1. You have 4.0 g of NaCl. Calculate the number of moles of
NaCl this is (show your work).

Answers

Answer 1

Explanation:

i suppose this is chemistry..

no of moles = mass / molar mass

you are given the mass, 4.0g, you need to find the molar mass ( Mr ) of NaCl.

Mr = 23 + 35.5

Mr = 58.5

now that you know the Mr of Nacl, just use the formula:

n = m/mr

n= 4/ 58.5

n= 0.068376..

no of moles = 0.068 moles.


Related Questions

With the aid of chemical equation describe the process of photosynthesis

Answers

Answer:

The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen.

Explanation:

The photosynthesis equation is as follows: 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2 Carbon dioxide + water + energy from light produces glucose and oxygen. ... In most plants, water is supplied from the roots, with the leaves collecting carbon dioxide via the stomata and sunlight captured by the chloroplasts in the leaves.

5 facts about The Immortal life of Henrietta lacks

Answers

Explanation:

1. Henrietta Lacks died from a cancer whose cells also made her immortal.

2. Lacks never knew doctors took her cells ― and neither did her family, for decades.

3. Her name was changed from Henrietta Lacks to Helen Lane.

4. HeLa cells have led to countless medical breakthroughs.

5. Her family, while never given compensation, says her spirit continues to live on.

The Immortal Life of Henrietta Lacks is a nonfiction book by Rebecca Skloot that tells the story of Henrietta Lacks.

What is The Immortal life of Henrietta Lacks?

The book explores the story of Henrietta Lacks, an African-American woman whose cancer cells were used without her knowledge for scientific research.Henrietta's cells, known as HeLa cells, were the first human cells to grow indefinitely in a lab, making them invaluable to scientific research.The book raises ethical questions about informed consent, patient rights, and the commercialization of human tissue and genetic material.Henrietta's story sheds light on issues of racial inequality and the exploitation of marginalized communities in medical research.The book also explores the impact of Henrietta's cells on medical breakthroughs such as the development of the polio vaccine and cancer treatments.

Learn more about The Immortal life of Henrietta Lacks, here:

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Question 4 of 5
Which prediction is most likely when the air pressure decreases?
A. Clear skies will become stormy.
B. Heavy precipitation will continue.
C. Wind speeds will decrease.
D. Temperatures will decrease.
SUBMIT

Answers

Explanation:

HEY. buddy

what's up dude

i am Indian

what about you

can any one free coming in my meeting

The fungus Botrytis is known to cause rot in fruit and decrease the harvest. In an effort to limit the damage, some agriculturalists spray the soil of orchards with fungicides. The effect of fungicides is not specific for Botrytis and kills most fungi in the soil. In a short answer, predict what would happen to the yield of grapes following fumigation and explain the rationale for your prediction.

Answers

The yield of grapes following fumigation will be decreased as a result of the effect of fungicides not being specific.

What is Mycorrhizal fungi?

This is a type of fungi which is present in the soil and helps plant to absorb more nutrients and water.

Tbis fungi also increases microbial activity which are needed for optimal growth of  of the grape. Application of the fungicide will kill these beneficial fungi thereby leading to a decrease in the yield.

Read more about Mycorrhizal fungi here https://brainly.com/question/8837912

caused by vasoconstriction of the dermal blood vessels

Answers

Answer:

Pallor is caused by vasoconstriction of the dermal blood vessels

Explanation:

Pallor is paleness or wanness usually caused by vasoconstriction of the dermal blood vessels.


In other words. A deficiency in the color of the face.

Congressional committees are an important part of work done in congress. Which tasks are done by committees?

Answers

Answer:

Committees are an essential part of the legislative process. Senate committees monitor on-going governmental operations, identify issues suitable for legislative review, gather and evaluate information, and recommend courses of action to the Senate.

Explanation:

What do all living things have? Check all that apply

Answers

Answer:

What are the options? Here are some possible answers though:

are made of cells

need energy

can breathe

respond to stimuli

can reproduce

grow and develop

Explanation:

The Toleration Act of 1649 did not stop all religious conflict.

Answer choices

true or false​

Answers

I feel as if the answer is true

What would happen to the daughter cells if a cell skipped metaphase during mitosis

Answers

Answer:

If mitosis skipped metaphase then it would be able to make the daughter cells different from the parent cells.

Explanation:

1. Explain the roles of environment and genetics in causing cancer. GUYS PLS HELP ME.ILL GIVE U BRAINLIEST JUST PLS HELP​

Answers

Answer:

Cancer is caused by changes to certain genes that alter the way our cells function. Some of these genetic changes occur naturally when DNA is replicated during the process of cell division. But others are the result of environmental exposures that damage DNA.

Dimples (D) are a dominant trait. Two parents with dimples have 3 children, one with dimples
and 2 with no dimples. Determine the genotypes of all the members of this family.

Answers

Answer:

Parent 1 genotype: Dd

Parent 2 genotype: Dd

Child 1 (dimples): Dd or DD

Child 2 (no dimples): dd

Child 3 (no dimples): dd

Explanation:

No dimples (d) - recessive

D (dimples) masks d (no dimples), therefore D (dimples) is expressed

The image shows prairie plants that live in an ecosystem. Which best describes a feature of the prairie plants that allow them to compete with each other?
A. The leaves help the prairie plants compete for warmth.
B. The long roots help the prairie plants compete for food.
C. The leaves help the prairie plants compete for sunlight.
D. The long roots help the prairie plants compete for water.

Answers

The answer is D because the long roots do help the prairie plants compete for water.

Which
component is missing from the process of cellular respiration?
+ Oxygen -› Carbon Dioxide + Water + Energy
Sunlight
Sugar
Oxygen
Carbon

Answers

Answer:

Sunlight

Explanation:

Because you need oxygen carbon dioxide water sunlight and energy to process the cycles

explain effect of rain on germination of the seed​

Answers

Explanation:

rain water supports seeds

The cause of many volcanic eruptions is the movement of…
a. Earth’s mesosphere b. Earth’s inner core c. Earth’s tectonic plates d. Earth’s oceans

Answers

D is your answer because of the way the ocean moves

Help me please I need to pass
Earth and space

Answers

Answer:

I think B and D

Explanation:

A moraine is a mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.

PLSSSSS HELP ME and I’ll mark u branniest or what ever it is

Answers

Answer:

interphase

Explanation:

a cell spends most of its time in this stage.  it grows, and replicates chromosomes and prepares for cell division

The Industrial Revolution resulted in

Question 1 options:

handmade goods


a shortage of workers on farms


a great migration of people from rural areas to cities


more time for people to spend with their families

Answers

Answer:

A great migration of people from rural areas to cities

Where can tephra be found?

Answers

Tephra can be found in Germany this is where it originates from

You’re talking with Liliana before her release from the hospital. Which of her statements indicates the need for further patient education

Answers

Basing this answer on the patient with a tibia fracture and open reduction, we can confirm that Liliana indicating that she should only take calcium supplements would require further patient education.

Why is this statement wrong?

Liliana will be recovering from a post-op condition. This means that she will be at risk of developing an infection. This will most likely require preemptive antibiotic supplements to reduce the likelihood of infection. This may be coupled with pain medication as well.

Therefore, since Liliana will require more medications and supplements than calcium, her statement shows the need for further patient education.

To learn more about antibiotics visit:

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When an internal or external stimulus disrupts homeostasis. Feedback mechanisms respond to
bring us back to homeostasis.
True or false

Answers

Answer: True

Hope it helps

If oxygen attoms are low concentration outside of the cell, but the cell requires more oxygen, how will the cell move the oxygen inside of the cell?​

Answers

Diffusion it won’t be osmosis since osmosis is only in regards with water oxygen should be small enough to pass throughout the cell without the need to an protein channel

what kind of plants do aquariums have? why?​

Answers

LIVE PLANTS
Live plants provide your fish a natural food source with the ability to replenish. By far the biggest benefit that live plants provide for your aquarium is that they produce oxygen (O2) and absorb the carbon dioxide (CO2) and ammonia (NH3) that your fish generate.

A muscle cramp is a sudden, painful contraction of a muscle during which movement is difficult. What is happening at the cellular level during a musde cramp?

A. A lack of calcium causes the sarcomeres to lock together. preventing relaxation.

B. Myosin and actin do not fully detach, so the muscle cannot relax.

C. The motor neuron does not send a signal, so the muscle cannot relax.

D. The proteins in the myofibrils become denatured, preventing relaxation.​

Answers

The proteins in myofibrils become denatured preventing relaxation

What are three plant structures in which amylase may be found

Answers

Answer:

soybeans, sweet potatoes, barley, potatoes, rice, tomatoes and cereal grains.

Explanation:pls mark as brainliest

Symbiotic relationships normally occur when two organisms interact in a way that benefits one or both of them. Discuss ONE symbiotic relationship that involved fungus. [5 marks]​

Answers

Fungi and other species have a number of mutualistic connections. Both creatures gain from the partnership in mutualism. Mycorrhiza and lichen are two examples of mutualistic fungus connections. The fungus produces mycelia, which aid in the absorption of water and nutrients by the plant.

Which type of literature would be best to use for a student that is writing a science research paper for one of his/her sciences courses in college?

Primary literature

Secondary literature

Tertiary literature

Answers

For a student that is writing a science research paper for one of his/her science courses in college, the best literature to use would be secondary.

Types of literature

The literature that can be consulted for research are of 3 types:

primary, secondary, and tertiary literature.

Primary literature are original research with raw data that are yet to be analyzed and conclusion drawn from.

Secondary literature are those research literature whose data has been analyzed, interpreted and conclusions drawn.

Tertiary literature are those that index primary/secondary literature.

Thus, for a college student, it is best to get information from secondary literature in which analysis and conclusions have been made about the data.

More on literature reviews can be found here; https://brainly.com/question/23677169

Do the physical characteristics given identify characteristics of the Sun, Earth, or Moon?

rocky; has mountains, valleys, and a crust; revolves around another body in our solar system



Sun and Moon

Moon

Earth

Earth and Moon

Answers

Answer:

C. Earth

Explanation:

I would say Earth because it can be rocky, it has mountains and valley, and of course, the Earth has a crust. And, it revolves around the Sun. Moon, may be rocky, but it doesn't have mountains or valleys. And it doesn't revolve around another body in the solar system. And of course, we all know the sun isn't rocky, and it doesn't have mountains or valleys. That's why my answer is C. Earth.

Answer: Earth and moon

Explanation: I JUST TOOK THE QUIZ!!!!

How do you know you have a recessive allele
or a dominant allele?

Answers

Answer:

A dominant allele produces a dominant phenotype in individuals who have one copy of the allele, which can come from just one parent. For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent.

Explanation:

What is the variation in the population?


answers;

1) smaller and larger mice

2) mice that are poisonous if eaten

3) fast and slow mice

4) light and dark colored mice

Answers

Answer:

4) the light and dark colored mice

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