V [AB] [AB] Classify each situation by whether the simplifying assumption can be used or whether the quadratic formula is required Simplifying assumption can be used Quadratic formula required [AB] = 0.0301 M Kc = 6.86 x 10-" [AB] 0.441 M Kc = 8.12 x 10 - [AB] 0.00461 M Kc 2.79 x 10 [AB] 0.410 M Kc 3.68 x 10 [AB] = 0.0319 M Kc 0.000120
Answers
As given, Simplifying assumption can be used when the concentration of [AB] is very small, i.e., [AB] << [A] and [B]. And when the concentration of [AB] is not very small, i.e., [AB] ≈ [A] or [AB] ≈ [B], then we can't use the simplifying assumption and quadratic formula is required.
So, using the above-mentioned criteria, we classify each situation by whether the simplifying assumption can be used or whether the quadratic formula is required:[AB] = 0.0301 M Kc = 6.86 x 10- Simplifying assumption can be used[AB] 0.441 M Kc = 8.12 x 10 - Simplifying assumption can be used[AB] 0.00461 M Kc 2.79 x 10 - Quadratic formula required[AB] 0.410 M Kc 3.68 x 10 - Quadratic formula required[AB] = 0.0319 M Kc 0.000120 - Quadratic formula required So, only for the first two cases, the simplifying assumption can be used while for the rest of the cases, the quadratic formula is required.
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Related Questions
Criminalist Julie Sandel is investigating a series of threatening notes written in pencil and sent to a local politician. A suspect is arrested and Julie directs the suspect to prepare writing samples to compare to the writing on the notes. She has the suspect sit at a desk in an empty office and gives him a pen and a piece of paper. She begins to read one of the notes and asks the suspect to write the words she dictates. After reading about half a page, she stops, then dictates the same part of the note a second time for the suspect. At one point, the suspect indicates that he does not know how to spell one of the words, so Julie spells it for him. After completing the task, Julie takes the origi- nal notes and the dictated writing from the suspect to a document examiner. What mistakes, if any, did Julie make?
Answers
Answer:
See explanation
Explanation:
Julie Sandel, the Criminalist made several mistakes in handling this investigation. They include;
It is true that handwriting can be deduced by comparing a suspects's handwriting to the questioned document, however Julie made a mistake by not making the suspect to write many pages. The suspect may intentionally decide to change his/her hand writing. This trick can be neutralized by asking the suspect to write several pages.
Secondly, the suspect ought to have been given a pencil and paper similar to the one used to write the threatening document. Rather, Julie gave the suspect a pen.
Thirdly, the suspect only wrote half a page instead of a full page. Secondly, Julie took only two exemplars when she should have taken more.
She should not have dictated the spelling of any word to the suspect. The examiner is not supposed to do that.
The threatening documents should have first been shown to the document examiner before taking the exemplars.
Please answer
Question 1 (3 points)
If a glass of water containing 40g at 20 degrees C is heated to 50 degress C, what is the amount of energy gained?
Answers
The amount of energy gained : 5016 J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
mass water = 40 g
c water = 4.18 J/g C
∆T = temperature difference = 50 - 20 = 30 C
Heat gained :
\(\tt Q=40\times 4.18\times 30\\\\Q=5016~J\)
how can offspring have traits that neither parent has?
Answers
When both parents shared different traits either it will be heterogeneous or homogenous traits,in that case offspring traits neither belongs to parents.However,chances are very that traits of children neither belongs to parents.
Unaffected parents can create impacted offsprings assuming that the two guardians are transporters (heterozygous) for the attribute being followed in the family. Latent traits are normally not communicated in each age. Finally, guys and females are similarly prone to communicate a latently acquired characteristic.
In the event that the latent characteristic is more than prevailing, the recessive traits will really become predominant and the predominant attribute will become recessive.Recessive alleles are meant by a lowercase letter (a versus A). Just people with an aa genotype will communicate a latent characteristic; consequently, posterity should get one passive allele from each parent to display a latent traits.
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What are the 5 signs of dehydration?.
Answers
5 Signs of dehydration are chills, dry mouth, muscle cramps, dark urine, and lightheadedness.
When the body loses more fluid than it takes in, it becomes dehydrated and is unable to function normally. This can result in a number of problems if it isn't treated, like losing strength and stamina, brain damage, or even death.
In addition to thirst, these are the top five symptoms of dehydration:
Dry or sticky mouthLightheadednessMuscle crampschills and other flu-like symptoms like fatigue, headache, or nausea.Urine that is dark and has a strong odor or less urination.Know more about dehydration here: https://brainly.com/question/12261974
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6. Which properties might a nuclide on the band of
nuclear stability have?
a. atomic number 10 and 15 neutrons
b. atomic number 30 and 30 neutrons
c. atomic number 52 and 78 neutrons
d. atomic number 86 and 128 neutrons
Answers
Nuclide on the band of nuclear stability have atomic number 86 and 128 neutrons.
What is nuclear?
Utilizing nuclear reactions to generate electricity is known as nuclear power. Nuclear fission, nuclear decay, and nuclear fusion reactions can all provide nuclear energy. Currently, nuclear power plants use the fission of uranium and plutonium to generate the great majority of the world's electricity from nuclear sources. In specialised applications like radioisotope thermoelectric generators found in some space probes like Voyager 2, nuclear decay processes are employed. International research continues to centre on producing electricity via fusion technology. The majority of nuclear power facilities use thermal reactors with once-through fuel cycles and enriched uranium. When the proportion of neutron-absorbing atoms rises to a point where a chain reaction can no longer be sustained, which normally takes three years, fuel is removed.
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I have little or no rainfall for long periods of time. I cause death to all living things because of lack of water. What am I?
Answers
Answer:
a drought !
- little to no water causes it
- it causes for organisms to die and organisms need water !
Which Body system works alone to maintain homeostasis? (pls help)
Answers
Answer:
circulatory system
Explanation:
Your circulatory system delivers oxygen-rich blood to your bones. Meanwhile, your bones are busy making new blood cells. Working together, these systems maintain internal stability and balance, otherwise known as homeostasis.
Which of the following could be added to a solution of potassium fluoride to prepare a buffer?
A) ammonia
B) potassium acetate
C) hydrochloric acid
D) sodium fluoride
E) sodium hydroxide
Answers
the two protons on the middle carbon of propane are interchangeable by rotational symmetry and are therefore said to be:
Answers
The correct answer is the two protons on the middle carbon of propane are interchangeable by rotational symmetry and are therefore said to be homotopic.
The statement that describes the two protons on the middle carbon of propane that are interchangeable by rotational symmetry is they are said to be homotopic.
The homotopic is the term used to describe the two atoms that can be interchanged with each other by a symmetry operation that involves only rotations. Here, the term "homotopic" is used to describe the two protons in the propane molecule that can be interchanged by rotational symmetry.
Propane molecule: Propane is a straight-chained hydrocarbon composed of three carbons bonded to eight hydrogens. It is the third member of the alkane family, and its molecular formula is C₃H₈.
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What is ionic bond and explain it
Answers
Answer:
An ionic bond is a chemical bonding involving the attraction between oppositely charged ions
Explanation:
On the periodic table, elements from group 1 and 7 are attracted to each other and when they bond, it's called ionic bonding. This is because of their valence electrons and ions.
Answer:
Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds. It is one of the main types of bonding along with covalent bonding.
Balance the chemical equation. Based on the equation, how many grams of bromine are produced by the complete reaction of 11 grams of potassium bromide?
Answers
Answer:
Explanation:
The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:
11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)
initial consentretion
Answers
What is initial concentration?
High initial concentration of spilled oil has a negative effect on the biotransformation process that causes a significant lag phase of about 2–4 weeks. Even after biostimulation, at least a week is needed for microorganisms to adapt and the entire bioremediation process may require months and even years to be completed (Atlas, 1995; Zahed et al., 2010a). The rates of uptake and mineralization of many organic compounds by a microbial population depend on the concentration of the compound (Olivera et al., 1997; Rahman et al., 2002).
Step by step explanation
What type of reaction is illustrated?
2S03 —> 2S02 + O2
Answers
Answer:
synthesis reaction
Explanation:
synthesis reaction where reactants unite to form a single product.
A person has a 342.41 mL sample of gas at a pressure of 21.31kPa If the person increases the volume to 1.42L what will the new pressure of the gas be in kPa?
Answers
Answer:
\(\text{5.14 kPa}\)
Explanations:
Here,we want to get the new pressure of the gas
To get this, we have to use the gas law that relates volume and pressure
This is the Boyle's law and it can be represented as follows:
\(P_1V_1=P_2V_2\)Where 1 represents the initial values and 2 represents the final values
We have to convert the volumes to the same scale
We have to convert the liters to ml by multiplying by 1000
We have this as 1.42 * 1000 = 1420 mL
The values are:
Initial
Pressure = 21.31 kPa
Volume = 342.41 mL
Final
Pressure =?
Volume = 1420 mL
We substitute the values as follows:
\(\begin{gathered} 21.31\text{ }\times\text{ 342.41 = P }\times\text{ 1420} \\ P\text{ = }\frac{21.31\times342.41}{1420}\text{ = 5.14 kPa} \end{gathered}\)calculate the oxidation number of the central atom of FeSO4 7H2O
Answers
Answer:
\({ \tt{let \: the \: oxidation \: state \: be \: x}} \\ { \bf{x + sulphate \: ion+ water = overall \: charge}} \\ \\ \\ { \tt{x + ( - 2) + 0 = 0}} \\ \\ { \tt{x = + 2}} \\ { \tt{oxidation \: state = + 2}}\)
3. Matter with a composition that is always the same is a(n)
substance
mixture
compound
Answers
Answer:
substance
Explanation:
A pure substance is a form of matter that has a constant composition (meaning it's the same everywhere) and properties that are constant throughout the sample (meaning there is only one set of properties such as melting point, color, boiling point, etc
what is the bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals?
Answers
The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5
Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2
Bond order = (8 - 5) / 2
Bond order = 1.5.
This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5
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Why were scientists unsure about the last common ancestor between apes and humans?
Answers
Answer:
Scientists were unsure about the last common ancestor between apes and humans because fossils are so scarce, researchers do not know what the last common ancestors of living apes and humans looked like or where they originated.
Explanation:
Why do these sisters have different traits? Use the above words in your response, describing what would determine these traits at the molecular scale.
Answers
Long Answer:Inheritances of different traits by siblings can be attributed to the recombination of genetic material between the parents that produces unique combinations in offspring. In addition, genetic mutations, epigenetic modifications, and environmental factors can also play a role in generating differences between siblings at the molecular level.
To comprehend how different traits are expressed in siblings, we must first understand the basic concepts of genetics. Each cell in the human body contains chromosomes, which are made up of DNA molecules that encode genetic information in the form of genes. The specific arrangement of these genes determines the physical and functional characteristics of an organism's cells, tissues, and organs.To explain why siblings have different traits, we need to look at how genetic material is transmitted from parents to offspring. Each parent contributes one copy of each chromosome to their offspring during fertilization, resulting in a unique combination of genes in each offspring.
This phenomenon is known as genetic recombination and is the primary cause of genetic diversity in populations. The likelihood of a specific trait appearing in offspring is determined by the presence or absence of particular genes and how they interact with each other.To determine these traits at the molecular scale, scientists have used a variety of techniques, including DNA sequencing and gene expression profiling. These methods allow researchers to identify the specific genes and molecular pathways that underlie particular characteristics. By analyzing the molecular basis of these traits, researchers can gain insight into the underlying mechanisms that generate differences between siblings, providing a better understanding of how genetic diversity is maintained in populations.
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Which of the following compounds has more atoms of sulfur (S)? Explain your reasoning.
Sodium Sulfate (4Na2SO4)
Nitrogen Sulfate (N2(SO4)3)
Answers
Answer:
Nitrogen sulfate
Explanation:
In Sodium sulfate there is 1 sulfur ion since the poly atomic ion SO4 has only one sulfur. In nitrogen sulfate there are 3 sulfur ions since it is (SO4)3 so there are three SO4 poly atomic ions meaning there are 3 sulfur ions.
a chemical reaction where heat is absorbed is called
Answers
A chemical reaction where heat is absorbed is called an endothermic reaction.
What is an endothermic reaction?
An endothermic reaction is a type of chemical reaction in which heat is absorbed from the surroundings, resulting in a decrease in temperature. This means that the energy required for the reaction to occur is supplied by the environment, and the products of the reaction have a higher energy than the reactants. Examples of endothermic reactions include the dissolving of ammonium nitrate in water and the reaction between baking soda and vinegar.
The formula for the enthalpy change, or heat of reaction (ΔH), for an endothermic reaction is: ΔH = heat absorbed by the reaction (positive value)
The enthalpy change is typically represented in units of energy per mole of reactant, such as joules per mole (J/mol) or calories per mole (cal/mol). The sign of ΔH is positive for endothermic reactions, since heat is absorbed by the reaction.
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True or False: An equation is balanced by changing subscripts as needed
True
False
Answers
Answer: False
Explanation:
How many kilograms are in one teragram?
Answers
Answer:
0.0001 Tg 100000 kg
0.001 Tg 1000000 kg
0.01 Tg 10000000 kg
0.02 Tg 20000000 kg
Explanation:
Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by:____.
Answers
Answer:
hydrogen bonds
Explanation:
this is because the type of bonding occurs between electropositive forces.
Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by Hydrogen bonds.
Hydrogen Bond
Between a hydrogen (H) atom that is covalently bonded to a more electronegative "donor" atom or group and another electronegative atom bearing a lone pair of electrons—the hydrogen bond acceptor—a hydrogen bond (or H-bond) forms (Ac). The second-row elements fluorine, oxygen, and nitrogen are the most common donor and acceptor atoms (F).
It may take place either intramolecularly or intermolecularly (between different molecules) (occurring among parts of the same molecule). The energy of a hydrogen bond can range from 1 to 40 kcal/mol and is influenced by the shape, surroundings, and nature of the particular donor and acceptor atoms.
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what differentiates two isotopes of a given element?
Answers
Two isotopes of any particular element differs on the count of number of neutrons present on its nucleus.
Isotopes are particular atomic species (or nuclides, as specialized term) of a similar component. They have a similar nuclear number (number of protons in their cores) and position in the occasional table (and subsequently have a place with a similar synthetic component), however contrast in nucleon numbers (mass numbers) because of various quantities of neutrons in their cores. While all isotopes of a given component have practically similar substance properties, they have different nuclear masses and actual properties.
The term isotope is framed from the Greek roots isos and topos , signifying "a similar spot"; consequently, the importance behind the name is that various isotopes of a solitary component possess a similar situation on the periodic table. It was begat by Scottish specialist and essayist Margaret Todd in 1913 in an idea to the English scientist Frederick Soddy.
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If the pH of a solution is 6.2, what would the pOH be?
O A. 7.8
B. 8.9
C. 12.4
D. 5.8
SUBMIT
Answers
Answer:
7.8
Explanation:
pH + pOH = 14
pOH = 14 - 6.2
= 7.8
Describe how to make a buffer solution using a strong base and one other reagent. 15 POINTSSSSSSSS
Answers
Answer:
Hi! hopefully this helps you
Explanation:
You can make a buffer solution for a specific pH (potential of hydrogen) by mixing together a weak acid like acetic acid HC2H3O2 with a salt that contains the conjugate base like sodium acetate NaC2H3O2. A neutralization reaction would occur as you are mixing a weak acid and a strong base.
When you add the base to an acidic solution, the solution becomes less acidic and moves toward the middle of the pH scale. Aka neutralization
Hope this helps! best of luck <3
Which group on the periodic table is an atom with 5 valence electrons?Group 4 AGroup 2 AGroup 5 AGroup 15 A
Answers
Explanation:
The atoms on the periodic table are grouped according to having similar properties. Therefore, atoms of group 15 has 5 valence electrons.
Answer:
The last option is correct.
Pls help anyone ASAP!!!
Answers
Answer:
uhhhh
Explanation:
if you need help ask someone who is not anyone on this app
hehe :]
Answer:
9: Chemical Energy 10:
Electrical Energy = k
Elastic Energy = p
Sound Energy = k
Radiant Energy = k
Chemical Energy = p
Gravitational Energy = k
Explanation
There
An atom of gold has a mass of 3.271 X 10-22 g. How many atoms of gold are in 5.00 g of gold? (Give your answer in scientific notation.) How many atoms will there be in 5.00 g of gold.
Answers
Answer:
1.53 × 10²² atoms Ag
Explanation:
Step 1: Define conversions
3.271 × 10⁻²² g = 1 atom
Step 2: Use Dimensional Analysis
\(5.00 \hspace{3} g \hspace{3} Ag(\frac{1 \hspace{3} atom \hspace{3} Ag}{3.271(10)^{-22} \hspace{3} g \hspace{3} Ag} )\) = 1.52858 × 10²² atoms Ag
Step 3: Simplify
We have 3 sig figs.
1.52858 × 10²² atoms Ag ≈ 1.53 × 10²² atoms Ag