How long does it take a 100.0 g sample of As-81 to decay to 6.25g?

How long does it take a180 g sample of Au-198 to decay to 1/8 its original mass?

What is the half-life of a radioactive isotope if a 500 g sample decays to 62.5g in 24.3 hours?

How old is a bone if it presently contains 0.3125 g of C-14, but it was estimated to have originally contained 80.0 g of C-14?

Thallium-208 has a half-life of 3.053 minutes. How long will it take for 120.0 grams to decay to 7.50 grams?

Answers

Answer 1

Answer:

1. Total Time: (34s)*(4) = 132s

2. 2.69 days

3. 8.10 hours

4. 5730 years*8 half lives = 45,840 years

5. 12.21


Related Questions

necesito hacer una infografia en mi computadora y nose como pueden ayudarme

Answers

Answer:

Identify the audience for your infographic.

Collect your content and relevant data.

Choose your desired infographic template.

Download your template to PowerPoint.

Customize your infographic.

Include a footer with your sources and logo.

Add an embed code and Pinterest button, and publish it.

Explanation:

Which of the following is a primary air pollutant?
smog
photochemical smog
ozone
carbon dioxide

Answers

Smogis correct ... ;))))))

Carbon monoxide is the primary air pollutant.

Primary air pollutants:

Pollutants which are formed and emitted directly from particular sources are Primary air pollutants.  

Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.

Secondary air pollutants:

Pollutants which are  formed in the lower atmosphere by chemical reactions.

example : smog

refer https://brainly.com/question/23660027

#SPJ2

how are muscles constructed?

Answers

An individual skeletal muscle may be made up of hundreds, or even thousands, of muscle fibers bundled together and wrapped in a connective tissue covering. Each muscle is surrounded by a connective tissue sheath called the epimysium. Fascia, connective tissue outside the epimysium, surrounds and separates the muscles. This is the closest information I can find
An individual skeletal muscle may be made up of hundreds, or even thousands, of muscle fibers bundled together and wrapped in a connective tissue covering. Each muscle is surrounded by a connective tissue sheath called the epimysium. Fascia, connective tissue outside the epimysium, surrounds and separates the muscles. Tendons are bands of fibrous tissue that connect muscles to bones. Muscles are all made of the same material, a type of elastic tissue (sort of like the material in a rubber band). Thousands, or even tens of thousands, of small fibers make up each muscle. Hope this helps!

Can anybody give me general information about the African straw-colored fruit bat?

Answers

Answer:

Bats Range plus Facts

Explanation:

African Fruit bats range from Arabian Peninsula, and go all the way to the savanna zones of sub Saharan. The scientific name of this species is called Eidolon helvum they are also near threatened.

who is the biologist who died at the age of 72?​

Answers

Answer:

C.L. BRISTOL DIES AT AGE OF 72; Was Emeritus Professor of Biology at New York University Since 1925.HELD CHAIR FOR 31 YEARS Won Prominence

Explanation:

Answer:PROF. C.L. BRISTOL DIES AT AGE OF 72; Was Emeritus Professor of Biology at New York University Since 1925.HELD CHAIR FOR 31 YEARS

Explanation:

Robert Hooke looked at a sliver of ______ through his microscope, where he noticed "pores" or "cells" in it. *

Answers

Answer:

cork

Explanation:

please mark this answer as brainliest

1) WHAT IS DRY ICE?
2)WHAT IS HABERS PROCESS?
3)WHICH GAS IS USED TO TAKE OUT BLUE PRINTS?
4)WRITE FULL FORM OF IUPAC.
5)COPPER IS USED TO MAKE ELECTRIC WIRE,WHY?
6)SILVER IS USED FOR MAKING ORNAMENTS BUT NOT IRON,WHY?
7)WHAT IS SEX?
8)WHAT IS VAT?

Answers

Answer:

4)WRITE FULL FORM OF IUPAC.

Explanation:

1.Dry ice is the solid form of carbon dioxide. It is used primarily as a cooling agent, but is also used in fog machines at theatres for dramatic effects. Its advantages include lower temperature than that of water ice and not leaving any residue.

2.The Haber process, also called the Haber–Bosch process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia today. It is named after its inventors, the German chemists Fritz Haber and Carl Bosch, who developed it in the first decade of the 20th century.

3.Ammonia gas

Ammonia gas is used as a developer in diazotype method to make blue prints.

4.The International Union of Pure and Applied Chemistry (IUPAC /ˈaɪjuːpæk, ˈjuː-/) is an international federation of National Adhering Organizations that represents chemists in individual countries.

5. All metals have some amount of resistivity to electrical currents, which is why they require a power source to push the current through. The lower the level of resistivity, the more electrical conductivity a metal has. Copper has low resistivity, and therefore is an excellent conductor.

6.gold and silver are used to make ornaments because in they are the least reactive and do not react with any thing . Gold and silver are ductile (cam be made into thin wires ) and they have a metallic lustre.

7. I am too smalll I am frecking 10 yrs

8. A value-added tax, known in some countries as a goods and services tax, is a type of tax that is assessed incrementally. It is levied on the price of a product or service at each stage of production, distribution, or sale to the end consumer.

Questions:

1) WHAT IS DRY ICE?

2)WHAT IS HABER'S PROCESS?

3)WHICH GAS IS USED TO TAKE OUT BLUE PRINTS?

4)WRITE FULL FORM OF IUPAC.

5)COPPER IS USED TO MAKE ELECTRIC WIRE,WHY?

6)SILVER IS USED FOR MAKING ORNAMENTS BUT NOT IRON,WHY?

7)WHAT IS SEX?

8)WHAT IS VAT?

Answer:

1) Dry ice is solid carbon dioxide (CO₂).

2) The Haber process, also called the Haber–Bosch process

3)Ammonia is used in blueprint developing machines in both forms.

4)The International Union of Pure and Applied Chemistry (IUPAC /ˈaɪjuːpæk, ˈjuː-/) is an international federation of National Adhering Organizations that represents chemists in individual countries.

Headquarters: Research Triangle Park, ‎North ...‎

Formation: 1919; 102 years ago

President: Christopher M.A. Brett (Portugal‎)‎

Membership: ICSU

5)All metals have some amount of resistivity to electrical currents, which is why they require a power source to push the current through.

6)Silver is used to make mirrors, as it is the best reflector of visible light known, although it does tarnish with time. It is also used in dental alloys, solder and brazing alloys, electrical contacts and batteries.

7)Human sexual activity, human sexual practice or human sexual behaviour is the manner in which humans experience and express their sexuality.

8)A value-added tax, known in some countries as a goods and services tax, is a type of tax that is assessed incrementally.

What are the mechanisms of evolution?

Answers

Answer:

They are: mutation, non-random mating, gene flow, finite population size (genetic drift), and natural selection.

Explanation:

i hope this helped :)

Please help me i have to turn this in or my mom will yell at me :(
NO BOTS OR TROLLS!!
Tysm

Answers

Explanation:

I'm guessing this

faster entropy

The faster the particles move ,the greater the thermal energy or kinetic (I think but positive about first one)

If an organism has a vestigial structure, that structure likely once had a function in a(n)

Answers

Answer:

Early Ancestor

i need help with this pleasee

Answers

Answer:

A   The oldest rock layer will occur at the bottom of the sequence

Explanation:

Answer:

A) At the bottom of the sequence

Explanation:

If undisturbed, rock layers will build up with time, leaving the oldest ones on the bottom as new layers are on the top.

list the 6 main functions of sugar in food preparation and give a brief description of how it is used in this capacity

Answers

Answer:

Although the main reason for the use of sugar is its sweet taste, sugar has many other functions in food technology. The most important among these are that added sugar in foods acts as a sweetener, preservative, texture modifier, fermentation substrate, flavouring and colouring agent, bulking agent.

Explanation: i dont think this the main... but hope it helps :)

what is the water intake of chlorophytes​

Answers

Answer:

Huge amount.

Explanation:

There is higher water intake of chlorophytes​ because the chlorophytes prepare their own food by using water and carbondioxide just like plants in the process of photosynthesis. These chlorophytes have chlorophyll which able these algae to make their food from sunlight and they can't live without water of dry places. Chlorophyte is also known as Prasinophyte which is a green algae. So due to photosynthesis, the chlorophytes needs high amount of water for making food.

help I do not understand :/

Answers

1.producers
2.Primary consumers
3.secondary consumers
4.tertiary consumers

Which of the following is defined as a type of roundworm possessing a digestive system that opens on both ends?
-Parasites
-nematodes
-flukes
-grubs

Answers

Answer:b

Explanation:

1.
An investigation was performed to see if corn seeds would sprout at different times depending
on the temperature of the water in which they were placed.
What is the ⬇️
Independent -
Dependent -
Constant -
Hypothesis -
Question -

Answers

Answer:

Dependent

Explanation:

Mediterranean forests, dry woodlands, and shrublands often have plants called sclerophytes living in them. What adaptation do these plants have that help them survive in this biome?

Answers

Answer:

he special characteristics that enable plants and animals to be successful in a particular environment are called adaptations. Camouflage, as in a toad's ability to blend in with its surroundings, is a common example of an adaptation. The spines on cycad leaves, keep animals from eating them.

Explanation:

Plants adapt to their environment from necessity. Plants may also adapt by growing lower and closer to the ground to shield themselves from wind and cold. Desert environments may have some of the following adaptations, these help the plant to conserve food, energy and water and still be able to reproduce effectively.

HELP!!!

Question 7 (2 points)
What is the phenotype of the F1 generation?

Answers

Answer:

yellow

Explanation:

So, the F1 generation all have identical genotypes, heterozygous at the seed color gene, and their phenotypes are yellow seeds.

Explain the supercontinent cycle in your own words.

Answers

Answer: The supercontinent cycle is the quasi-periodic collection and dispersal of Earth's continental crust. There are different theories as to whether the volume of continental crust is rising, fading, or lingering about the same, but it is accepted that the Earth's crust is constantly moving.

Which of the following best describes what the orange area represents?

Answers

Answer:

where is the picture?

Explanation:

I can't see the picture

Which is the main reason bacteria are important to the cycle of matter that occurs in a forest?
A. Bacteria use sunlight to produce food.
B. Bacteria cause diseases in plants and animals.
C. Bacteria act as a main food source for animals.
D. Bacteria break down dead plant and animal material.

Answers

The answer is c I had this question last week

Jamal investigates several interactions among organisms in a woodland ecosystem. He observes that coyotes hunt and kill white-tailed deer. He learns that lungworms live in the lungs of the deer, making it difficult for the deer to breathe. He also learns that larvae of nasal bot flies live in the nasal passages of the deer and cause them minor harm.

Which sentence describes the lungworms and fly larvae?

A. They are both hosts.
B. They are both predators.
C. They have different niches in the same habitat.
D. They compete for the same resources in a shared niche.

Answers

Answer:

C. They have different niches in the same habitat

Which term best describes a system in an animal‘s body

Answers

Answer: Interconnected

Explanation: all the systems in our bodies (humans are indeed animals) are connected with each other to create a functional being.

A person infected with HIV may


have viruses reproducing in helper T cells.

All of the above

develop the disease called AIDS.

be more susceptible to a variety of pathogens.

Answers

Explanation:

i think all of them its bettee to answer here than Philippine

Answer:

All of the above

Explanation:

HIV (human immunodeficiency virus) is a virus that attacks the body's immune system. If HIV is not treated, it can lead to AIDS (acquired immunodeficiency syndrome).Once inside the T-helper cell, HIV converts its genetic material into HIV DNA, a process called reverse transcription. The new HIV DNA then enters the nucleus of the host cell and takes control of it.

^Hope that helps, Hazel^

Which statement best describes evolution?

Answers

Answer: Traits acquired during a lifetime are passed to offspring.

Answer:

Traits acquired during a lifetime are passed to offspring

Explanation:

Evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection, so the other answes don't make sense

5. Which two systems below are most important when a person throws a dart? PLEASE HELPP!! A skeletal and circulatory systems C integumentary and skeletal systems B respiratory and excretory systems D muscular and nervous systems

Answers

Answer: Hewo, there! your answer is Below

A skeletal and circulatory systems  would be my Answer

Explanation:

the skeletal system is responsible for protection, shape, and support. For example the skeletal system protects all some of your most vital organs, such as the brain, lungs, and heart. The skeletal system creates red blood cells which the circulatory system transports. The skeletal system helps the body move.

Hope this helps!!

Have a great day!!

What does natural selection cause?
O A. Limitation
B. Conditioning
O C. Differentiation
O D. Evolution
SUB

Answers

Answer:

Evolution

Explanation:

I would say adaptation but evolution is the closest thing on here

Answer:

D. Evolution

Explanation:

Through this process of natural selection, favorable traits are transmitted through generations. Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.

O oxigênio é importante um gás na quebra de ligações entre os átomos que formam a glicose para a produção de energia. Por que a presença de ferro no nosso organismo é importante para este processo?

Answers

Answer:

It transport oxygen from lungs to the cells.

Explanation:

The presence of iron in our body is very important for this process because iron is responsible for the transportation of oxygen. Hemoglobin is made up of iron that takes oxygen from the lungs to each and every cell. Iron is an essential element for the formation of blood in human body. About 70 percent of body's iron is found in the red blood cells of our blood called hemoglobin and in the muscle cells called myoglobin. So we can say that iron is very important for the release of energy in the process of respiration.

Can someone give a superhero name for ribosome

Answers

Answer: Like maybe "Super Protein" or "The Proteinmaker"

Answer: The Protein Shaper! Super Protein! The incredible Ribosome!

Explanation:

A tiny filter-feeding barnacle sticks to a whale. The whale is unaffected by this new stowaway. What type of relationship is this?

Answers

Answer:

Commensalism

Explanation:

Other Questions
20 points Please help me match the equation with the method ty Jose wants to fence in his garden. The shape is a rectangle. Two sides are each 12 feet long. The other two sides are each 108 inches long. He buys 40 feet of fence.Part AWhat are steps he must take to see if he bought enough fence? Select all that apply.A.Convert both side lengths to the same unit.B.Find the area of the garden.C.Add 12 feet and 108 inches to find the perimeter of the garden.D.Compare the number of feet of fence he bought with the number of feet of fence he needs.Part BDid he buy enough fence?A.noB.yes Find m Jelpppsldkdhjdisjsjxjxjzjdjz If x= 10 which lines are parallel? Check all that apply. (8x - 25) b (12x - 5) (7x - 5) (10x + 15) a Help ASAP no links please the basic units involved in netwon? HELP FAST what's the difference between equality and equity? Find the volume. Round to the nearest tenth if necessary. What is timestamping, and what are the types of timestamping?a) Timestamping is a method to note a change of thought and can be done on the change of a speaker, every 40 seconds or every 2 minutes unless a client specifies otherwise.b) Timestamping is a way of acknowledging a time when a new speaker joins the conversation, and it should be done accordingly.c) Timestamping is a method of acknowledging the exact time in the audio. It can be done on the change of a speaker or every 2 minutes unless a client specifies otherwise. An oxbow lake forms when _____.A. workers construct a dam along a streamB. lakes fill to overflowingC. erosion removes all loose sediment along a riverD. deposited sediments separate a meander from the river Mingfa says, "My sister and I have $130 altogether. If my mother gives me another$10, I'll have 3 times as much money as my sister."How much money does Mingfa actually have? pls help no file pls I can't open it! During this time, many people around the world were out of work across the United States due to economic hardship. This time was called the Great Depression.Which element of a biography does the passage best show?a person's environmentan event that happened to a persona description of a person's personalityan interview with a person Try These questions out and Ill give you brainliest no links posted on My question or I will report you What life changes do peopleface in middle adulthood? Do as the question asks. I promise I will award a brainliest answer :) Study the function below and then answer the questions that follow. Equation What is the domain of f(x)? What is the range of f(x)? Which item is discounted by more than 15%A. $199.99 smartphone on sale for $167.99B. $28,100 car on sale for $24,750C. $58 jeans on sale for $50D. $1.99 song download on sale for $1.75 Is (3, 10) a solution to this system of inequalities? y 7x 2 y < 4x + 7