Answer:
What is the pH of a KOH solution that has [H+] = 1.87 × 10–13 M? Round to the nearest tenth.
12.7
What is the pOH of a KOH solution that has [OH–] = 5.81 ×10–3M? Round to the nearest hundredth.
2.24
What is the pH of a solution of NaCl that has [H+] = 1.00 × 10–7 M? Round to the nearest hundredth.
7.00
Explanation:
13. In cell a17, use the sumif function and structured references to display the total membership in 2023 for groups with at least 40 members
The way to use the SUMIF function for the given question is; "=SUMIF(G2:G11, ">=40")".
How to write functions in Excel?In Microsoft Excel, formulas are usually used to generate results or values to a cell.
Now, there are different ways that a formula can be written but then the formula must start with an equal to sign. The formula to be used for the cells given has the function "SUMIF" and this is used to provide a sum of numeric values based on a condition.
Thus, the way to use the SUMIF function for the given Cell is to type the formula "=SUMIF(G2:G11, ">=40")".
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At 15°c, the value of kw is 4. 5 × 10⁻¹⁵. What is the equilibrium concentration of oh⁻ at this temperature?
The equilibrium concentration of OH⁻ at this temperature is 6.708 × 10⁻⁸ M
Ionic product of waterThe ionic product of water Kw = [H⁺][OH⁻] where
[H⁺] = hydrogen ion concentration and [OH⁻] = hydroxide ion concentration.At equilibrium, [H⁺] = [OH⁻]
So, [H⁺][OH⁻] = Kw
[OH⁻][OH⁻] = Kw
{OH⁻}² = Kw
Taking square root of both sides, we have
√{OH⁻}² = √Kw
Equilibrium concentration of OH⁻{OH⁻} = √Kw
Since Kw at 15 °C is 4. 5 × 10⁻¹⁵, substituting the value of the variable into the equation, we have
{OH⁻} = √Kw
{OH⁻} = √(4. 5 × 10⁻¹⁵)
{OH⁻} = √(45 × 10⁻¹⁶)
{OH⁻} = √45 × √10⁻¹⁶
{OH⁻} = 6.708 × 10⁻⁸ M
So, the equilibrium concentration of OH⁻ at this temperature is 6.708 × 10⁻⁸ M
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A diploid organism has a certain gene that has 15 known alleles (variants). Given this information, any given organism of that species can/must have which of the following?
Based on the gene that the diploid organism has and the alleles, it must have at most 2 alleles for that gene.
What is a gene?A gene simply means a basic unit of heredity. It should be noted that genes are present in the chromosomes of organisms.
From the the gene that the diploid organism has and the alleles, it must have at most 2 alleles for that gene. This is important for the species.
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A disk is rotating with an angular velocity function given by ω=kt+l. What is the angular acceleration of the disk at t=t ?
Answer:
angular acceleration of the disk ∝ = K
explanation:
Given that; Angular velocity function given by ω = Kt + L Angular acceleration of the disk at t=T is = ? Now, Angular velocity; ω = Kt + LAngular acceleration is;∝ = dω / dt= ( Kt + L )At t = T∝ = K Because ∝ is not dependent on t Therefore angular acceleration of the disk ∝ = K
This animal has a protostome developmental pattern and a trochophore larva. Identify the major clades that this animal belongs to? choose the correct order that represents how they are related to one another
The major class that this animal belongs to is the Lophotrochozoans.
What is the Lophotrochozoan?These are a clade of animals that are regarded as the protostome. The monophylletic animals that are grouped under this clade are:
annelidsmolluscsbryozoansThe correct that shows how they are related are:
MetazoaParazoaorgan level organismsRadiataRead more on the protostome. here:
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Nucleophilicity is a kinetic property. a higher nucleophilicity indicates that the nucleophile will easily donate its electrons to the electrophile and that the reaction will occur at the faster rate. the reaction rate also depends on the nature of the electrophile and solvent. rank the following reactions from fastest to slowest based on the nucleophilicity of the nucleophile.
The ordering of the reaction based on the based on the nucleophilicity of the nucleophile will be equation 2 > equation 1 > equation 3.
What is a reaction?It should be noted that a chemical reaction simply means the change in chemicals to another form.
In this case, the ordering of the reaction based on the based on the nucleophilicity of the nucleophile will be equation 2 > equation 1 > equation 3.
This is depicted because tertiary amide is greater than secondary amide which is also greater than primary amide.
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Which statements best describe differences in the style of the two works? the painting pays attention to details of kahlo’s physical appearance, while the poem does not. The poem portrays the painter as serious, while the painting does not. The poem reveals details that explain kahlo’s facial expressions, while the painting does not. The painting uses imagery that tells of kahlo’s connection to nature, while the poem does not
The painting pays attention to details of Kahlo's physical appearance, while the poem does not. Painting and poetry are artistic expressions.
What is painting?Painting is an artistic expression aimed at visually expressing the characteristics of a given situation.
Painting can be employed to put emphasis on the physical characteristics of a person, landscape, etc.
Conversely, poetry refers to an artistic expression aimed at expressing feelings and emotions through texts.
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Answer:
the answer is C
Explanation:
on EDGE2022
Evaluate three consequences of not applying for funding for your studies
The three consequences of not applying for funding for your studies are:
Inadequate money to pay for your education.Lack of focus in your be studies.Inability to buy necessary educational resources.Consequences of not applying for funding for your studies Inadequate money to pay for your education: If you don't apply for finding, a student might find it difficult to pay for his fees.Lack of focus in your be study: A student who is experiencing difficulty in paying fees will have a divided attention and won't focus on studies.Inability to buy necessary educational resources: The student will find it difficult to but the necessary learning resources that will aid their studies.Learn more about education:
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Read the excerpt from a history of the world in 100 objects. Horatio herbert kitchener, 1st earl kitchener, was one of the media stars of the first world war. The famous recruitment poster has him pointing straight at us in full uniform, finger in the foreground, handlebar moustache not far behind, with the words 'your country needs you'. Which technique does the author use to engage the reader? the author asks a question. The author gives an anecdote. The author uses a quotation. The author provides a description
The technique that the author uses to engage the reader is; D: The author provides a description
What technique is used by the author?From the given passage from "A History of the World in 100 Objects," the author Neil MacGregor gives us information about Horation Herbert Kitchener and his capture of the slit drum, which made him famous and whose carvings represent the dominance of Islam in Khartoum in the late 1800s.
Now, after the given information, we are told that Kitchener became even more popular for being featured on First World War recruitment posters. Thus, we can say that the way that the author engaged the reader is by providing a description.
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Answer:
D
Explanation:
Edge
Which character's comments in this excerpt are in conflict with society, and why? joe summers is in conflict with society because he is joking with the villagers. Old man warner is in conflict with society because he believes that young folks have crazy ideas. Mr. Adams is in conflict with society because he reports some villages are talking of giving up the lottery. Mrs. Dunbar is in conflict with society because she is standing with the villager who represents society’s old ways
Answer:
Old man warner is in conflict with society because he believes that young folks have crazy ideas.
Explanation:
Answer:
answer B
Explanation:
i took the test
If a penny is made of 3. 11 grams of copper, how many atoms of copper are in the penny? show your calculations and answer with unit
Answer:
Assuming a penny is made of pure copper Cu, then the molar mass of Cu can be used to determine the number of atoms in a penny.
The number of atoms in a mole is the Avogadro constant [math]N_{0}[/math]
The molar mass of Cu is [math]M_{Cu} =[/math] 63.546 grams per mole Cu
How Much Does A Penny Weigh? U.S. pennies since 1982 weigh 2.5 grams or 3.11 grams
Use the Moles to Grams Conversion Formula to solve for moles N[math]_{Cu}[/math]
Choose the mass of a penny to be [math]m_{penny}[/math] = 2.5 g for this question. (Repeat it with [math]m_{penny}[/math] = 3.11 g for yourself.)
Solution:
Find the number of moles of Cu in a penny [math]N_{Cu}[/math]
Find then number of atoms using
Explanation:
What is the oxidation number for bromine in the molecule h2br2o6
Taking into account the definition of oxidation number, the oxidation numbers for bromine in the molecule H₂Br₂O₆ is +5.
Definition of oxidation numberThe oxidation number is the charge that an atom has; is an integer that represents the number of electrons an atom puts into play when it forms a given compound.
In other words, the oxidation number of an element is a value that indicates the number of electrons that element gains or loses when it combines with another.
Oxidation number determinationTo determine the oxidation state of different elements it is necessary to know that:
The oxidation number of hydrogen in a compound is +1, except in metal hydrides, where is –1.The oxidation number of oxygen in a compound is –2, except in peroxides, where it is –1.On the other side, the sum of the oxidation numbers of the existing elements in a chemical formula must add up to zero.
Then, considering the oxidation numbers of each element, multiplying it by the number of existing elements in the chemical formula and adding it and equaling it to zero, the value of the missing oxidation number can be obtained.
Oxidation number for bromineIn this case, the oxidation numbers of bromine is calculated as:
H₂Br₂O₆: 2× (+1) + 2× (oxidation numbers of nitrogen) + 6×(-2)= 0
2 + 2× (oxidation numbers of nitrogen) - 12= 0
2× (oxidation numbers of nitrogen) - 10= 0
2× (oxidation numbers of nitrogen) =10
oxidation numbers of nitrogen= 10÷2
oxidation numbers of nitrogen= +5
Finally, the oxidation numbers for bromine in the molecule H₂Br₂O₆ is +5.
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To assess the effectiveness of a kindergarten-readiness program, 15 children from a random sample were each given a diagnostic assessment before beginning the program and a follow-up assessment after completing the program. For each child, the difference in the score points between the two assessments was calculated and used to create the 95 percent confidence interval (20. 1,23. 9). Assuming all conditions for inference are met, which of the following is a correct interpretation of the interval?
Answer:
the answer is D
Explanation:
I found it on quizlet
Which of the following are possible benefits of alley cropping in the rain forest? select the two correct answers
The possible benefits of alley cropping in the rain forest include:
Increase in diversityMaintenance of soil nutrient.What is Alley Cropping?Alley cropping can be defined as a cropping technique that involves the planting of shrubs or trees in organized rows to maintain soil nutrients and increases biodiversity, especially in a rain forest.
Alley cropping also helps to control soil erosion.
Therefore, the possible benefits of alley cropping in the rain forest include:
Increase in diversityMaintenance of soil nutrient.Learn more about alley cropping on:
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Write the complete chemical symbol for the ion with 82 protons and 80 electrons
Which word best describes a scientific hypothesis?
Choose the best spanish equivalent to the phrase. My mother hugs me every night. Mi madre me abraza cada noche. Mi madre abraza me cada noche. Mi madre abraza cada noche. Mi madre mí abraza cada noche
Answer:
Mi madre me abraza cada noche.
on edge its A :)
Explanation:
I'm sorry i'm late... but other peope can see this to help them :))
Answer: A. Mi madre me abraza cada noche.
Explanation: On Edge!
Jayne has been tested to have an iq of 70. This suggests that she has a ____ level of intellectual disability
Answer:
She has a low level of intellectual disability.
In the passage, all of the following contrasts convey cynthia’s complex understanding of the divide between workers and management except
In the passage, hungry versus satisfied didn't contrast convey Cynthia’s complex understanding of the divide between workers and management.
What is Sweat?Sweat is a play that was written and produced in 2015 by American playwright Lynn Nottage. Also, it was centered on the working class (workers) of Reading in Pennsylvania and it won the Pulitzer Prize for Drama in 2017.
Cynthia was one of the characters that featured in Sweat among other characters such as Evan, Oscar, Brucie, Jason, Chris, Jessie, Tracey, and Stan.
Based on the passage, we can deduce that hungry versus satisfied didn't in anyway contrast convey Cynthia’s complex understanding of the divide between workers and management.
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Scott’s employer pays 70% of his health insurance premium and deducts the remainder from his paycheck. Scott is paid biweekly, and the annual premium is $8748. How much is deducted from his paycheck for health insurance?
The amount deducted from his paycheck for health insurance bi weekly is; $100.94
What is the amount deducted?
Since 70% of his health insurance premium is paid by his employer and the remaining deducted, then;
Scott's amount deducted per week for health insurance = 8,748 x 30% = $2,624.40
There are 52 weeks in a year and as such, amount deducted weekly is;
2,624.40/52 weeks = $50.47
Amount deducted bi weekly = 50.47 × 2 = $100.94
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A mining company received government permission to purchase land for surface mining activities. this land was previously used by local ranchers for feeding their livestock. which of these plans prevents the permanent dislocation of local ranchers due to mining in this location?
Answer:
Feeding the Livestock
Explanation:
Feeding the Livestock prevents them from being able to use the location because now it's damaged.
Why is it difficult to study early human societies
Answer:
Before the advent of writing, historians had fewer and less detailed resources to work with
Explanation:
Writing is a system of graphic representation of a language, by means of signs drawn or engraved on a medium. In this sense, writing is a specifically human graphic way of conserving and transmitting information.
The hieroglyphic writings are the oldest of the scriptures proper (for example, the cuneiform writing was first hieroglyphic until certain hieroglyphs were attributed a phonetic value) and are observed as a transition between pictograms and ideograms. Hieroglyphic writing was abandoned in the Hellenizing period of Egypt. At present, Chinese and Japanese writing preserve some logograms combined with signs whose interpretation is purely phonetic. Most of the writings of the world are purely graphemic, so the roman scriptures (based on the Latin alphabet), Arabic (based on the Arabic alphabet), Cyrillic (based on the Greek alphabet), Hebrew (based on the Hebrew alphabet) , Hellenic (based on the Greek alphabet), Indian (generally based on the Devanāgarī) and to a much lesser extent the Armenian, Ethiopian alphabetic (abugidas based on ghez or ge'ez), Korean, Georgian, Burmese, Coptic, etc. . The Glagolitic alphabets and the runic alphabet that preceded the Gothic script as well as the Pahlavi and Zend used in today disappeared languages.
Red squirrels usually eat hazelnuts, but due to a reduction in their food source, they had to share resources with gray squirrels. The number of red squirrels decreased over time, and gray squirrels gradually replaced the red squirrels because they are better adapted to the environment. This is an example of
According to the context, gray squirrels gradually replaced the red squirrels due to a process of adaptation of these to the environment in which they are immersed, this is an example of natural selection.
What is natural selection?It is the process of adaptation to the environment by which only organisms with certain characteristics reproduce.
Thus, natural selection is the process that favors the organisms best adapted to deal with their environment, allowing them to reproduce and transmit their characteristics to future generations.
Therefore, we can conclude that according to the context, gray squirrels gradually replaced the red squirrels due to a process of adaptation of these to the environment in which they are immersed, this is an example of natural selection.
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Given △def, which is not equal to cos(f)? sin(f). Sin(d). Tan(f). Cos(d)
Answer:I believe it is tan(F) answer C
Explanation: sorry fam you just gotta trust ig
also if anyone wants to give a more mathematical answer here is the triangle they are using
How many carbon atoms do glucose fructose and galactose have
Answer:
each contain 6 carbon atoms
Explanation:
What positive number when divided by its reciprocal
has a result of 4/25?
Explanation:
[tex]x \times x = \frac{4}{25} [/tex]
[tex] {x}^{2} = \frac{4}{25} [/tex]
[tex]x = \frac{2}{5} [/tex]
Hardy inc. Has two operating departments (1 and 2) and is considering renting a new machine to help automate the printing process. The normal rental for the machine is $25/hour, but for rentals that exceed 1,000 hours the rental rate drops to $22/hour. Operating dept 1 needs the machine for 300 hours. Operating dept 2 needs the machine for 900 hours. If hardy uses the stand alone method, how much of the cost will be allocated to department 1?
The amount of the cost will be allocated to department is $6,900
What are operating costs?Operating costs are known to be the current or the present expenses that are often incurred from the daily running of a business. They includes selling, administrative expenses, etc.
Note that in the above, the Total rental cost allocation to department 1 are:
= (100 x $25) + (200 x $22)
So you then sum up the both amount together:
= $2,500 + $4,400 = $6,900
Therefore, the cost that needs to be allocated to Department 1 is $6,900
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What affects the distribution of metals and minerals on earth
Answer:
This is due to the unequal resource distribution across the land and the distribution of resources depends upon the physical factors like the land and the climatic conditions. Some places are filled with more resources while some are filled with scare resources. The countries which have more resources are wealthy while the countries which do not have that much resources are not wealthy. The metals are also unevenly distributed on the earth’s crust and the most abundant metal is aluminum and silicon. Some of the distracted metals which are found deep in the earth’s crust and then extracted in the ore form from the mines. The most important reason for the uneven distribution of metals in Earth's crust are their physical factors like the climate, land and their topography.
Explanation:
Earth is made up of many minerals and metals. They are distributed unevenly because of the varying topography and climate across the lithosphere.
What is unequal distribution?Earth is made of varying minerals and metals that are found in the mantle layer and vary in quantity as the distribution, pressure, and other physical factors are different in regions.
The topographical structure, climate, and land vary the mineral and metal distribution. Some areas have suitable climates, and pressure that supports more minerals making them rich than others.
Therefore, the topography and climate vary the mineral distribution.
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#SPJ2
What technique did the artist of the painting above use to capture the light reflecting on the water?
Answer:
I believe the answer is rapid brushstrokes.
A pension fund manager is considering three mutual funds. the first is a stock fund, the second is a long-term government and corporate bond fund, and the third is a t-bill money market fund that yields a sure rate of 5.5%. the probability distributions of the risky funds are:
The probability computed about the pension fund manager indicates that the standard deviation of the portfolio is 21.93%
How to calculate probability?From the complete information, the covariance between fund returns will be:
= 34% × 25% × 0.11
= 0.9350%
The weight of the bond fund is given as 0.407281. Therefore, the weight of the stock fund in portfolio will be:
= 1 - 0.407281
= 0.592719
Therefore, the standard deviation will be:
= 23.56% × 0.9309471
= 21.93%
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