Canada have an estimated 1.7 trillion barrels of bitumen, which is over of the total known reserves in the world. T/F
disadvantage of globalization:
plz leave some ideas
Answers
Answer:
causes job displacement
Europium-152 undergoes beta decay to form what daughter isotope and decay particle??
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The daughter nucleus that is formed in the process is 152/64Gd .
What is beta decay?Gadolinium-152 and a beta particle are produced during the beta decay of europium-152. An electron that is released from the nucleus during the decay process is the beta particle.
A beta ray is released from an atomic nucleus during a radioactive decay process known as beta decay. The proton in the nucleus changes from a proton to a neutron during beta decay, and vice versa.
The beta particle is represented by the symbol "β" with a superscript indicating its charge (-1 for an electron)
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(6) briefly describe laminar composites. what is the prime reason for fabricating these materials?
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Laminar composites are materials composed of layers or laminates of different materials that are bonded together. The layers can be made of fibers, fabrics, or sheets of materials such as metals or polymers. The layers are typically arranged in a stack or sandwich configuration, with each layer having different properties such as strength, stiffness, or toughness.
The primary reason for fabricating laminar composites is to create a material with tailored properties that are not found in a single material. By combining layers of different materials, the resulting composite can have improved strength, stiffness, fracture toughness, or other desirable properties.
Laminar composites are used in a wide range of applications, including aerospace, automotive, marine, and sporting goods, where high-performance materials are required
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0.630 moles of sodium chloride are how many grams (with calculation)
Answers
Answer:
Heyaa!! Im Pinky and Im here to inform you that your answer is...
Explanation:
!!! 36.8189451 Grams !!!
Have an amazing day!!!
~Pinky~!!
Step by step explanation: 1 mole =114.818 grams, so you would multiply 114.81 by 0.630
How many joules of energy are made by the loss of 100kg of mass using the formula E=mc2? please help!!!
Answers
Answer:
E = 3 × 10¹⁰ J
Explanation:
Mass, m = 100 kg
We need to find energy made by the loss of 100 kg of mass. The formula between the mass and energy is given by :
E = mc²
Where c is speed of light
Putting all the values, we get :
E = 100 kg × (3×10⁸ m/s)²
= 3 × 10¹⁰ J
So, the required energy is 3 × 10¹⁰ J.
An aqueous 0. 839 M acidic acid solution is prepared with a total volume of 0. 500 L. The molecular weight of acidic acid is 60. 05G/mole what mass of acetic acid in grams is needed for the solution
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We need 25.196 grams of acetic acid to prepare the solution.
To calculate the mass of acetic acid needed for the solution, we can use the following equation:
mass = moles x molecular weight
where moles = Molarity x Volume (in liters).
In this case, we know that the molarity of acetic acid (also known as ethanoic acid) is 0.839 M and the total volume of the solution is 0.500 L. Therefore, the number of moles of acetic acid needed is:
moles = 0.839 M x 0.500 L = 0.4195 moles
Next, we can use the molecular weight of acetic acid (60.05 g/mol) to calculate the mass of acetic acid needed:
mass = 0.4195 moles x 60.05 g/mol
= 25.196 g
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Predict the polarity of 6 real molecules (O2, HF, H2O, NH3, CF4, CH3F). First, draw the
molecules and any bond dipoles. Then draw any molecular dipoles. Explain your
reasoning before you check your predictions with the simulation.
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The polarity of 6 real molecules are given below,
O2- Neutral
HF- Acidic
H2O- Neutral
NH3- Basic
CF4-Nonpolar
CH3F- Polar
How to determine polarity of molecules?Predicting the polarity of molecules can be done using a variety of methods. One method is to use the molecular dipole moment, which is a measure of the separation of positive and negative charge in a molecule. Molecular dipole moments can be calculated using quantum chemistry methods such as Density Functional Theory, or other methods. Another method is to consider the electronegativity of the atoms in the molecule and the type of bond between them. Non-polar molecules have atoms with similar electronegativities and strong covalent bonds, while polar molecules have atoms with different electronegativities and polar covalent or ionic bonds. Finally, the polarity of a molecule can also be predicted by looking at its shape and symmetry. Non-polar molecules often have symmetrical shapes, while polar molecules tend to be asymmetrical.To learn more about polarity of molecules refer :
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A student argued that there is less gravity on the Moon than on Earth. The student explained, "You need an atmosphere to have gravity. The Moon doesn't have an atmosphere and therefore doesn't have a lot of gravity. Earth has a thick atmosphere and therefore has much more gravity." What do you think about the student's claim?
A. The student is correct because the atmosphere is what creates the gravitational pull on Earth
B. The student is correct because the mass of the object determines how thick the atmosphere will be
c. The student is incorrect because gravity is determined by the mass of the object and not the atmosphere
D. The student is incorrect because the thickness of the atmosphere will determine the amount of gravity on the object
Answers
Answer:
C
Explanation:
The student is incorrect.
The atmosphere weighs very little compared to the material the earth is made of. Gravity is effected by mass. The more mass, the more gravity. The only correct (and it is totally correct) answer is C
describe the law of conservation of momentum
Answers
Charlotte's car averages 25 miles per gallon of gas. How many dal would she need to travel 3,241 hm?
Answers
Answer:
Around 129 galons
Explanation:
if you divied 3,241 by 4 you get 129 gallons but if you times that by 25 you get 3,225 so a little bit off but close.
Write a question you could ask the scientists who made Graph A (above) to learn more about how their evidence relates to global temperatures?
(Your question should show that you understand how changes in the amount of energy from the sun reaching Earth might affect global temperatures. Hint: use some information from the graph to make up your question.)
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Answer:
The hypthesis of the stated thesis, states that the changes in solar irradiance effect surface tempeture of the glove. Why does the suns tempture effects the globes tempture?
Explanation:
The hypthesis of the stated thesis, states that the changes in solar irradiance effect surface tempeture of the glove. Why does the suns tempture effects the globes tempture?
to prepare a 200.0 ml solution of 5.0 m nacl, how many grams of nacl would be added to the volumetric flask?
Answers
To prepare a 200.0 ml aqueous solution of 5.0M NaCl, grams of nacl is 10g.
(w/v) % = 5
Volume = 200 mL
Hence, mass of NaCl=200×5/100 = 10g
What is an aqueous solution?
An aqueous solution is an answer in which the solvent is water. it's far commonly shown in chemical equations with the aid of appending (aq) to the relevant chemical system. for instance, an answer of desk salt, or sodium chloride (NaCl), in water could be represented as Na+(aq) + Cl−(aq). The word aqueous (which comes from aqua) way concerning, associated with, just like, or dissolved in, water. As water is an first-rate solvent and is also evidently ample, it's miles a ubiquitous solvent in chemistry. Because water is frequently used as the solvent in experiments, the word answer refers to an aqueous solution, unless the solvent is detailed.To know more about aqueous solutions, click the link given below:
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