A student uses visible spectrophotometry to determine the concentration of CoCl2(aq) in a sample solution. First the student prepares a set of CoCl2(aq) solutions of known concentration. Then the student uses a spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of 510nm and constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown concentration.

A wavelength of 510nm corresponds to an approximate frequency of 6×1014s−1. What is the approximate energy of one photon of this light?

9×1047J
3×1017J
5×10−7J
4×10−19J

Answers

Answer 1

Answer:

E = 4 × 10⁻¹⁹ J

Explanation:

It is given that,

Wavelength = 510 nm

Frequency = [tex]6\times 10^{14}\ Hz[/tex]

We need to find the approximate energy of one photon of this light. The formula for the energy of a photon is given by :

[tex]E=hf\\\\=6.63\times 10^{-34}\times 6\times 10^{14}\\\\=3.97\times 10^{-19}\ J[/tex]

or

E = 4 × 10⁻¹⁹ J

Hence, the correct option is (d).


Related Questions

Order −0.8, 2
3
, 1, −1
3
from least to greatest.

A number line going from negative 1 to positive 1.

Which order is correct?
Negative 0.8, negative one-third, two-thirds, 1
Negative 0.8, two-thirds, 1, negative one-third
Negative one-third, negative 0.8, two-thirds, 1
1, two-thirds, negative one-third, negative 0.8

Answers

Answer:

-0.8,-1/3, 2/3, 1

Explanation:

Convert the fractions to decimals, and then arrange from least to greatest.

-1/3 = -0.3333

2/3 = .66667

Answer:

i can confirm the other answer above me, it's right.

Explanation:

- 0.8 , 1/3 , 1/3 and 1

Describe two hospitality situations in which a verbal contract is superior to a written contract, and explain why you believe it to be so.


hellooo please help me

Answers

The correct answer to this open question is the following.

The two hospitality situations in which a verbal contract is superior to a written contract are, for instance, when you go to a restaurant and place your order to the waiter. He just simply take the order and the restaurant does not force you to sign any contract in which are required to consume the food and to pay for it.

The same happens when you order room service in the hotel. You just place ypur order and that's it. It comes right at you.

Under the system of uses and customs, people know that when they place an order, you are required to pay for the service without any contract.

And those are two ways that a verbal contract works in the particular business of hospitality.

Read the directions.

Cheese and Vegetable Omelet

1. Crack two eggs in a bowl, and whisk them with a fork until the eggs are thoroughly blended.

2. Add 2 tablespoons of milk to the bowl, and whisk.

3. Place a pan over medium heat, and lightly coat it with a non-stick cooking spray.

4. Pour the egg mixture into a pan, and cook until the edge of the egg turns a golden brown.

5. Sprinkle shredded cheese and chopped vegetables evenly on top of the egg. Continue cooking until the cheese begins to melt.

6. Using a spatula, carefully fold the egg in half.

7. Carefully slide the omelet onto a plate.

What is the purpose of these directions?

to explain how to make an omelet
to explain why omelets taste good
to explain why eggs stick to pans
to explain how to whisk eggs with milk

Answers

Answer:

To explain how to make a omelet

Explanation:

Because it gives step by step instructions on how you should make it (:

Answer:

Guy above me is right for proof its "to explain how to make an omelet".

Explanation:

A way to build good credit is...
using only credit cards.
using only secured loans.
None of the choices.
O paying bills when they are due.

Answers

Answer:

Paying bills when they are due

Explanation:

Note that a way to build good credit is by paying bills when they are due (option D).

Why is this so?

Timely payment of bills, such as credit card bills, loan installments, and other financial obligations, is a crucial factor in establishing and maintaining a positive credit history.

Consistently making payments on time demonstrates responsible financial behavior and reliability to lenders and credit agencies. This, in turn, helps build a solid credit score and reputation.

While using credit cards and secured loans can also contribute to building credit, the key factor that significantly impacts creditworthiness is the consistent and punctual payment of bills.

Learn more about credit rating at:

https://brainly.com/question/29548283

#SPJ6

Which are challenges for study groups? Check all that apply. lack of focus during meetings too many new perspectives O problems with communication O lack of commitment to duties overly motivated participants​

Answers

Answer: 1, 4

Explanation: It is right!!

Answer:

It is 1 3 4

Explanation:

I just got a hundred percent on the unit test

NEED HELP ASAP WILL GIVE BRAINLIST

Answers

Answer:

The image shows translation. The rna is being translated in the ribosome into proteins by every 3 genes.

(tbh i forgot all the extra details)

Which of the following describes an example of a consequent boundary? a The Berlin Wall between East and West Germany no longer exists, but the location is still evident. b European powers divided Africa at the Berlin Conference and drew boundaries across the continent. c The United States–Canadian boundary was set at the 49th parallel by a treaty before the area was settled. d Canada created the province of Nunavut to provide greater autonomy for the First Nations.

Answers

Answer:

d Canada created the province of Nunavut to provide greater autonomy for the First Nations.

Explanation:

Consequent boundaries are those boundaries that are formed due to political, ethnic, language, or religious reasons. The creation of the Nunavut boundary in Canada was based on ethnic and political lines.

The province at the time of creation was made up of 82 percent of the Inuit people. This territory was created by the Canadian government on April 1, 1999, to recognize the territorial rights of the indigenous Inuit people.    

Country Boundary often show the demarcation between two countries. The best description of consequent boundary is the United States–Canadian boundary was set at the 49th parallel by a treaty before the area was settled.

Consequent boundaries is simply noted as when some cultural divide in terms of religion or language.

It is also called ethnographic boundary. Example: when the British colonial rule ended, the boundaries between India & Pakistan/Bangladesh were drawn bas a result of religious differences.

Learn more from

https://brainly.com/question/20505432

Ms. Baraque spent $28 for 8 notebooks. If each notebook sells for the same price, how much would she have to spend for 48 notebooks?

Answers

Answer:

She would have to spend $168

Explanation:

Step one:

Divide 28 by 8 to find out how much one individual notebook costs.

28/8 = $3.50

$3.50(a)

a = amount of notebooks bought

Now multiply it by how many she buys

$3.50(48) = $168

This means she spend $168 on 48 notebooks.

Answer:

$168

Explanation:

28÷8=3.5

3.5×48=168

3.5=unit price

A company that ships crystal bowls claims that bowls arrive undamaged in 95 percent of the shipments. Let the random variable G represent the number of shipments with undamaged bowls in 25 randomly selected shipments. Random variable G follows a binomial distribution with a mean of 23.75 shipments and a standard deviation of approximately 1.09 shipments. Which of the following is the best interpretation of the mean?

Answers

Answer:

On average, the company receives 23.75 shipments before receiving the first shipment with a damaged bowl.

Explanation:

The best interpretation of the mean is that; For all possible shipments of size 25, the average number of undamaged shipments is equal to 23.75.

We are given;

sample size; n = 25 shipments

Sample mean; x' = 23.75 shipments

Standard deviation; σ = 1.09 shipments

Now, since the random variable G represents the number of shipments with undamaged bowls in the sample size of n = 25, it means;

we can conclude that for all possible with sample size of 25, the average number of undamaged shipments is an average of 23,75.

Read more about random binomial distribution at; https://brainly.com/question/15276168

A box contain 16 chocolates and 3 are know to have nuts two chocolates are selected at random find the probablilty that a).exactly 1 chocolate contains nuts. B).atleast one chocolate contains nuts

Answers

Answer:

Explanation:

 

Which of the Earth’s spheres is made up of the gases and air that surround the Earth and sustain life?
A.
the hydrosphere
B.
the lithosphere
C.
the biosphere
D.
the atmosphere

Answers

D. The answer is the atmosphere

Answer:

D. Atmosphere

Explanation:

A contract as a basis for group membership is a typical characteristic of which of the following?

Answers

Answer:

mepw

Explanation:

dogs

A contract as a basis for group membership is a typical characteristic of: group life insurance.

What is a contract?

A contract can be defined as a formally writen agreement between two or more parties such as a group of people, team, etc., which primarily gives rise to a mutual legal obligation that is enforceable by law.

In this context, a contract as a basis for group membership is a typical characteristic of group life insurance because there must be a collective agreement beween the parties involved.

Read more on a contract here: https://brainly.com/question/17185606

Why do some lenders require borrowers to secure credit?
O to make sure they are smart
O to guarantee full repayment
to reduce risk
to prevent defaults

Answers

I think to prevent defaults I may be wrong

I think to prevent defaults I may be wrong

Select the correct answer.
Which activity will not strengthen your heart and lungs?
A. Biking
B. Playing soccer
C. Stretching
D. Jump rope

Answers

Probably C. Stretching.

Answer: C. Stretching

Explanation:

Hope I Helped!:)

Fix my paragraph or improve that paragraph

The evolution of Income Tax has taken many forms and still influences us today.
Many people still want to change the Income Tax.
The reason is that they make a lot of money from their check and it is bad because they work for it, some people really need the money.
People don’t like how they change the Income Tax before
They still didn’t change it like how people wanted income tax to look, the more much money you get the more tax they take off, and still, people don’t like it
The evolution of Income Tax has taken many forms and still influences us today because people can’t change anything they told them to.

Answers

The evolution of income Taxes has token many forms and still influences us today, Many people still want to change that income tax.
The reason is that they make a lot of money from their check and it is bad because they work for it, some people really have use to that money.

People don’t like how they change the income tax before.
They still didn’t change it like how people wanted the income tax to look, the much more money you get the more tax they take off and still people don’t like it.
The evolution of income taxes have taken many forms and still influence us today because people can’t change anything they told them to.

Which of the following describes famine?
A. Overnutrition caused by too many calories, usually of poor quality
B. Acute starvation, usually caused by a natural or political disaster
C. Chronic hunger, usually caused by poverty
D. Malnutrition caused by a lack of specific essential nutrients

Answers

Answer:

B one of the main causes is natural disasters

Answer:

b

Explanation:

just took the quiz

Don't use such phrases here, not cool! It hurts our feelings :(

Answers

Answer:

FRRRR

Explanation:

Worth 30 points!!!!
Match the terms with their descriptions

Answers

Answer:

things you want to accomplish ----> Goals

selecting from available options----> decision making

things to help you achieve your goals----> resources

ranking tasks in their order of importance----> Prioritizing

goals- things you want to accomplish
resource- things to help you achieve your goal
decision making- selecting from available options
prioritizing- ranking tasks in their order of importance
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