Suppose a lab group reports a percent yield of sand of 105%. is it really possible to collect more sand than was originally present? what is a possible explanation for the “extra” product? do not consider calculation mistakes; think about the procedure used.

Answers

Answer 1
Final answer:

A reported percent yield of 105% for sand in a Chemistry lab can not be due to more sand than what was originally available; it likely indicates impurities or moisture content. The law of conservation of mass dictates that actual product mass cannot exceed the theoretical mass.

Explanation:

In Chemistry, the percent yield of a reaction compares the actual yield to the theoretical yield, expressed in percentage. It is theoretically expected to range from 0% to 100%. However, a percent yield greater than 100% suggests that the product is impure or contains solvent like water, which increases its mass. The law of conservation of mass ensures you cannot get more pure product than what is theoretically possible. If a lab group reports a percent yield of 105% for sand, it cannot mean that there was more sand than initially present; instead, it may indicate that the sand is wet or contains other impurities.

An example of this could be the collection of a reaction product that has absorbed water from the air, which would make the mass of the product larger than the actual amount of desired compound formed. Another possible impurity could be remnants of reaction side products or unreacted starting materials that have not been separated from the desired product. In industrial and laboratory settings, achieving yields as close to 100% is ideal, due to efficiencies and waste disposal concerns.


Related Questions

To construct the consumer price index, the bureau of labor statistics must:

Answers

find out what people buy and then proceed to survey how the prices of those items change 

How are students chosen for work-study programs? first-come, first-served those in the most financial need by qualifying with specific skills by matching jobs to specific courses of study

Answers

Answer:

qualifying with specific skills

Explanation:

Federal work-study programs provide part time work to the undergraduate and graduate student which are financially weak. It allows the to earn money so that they can pay education expenses.

This program encourages work closely related to the students course of study and community service. It is also available for the professional students.

It is a available in Part time and full time. The job offered under Federal work study programs are both on and off campus. The off campus work is mostly related to nonprofit private organisations. If you are working on campus then you are working for your school.

To qualify for Federal Work-study award, a student should fill the application and must meet the eligibility requirements.  It is offered on first come first serve basis.

Individuals who are working part-time but would prefer to be working full-time are defined as

Answers

Hey there,
The answer to your question is underemployed workers 

Hope this helps :))

~Top

An economy in which a central authority draws up a plan that establishes what will be produced and​ when, sets production​ goals, and makes rules for distribution is a
a. ​laissez-faire economy.
b. command economy.
c. ​public-goods economy.
d. ​free-market economy.

Answers

A laissez-faire economy is one where there is no interference within the government, so that's not correct.

There's no such thing as a public-goods economy (according to google at least), but public goods are things that the government provides for the most part. It's accessible by everyone.

A free-market economy is where the government has little to no control, similar to a ​laissez-faire economy, so that's not right.

Your question is literally the definition of a command economy, so that's right!

The insured dies and the benefits of the policy are paid to the beneficiary over a stipulated period of time. this is called the ___________ settlement option.

Answers

This is called the death benefit

True or false: shopping ads can appear at the same time as text ads, allowing shoppers to find the best match before clicking through to make a purchase.

Answers

The answer in the statement above is true. It is because the shopping ads that they provide has the ability of having to provide the text ads in the same time in which is beneficial towards its shoppers because not only they will know about the product but they find the best match for the product that they would like to purchase.

The ​state and performance of a raid-z volume can be viewed using what two commands?

Answers

The two commands are;
"zpool status and zpool isotat -v commands."
If there is a single disk failure, to protect that failure a Raid-z volume needs a minimum of three hard disks.
And if there is a multi disk failure, to protect that multi disk failure a Raid-z volume needs a minimum of seven hard disks.

Excluding military personnel, there are about ____ employees in the federal bureaucracy.

Answers

The answer is 2.7 million

According to the yerkes-dodson law, when is the most efficient time for carl to mow the lawn?

Answers

According to the Yerkes-Dodson Law, as arousal increases, then performance also increases. So most likely, the best time to mow the lawn would be in the morning after breakfast because this is the time where one would have the most energy and would want to get work done. 

The right time for carl mowing the lawn is at 7-11 in the morning.

Further explanation

Yerkes-Dodson's Law the relationship between performance and motivation

Yerkes-Dodson's Law determines that performance increases with physiological or mental stimulation, but only to a certain extent. When the excitation level becomes too high, performance decreases. According to this law, the best way to increase motivation and performance is to work with objective tasks that allow us to be vigilant.

The way the Yerkes-Dodson law works

An example of how the Yerkes-Dodson Act works is the anxiety that you experience before the exam. Optimal stress levels can help you focus on the exam and remember the information. However, too many anxiety tests can affect your ability to concentrate, which makes it more difficult to remember.

Factors that influence the relationship between stress and performance.

Four factors have a very important role in the relationship between activation levels and productivity:

1. The complexity of the task

If the task that we have to carry out is difficult, we need to invest more cognitive resources (for example relative attention or operating memory) than otherwise. As a result, complex tasks require lower levels of pressure so that optimal performance is achieved from simple ones because they stimulate themselves.

2. Skill level

As is the case with task difficulties, taking into account the subject's skill level is transcendental when determining what the ideal environmental stresses are. We can say that practice in the domain reduces the difficulty of the tasks included in this one, so linking these two variables can be useful when applying the Yerkes-Dodson law.

3. Personality

It is reductionist to think that modifying the level of stimulation or environmental stress without more can enable us to influence the performance of others reliably: if we do, we will ignore something as important as the personality of each individual.

4. Anxiety

The personality factor that we know as "the nature of anxiety" refers to the tendency to experience negative emotions associated with anxiety, such as anxiety, fear, and worry. Characteristics are the core of the construct of Neuroticism; in this sense, he opposes the factor of emotional stability.

About Yerkes-Dodson's law, there is an effective time to do the work, as asked in the matter when is Carl's effective time to mow the grass? The answer is 7-11 this morning because this time is the right time to improve mood and at this time the brain produces the hormone cortisol which functions to focus the mind and provide a good mood for the body.

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Yerkes-Dodson Law https://brainly.com/question/5889566, https://brainly.com/question/9321495

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Class: High School

Subject: Bussines

Keyword: Yerkes-Dodson Law, Effective time for work.

A predominant, and often conservative, view of the world economic system today holds that the free market is the ideal mechanism for ensuring that economic growth is optimal. this same view eschews the role of government. this view is referred to as

Answers

Laissez-Faire Economics?

It's an economic system where the free market exists without government intervention.

After a dinner at Rosario’s Italian Eatery, Stephanie believes that she was overcharged and shoves Thom, the waiter. Thom sues Stephanie, alleging that the shove was a battery. Stephanie is liable

Answers

Final answer:

Stephanie could be held liable for battery against Thom.

Explanation:

In this case, Stephanie could be held liable for battery against Thom. Battery is defined as the intentional and harmful or offensive touching of another person without their consent. It can include both physical contact and actions that result in physical contact.

By shoving Thom, Stephanie made intentional physical contact with him in a harmful or offensive way. As a result, she could be held responsible for battery. It's important to note that battery does not require direct physical harm; it can encompass any unwanted or offensive physical contact.

Overall, based on the situation described, Stephanie's actions of shoving Thom could be considered battery, making her legally liable for her actions.

Joy is taking out a car loan which she’ll pay back with interest. Which option will require her to pay the lowest amount in interest?

Answers

Lowest amount of interest would be annual compounding.

What is meant by allocative​ efficiency? allocative efficiency is when every good or service?

Answers

Allocative efficiency is the state of the economy in which production suits consumer needs and preferences. Every good or service produced holds value. Even the last unit is able to serve the customer and satisfy them, but the product must also maintain an equal balance between cost effectiveness and user satisfaction.

Melissa jones just launched a firm in the wireless communications industry. shortly after the company was launched, melissa announced that a prominent silicon valley venture capitalist had agreed to serve on her board of directors. melissa knows that such a high quality appointment will send an important message to her potential business partners and clientele. this phenomenon is referred to as ________.

Answers

Answer:

The correct answer is "signaling".

Explanation:

Such a high-quality appointment is intended to send an important message to potential business partners and customers. This phenomenon is known as signaling, which refers to the activities or investments that business managers make in order to inform that they possess attributes or to convince others about a particular specific information or important fact.

Have a nice day!

Walt disney held the patent for technicolor for ___ years.

Answers

Walt Disney held the patent for Technicolor for 2 years.

Hope this helps! :D

~PutarPotato

Answer:

2

Explanation:

Sears offers a craftsman radial saw for $499.99, under the presumption that consumers see the craftsman radial saw as priced at "something over $400" rather than "about $500." this is an application of what pricing strategy?

Answers

This is an application of psychology pricing. Consumers tend to perceive odd prices as lower than they are. This causes people to round down instead of up to the next monetary unit.

The nissan automobile assembly plant in tennessee is an example of foreign direct investment in the united states.
a. True
b. False

Answers

The answer is False

When writing a persuasive message that may encounter resistance, usean indirect approach. in the opening of your message, use theattention strategy?

Answers

If your question is the TRUE/FALSE type, both claims are true. Indirect approach (that is, not tackling the point directly, but carefully choosing a way to start with something appealing and slowly arriving at the point) is most often used with persuasive messages. For example, if I want to persuade you to do something (e.g. buy my product), I know for sure that nobody likes to be sold to. So, I need to find my way around this obstacle - to pitch you an idea that sounds appealing and not salesy. And of course, in the opening of my message, I will use the attention strategy or a "hook" - that is, find an angle that sounds compelling, interesting, and that strikes right at the core of what you want.

Identify criteria you can use when choosing an investment. Which of the criteria is most important to you? Why?

Answers

Answer:

In Step 1, you identified what you want your students to know and be able to do. In Step 2, you selected a task (or tasks) students would perform or produce to demonstrate that they have met the standard from Step 1. For Step 3, you want to ask "What does good performance on this task look like?" or "How will I know they have done a good job on this task?" In answering those questions you will be identifying the criteria for good performance on that task. You will use those criteria to evaluate how well students completed the task and, thus, how well they have met the standard or standards.

Explanation:

Several studies have found that approximately 80% of cases of lung cancer are due to cigarette smoking. this measure is an example of:

Answers

an attributable risk

Explain the biggest limitation resource based view has in explaining successful companies

Answers

Resource based view measures companies success based on the resources owned by the company, which are tangible in nature. where as both tangible and intangible resources plays a critical role in a company's success. For efficient utilization of the resources, strategic resources plays a critical role which drives companies success. Neglecting intangible resources is a biggest limitation of resource based view.

If peanuts serve as a medium of exchange, a unit of account, and a store of value, then peanuts are

Answers

If peanuts serve as a medium of exchange, a unit of account, and a store of value, then peanuts are MONEY.

Sodium restriction is difficult to implement on a long-term basis because

Answers

because many patients find the diet unpalatable .

Oxley throws a rock intending to hit pieter but misses and hits ricardo who sustains an injury. ricardo can most likely recover the cost of his injury from oxley in a suit based on the tort theory of​

Answers

Ricardo can most likely recover the cost of his injury from oxley in a suit based on the tort theory of outrage. This theory is also called the Intentional infliction of emotional distress (IIED). It is a common law tort which allows individuals to recover for severe emotional distress caused by another individual that intentionally or recklessly inflicted emotional distress by behaving in an extreme and outrageous way.

In the scenario in which Oxley throws a rock intending to hit Pieter but misses and hits Ricardo who sustains an injury, Ricardo can most likely recover the cost of his injury from Oxley in a suit based on the tort theory of​ conversion.

the conversion is a civil wrong (tort) in which one converts another's property to his/her own use and exposes you to liability for damages in a civil lawsuit.



What is an advantage of having an organization's data resources organized into a database?

Answers

Updating a database is easier than updating individual files

It is simpler to update a database than to update individual files is an advantage of having an organization's data resources organized into a database.

What is organization's data resources?

Data Resources outline what details should be fetched for each element on a page. Using data resources, data fetching is isolated from hard-coded component configuration. When data is dynamically fetched, components can be reused between pages and experiences as long as the user and the experience have access to the data.

Organizational data describes the fundamental characteristics, internal workings, and behavior of corporate actors under varied social and economic conditions.

Every technological system utilizes seven major types of resources: people, information, materials, tools and machines, energy, capital, time, and others. There are a limited number of resources left on the planet, therefore we must use them wisely.

Thus, It is simpler to update a database than to update individual files.

For more information about organization's data resources,  click here:

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Yvon asks zach, "do you want to buy one of my fishing rods?" under common law this is

Answers

Under common law, Yvon offering one of her fishing rods for sale is defined as an 'Invitation to Treat'. Yvon has made her offer to sell the rod, and is inciting a discussion with Zach as to the terms of sale. This only becomes a contract once a price is negotiated and agreed upon.

Monique has a balance of $5440 on a credit card with an apr of 17.7%. paying off her balance in which of these lengths of time will result in her paying the least amount of interest?

Answers

$1,136.61 a month for 5 months 
1136.61 * 5 - 5440 = $243.05 in interest 

A sort of credit facility offered by banks is a credit card, which enables users to borrow money up to a pre-approved credit limit. Hence the amount of interest is $ $243.05.

What is Credit Card ?

Your credit scores likely increase as a result of lowering your credit use ratio. Your credit utilization ratio—the proportion of your credit card balances to credit limits—will decrease if you pay more than the minimum. (Your credit score as a whole is based in part on your credit utilization percentage.)

The card issuer will notify you of your balance, the minimum payment required, and the due date for that payment at the conclusion of each monthly billing cycle. You'll maintain excellent standing by making at least the minimum payment and doing it promptly. Customers can use it to transact in the purchase of goods and services.

Computation of Interest

Given

Balance = $ 5,440

APR = 17.7%

[tex]$1,136.61 a month\\ for 5 months \\1136.61 * 5 - 5440 = $243.05[/tex]

Learn more about Interest here

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Assume a person saves $62 a month by using coupons and doing comparison shopping.
a. what is the amount of annual savings? annual savings amount $
b. what would be the future value of this annual amount over 10 years, assuming an interest rate of 4 percent

Answers

a) Annual savings would be $62 * 12 = $744
   
b) Future value of the first year savings over 10 years would be = $ 744 * (1 + 0.04)^10 = $1101.30. However, if the person adds $744 every year to the compound interest, the total saving should be around $10,391.15.

Final answer:

The annual savings from saving $62 a month is $744. The future value of these savings over 10 years at a 4% interest rate is $8,928.47.

Explanation:

To calculate the annual savings from saving $62 a month, we multiply that amount by 12, the number of months in a year:

$62/month × 12 months/year = $744/year

To calculate the future value of these annual savings over 10 years at an interest rate of 4%, we use the future value formula for an annuity:

Future Value = P × [((1 + r)^n - 1) / r]

Where:

P = annual payment ($744)

r = annual interest rate (4%, or 0.04)

n = number of periods (10 years)

Insert the values into the formula:

P×[((1+0.04)^10 - 1) / 0.04]

Calculate the future value:

$744 × [((1.04)^10 - 1) / 0.04]

$744 × [(1.48024 - 1) / 0.04]

$744 × [0.48024 / 0.04]

$744 × 12.006 = $8,928.47

So, the future value of the annual savings over 10 years at a 4% interest rate is $8,928.47.

The point of a fluctuation at which an economy turns from a recession to an expansion is called a ________.

Answers

The answer is trough. In economics, it is a low decision point or a local minimum of a business cycle. The time fruition of many variables of economics display a wave like performance with local maxima or also known as peaks subsequent to local minima or troughs. A business cycle may be demarcated as the period between two successive peaks.

Jon says to kristy, "i would like to sell you my sports memorabilia collec-tion." this is not an offer because it

Answers

Because in business, an offer is a proposition of a seller to provide something to a particular buyer with specific conditions. SInce there are no conditions and any desirable value for the buyer in the scenario, this is not considered an offer yet. 
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