If 100.0 g of carbon14 decays until only 25.0 g of carbon is left after 11,460 y, what is the halflife of carbon14?
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Chemistry
If 100.0 g of carbon14 decays until only 25.0 g of carbon is left after 11,460 y, what is the halflife of carbon14? 
math: precalculus
You have 5 grams of carbon14; whose halflife is 5730 years. a)Write the rule of the function that gives the amount of carbon14 remaining after x years. b)How much carbon14 will be left after 4,000 years? c)When will there be just 1 gram left? 
physics
The halflife of carbon14 is 5730 years. How much of a 50 g sample of carbon14 is present after 11,460 years? 
science
The halflife of carbon14 is 5730 years. If we start with 10 grams of carbon14, after 5730 years, we will have _____ of carbon14 left. 
science
The halflife of carbon14 is 5730 years. If we start with 10 grams of carbon14, after 5730 years, we will have _____ of carbon14 left. 
Chemistry
An artifact has a carbon14 to carbon12 ratio that is onefourth the carbon14 to carbon12 ratio of a similar modern object. How old is the artifact? (The halflife of carbon14 is 5,715 years.) 
Math
Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react w/ nitrogen to produce radioactive carbon14. Radioactive carbon14 enters all living tissue through carbon dioxide. As long as it is alive, carbon14 is maintained in the organism at a constant ... 
College Algebra
Carbon14 Dating. Only 10% of the carbon14 in a samll wooden bowl remains. How old is the bowl? Half life of carbon is 5700 years. 
Physics
(a)A fossilised tree was tested and contains 10 grams of Carbon14. Given that there was 12 grams of Carbon14 present when it died, determine the age of the fossil? Half life of Carbon14 is 5700 years. (b)How much Carbon14 will be present in the sample 100 years from now? 
math
An artifact was found and tested for its carbon14 content. If 76% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) 
math
An artifact was found and tested for its carbon14 content. If 79% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) 
Algebra
An artifact was found and tested for its carbon14 content. If 74% of the orginal carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a half life of 5730 years). 
Algebra
An artifact was found and tested for its carbon14 content. If 75% of the original carbon14 was still present what is its probable age to the nearest 100 years?. carbon 14 has a halflife of 5,730 years. 
algebra
An artifact was found and tested for its carbon14 content. If 75% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) thank you 
Algebra
An artifact was found and tested for its carbon14 content. If 76% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) 
Math
An artifact was found and tested for its carbon14 content. If 88% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. ? yr 
math
An artifact was found and tested for its carbon14 content. If 88% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
Algebra
An artifact was found and tested for its carbon14 content. If 77% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
algebra
An artifact was found and tested for its carbon14 content. If 79% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
math
An artifact was found and tested for its carbon14 content. If 81% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. yr 
algebra
An artifact was found and tested for its carbon14 content. If 84% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
math
An artifact was found and tested for its carbon14 content. If 76% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
algebra
An artifact was found and tested for its carbon14 content. If 84% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
math
An artifact was found and tested for its carbon14 content. If 83% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
math
An artifact was found and tested for its carbon14 content. If 83% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
Can some guide me
An artifact was found and tested for its carbon14 content. If 71% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? (Carbon14 has a halflife of 5,730 years.) 
Chemistry
A piece of wood found in an ancient city has a carbon14 to carbon12 ratio that is oneeighth the carbon14 to carbon12 ratio of a tree growing nearby. How old is the piece of wood? (The halflife of carbon14 is 5,715 years.) 
Math
The halflife of carbon14, which is used in dating archaeological finds, is 5730 yr. Assume that 100% of the carbon14 is present at time 0 yr, or x=0. Write the equation that expresses the percentage of carbon14 remaining as a function of time. 
College Math
An artifact was found and tested for its carbon14 content. If 88% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
Homework test
An artifact was found and tested for its carbon14 content. If 70% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 
applied algebra
An artifact was found and tested for its carbon14 content. If 74% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years. 1 yr 
Intermediate Maths
(a)A fossilised tree was tested and contains 10 grams of Carbon14. Given that there was 12 grams of Carbon14 present when it died, determine the age of the fossil? Half life of Carbon14 is 5700 years. (b)How much Carbon14 will be present in the sample 100 years from now? ... 
Final Maths
(a)A fossilised tree was tested and contains 10 grams of Carbon14. Given that there was 12 grams of Carbon14 present when it died, determine the age of the fossil? Half life of Carbon14 is 5700 years. (b)How much Carbon14 will be present in the sample 100 years from now? ... 
Help Please. Math
By comparing the amount of carbon14 to amount of carbon12, one can determine approx how long ago the organism died. The halflife of carbon14 is 5730 years. Assume the initial quantity of carbon14 is 600 milligrams. the equation is A (t)=600*(.5)^(t) (0,600) (1,300) (2,150... 
Chemistry
Carbon14 has a halflife of 5730 y. How much of a 144 g sample of a carbon14 will remain after 1.719 (times) 10 4y? 
Chemistry
Carbon14 has a halflife of 5730 y. How much of a 144 g sample of a carbon14 will remain after 1.719 (times) 10 4y? 
Physics
(a)A fossilised tree was tested and contains 10 grams of Carbon14. Given that there was 12 grams of Carbon14 present when it died, determine the age of the fossil? Half life of Carbon14 is 5700 years. (b)How much Carbon14 will be present in the sample 150 years from now? 
Science
Which of the following is true of carbon? Carbon is present in all organisms and in the atmosphere.* Carbon moves from consumers to producers. Carbon must be fixed by bacteria before other organisms can use it. Carbon can only be released from dead organisms by decomposers. 
physics
before 1900 the activity per mass of atmospheric carbon due to the presence of carbon14 averaged about 0.255bq/g of carbon 1. what fraction of carbon is carbon14 
physics
before 1900 the activity per mass of atmospheric carbon due to the presence of carbon14 averaged about 0.255bq/g of carbon 1. what fraction of carbon is carbon14 
Science Last question
Which of the following is true of carbon? Carbon is present in all organisms and in the atmosphere.* Carbon moves from consumers to producers. Carbon must be fixed by bacteria before other organisms can use it. Carbon can only be released from dead organisms by decomposers. 
Chem 2 help
what is the significance of calculating the half life of a reaction? How has the concept of halflife been used to develop the method of carbon dating? If a substance does not contain the element carbon can the method of carbon dating be used to date the artifact? Thanks! 
Physics
A gram of living plant material with Carbon14 , decays at a rate of about 16 disintegrations per minute. When the plant dies, the Carbon14 decays, with a halflife of 5600 years. A gram of the dead plant is found to decay at about 1 disintegration per minute. Calculate the ... 
Science
Carbon14 has a halflife of about 5,600 years. Archaeologists analyze a piece of wood found at an ancient village site and determine that, of he initial 100 grams of Carbon14 in the wood, onl 3.125 grams are left. How old is the wood? 
science  biology
A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and analyses the Carbon present. She finds... 
biology
14 points Save A photosynthesis experiment uses Chlorella to track the route taken by 14C in photosynthesis. The 14C is provided from CO2 and no new sources of CO2 are available. After the experiment the scientist extracts all of the starch produced and analyses the Carbon ... 
College Algebra
Only 34% of the carbon14 in a wooden bowl remains. How old is the bowl? (Carbon14 has a halflife of 5,700 years.) 
College Algebra
Only 27% of the carbon14 in a wooden bowl remains. How old is the bowl? (Carbon14 has a halflife of 5,700 years.) 
Chemistry
A sample of charcoal is found to have only 1/8th of Carbon14. Halflife of Carbon14 is 5730yrs, what is the age of the charcoal? 
Intro to Astronomy
The halflife of carbon 14, which is commonly used to date organic materials, is 5700 years. What is the minimum age of sample in which less than 1% of the organic carbon 14 is left? 
Math
Cosmic ray bombardment of the atmosphere produces neutrons, which in turn react with nitrogen to produce radioactive carbon14. Radioactive carbon14 enters all living tissue through carbon dioxide (via plants). As long as a plant or animal is alive, carbon14 is maintained in... 
math
only 5% of the carbon14 in a small wooden bowl remains , how old is the bowl? Hint, halflife for carbon –14 us 5730 years 
Science
Choose the explanation that does the following: (1) identifies the element used in carbon dating and (2) explains why the element is used. A. iodine131; iodine is present in the thyroid glands, is radioactive, and has a very long halflife B. nitrogen14; radioactive carbon ... 
Biology
The half life of carbon 14 is 5700 years. If the carbon 14 level measured in a fossilized bone has only 1/4 of the original amount, how old in the bone? 
Biology
The halflife of carbon14 is 5,700 years. If a sample originally had 26 g of carbon14, how much would it contain after 22,800 years? 
ChemB
The activity of carbon 14 in living tissue is 15.3 disintegrations per minute per gram of carbon. The limit for reliable determination of age is based on carbon 14 is .10 disintegration per min per gram of carbon. Calculate the max age of a sample that can be dated accurately ... 
halflife
ok so i got... the half life of carbon14 is 5730 years, the relation c+(1/2)^ N/5730 is used to calc. the concentration, c, in parts per trillion remaining n years after death determine the carbon concentration in a 11460 year old bone. please help :) 
halflife
ok so i got... the half life of carbon14 is 5730 years, the relation c+(1/2)^ N/5730 is used to calc. the concentration, c, in parts per trillion remaining n years after death determine the carbon concentration in a 11460 year old bone. please help :) 
Physics
Carbon15 has a halflife of 5730 years. As observed from Earth, what would the halflife of carbon15 be if it traveled through space at 25% of the speed of light, relative to Earth? 
ChemB
measurements of carbon 14 taken from linen wrappings of the book of isaiah from the dead sea scrolls indicate that the scrolls contain 79.5% of the carbon 14 expected in living tissue. how old are these scrolls if the half life of carbon 14 is 5730 years? All radioactive decay... 
PreCalculus
The half life of Carbon14 is 5730 years. a. find the rule of the function that gives the amount remaining from an initial quantity of 100 milligrams of carbon14 after t years. b. the burial cloth of an egyptian mummy i sestimated to contain 59% of the carbon 14 it contained ... 
Calculus
An artifact was found with 63.8% of Carbon 14, how old is the mummy, assuming the halflife of Carbon 14 is 5730 years. 
Chemistry
The cloth shroud from around a mummy is found to have a carbon14 activity of 8.1 disintegrations per minute per gram of carbon as compared with living organisms that undergo 15.2 disintegrations per minute per gram of carbon. From the halflife for carbon14 decay, 5715 yr, ... 
Environmental Science
1. How are carbon emissions related to the carbon that accumulates in the atmosphere? 2.How is carbon absorption related to the carbon that accumulates in the atmosphere? 3.What happens to carbon in the atmosphere when carbon emissions are equal to carbon absorption? 4.What ... 
Physics
Could someone help explain this problem to me . . . Carbon 14 has a halflife of 5700 year, scientist use this fact to determine the age of things made of organic material. Suppose the average page of a book containing aprox. 0.5mg of Carbon 14 is put into a time capsule how ... 
Calculus Help Please!!! URGENT!!!!
Carbon14 has a halflife of 5700 years. In a living organism, the ratio of radioactive carbon14 to ordinary carbon remains fairly constant during the lifetime of the organism. After the organism’s death no new carbon is integrated into the organism’s remains, so the ... 
Biology
The halflife of Carbon14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon14 of living organisms? Explain your calculation. 
Science
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products? A) 2 atoms of carbon (C) B) 3 atoms of carbon (C) C) 6 atoms of carbon (C)**** D) 12 atoms of carbon (C) 
Chem
Living organisms give a Carbon14 decay rate of 15.3 counts/min for each gram of carbon in the sample. A sample of bristle cone pine wood has a decay rate of 3.20 counts/min per gram of carbon. Calculate the age of the wood from the radiochemical evidence. Carbon14 has a half... 
Chemistry pretty urgent!!!!!!!
Chemical bonding question! The partial Lewis structure that follows (Figure 1) is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carboncarbon bonds are labeled 1... 
Alg2
A piece of wood discovered in an archaeological dig was found to have lost 62% of it's carbon14. Carbon14 has a halflife of 5630 years. Determine it's age. 
Math
A fossilized leaf contains 21% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the halflife of carbon 14. 
algebra 2
PLEASE HELP wiTH ALL OF THEse. I DON'T KNOW WHERE TO STARTTHANKS! 1. At 2pm the number of bacteria in a colony was 100, by 4pm it was 4000. Write an exponential function to model the population y of bacteria x hours after 2pm. 2.Using the information in problem 1, how many ... 
science
if a sample of rock starts out with 32 atoms of carbon14 how much carbon14 would be left after 5,700 years 
chemistry help
When carbon dioxide and carbon react the balanced equation is Co2+C2Cq Calculate the mass of carbon monoxide formed from 4.4g of carbon dioxide 
chemistry
Q#2..96g of sulphur reacts with 36g of carbon according to the following equation and produces carbon disulphide 2S + C = CS2 (a) the mass of carbon disulphide (b) the excess amount of the reagent in grams that is left unreacted. 
Chemistry
An archeological artifact was subjected to radiocarbon dating. The artifact showed a carbon14 decay rate of 13.8 disintegrations/ min per gram of carbon. Carbon14 has a halflife of 5715 years, and currently living organisms decay at the rate of 15.3 disintegrations/ min per... 
Exponential Decay
the halflife of carbon11 is 20 minutes. How long will it btake for 600g of carbon11 to decay to 30g? 
Math
A plant fossil lost 40 % of its carbon14. How old is the fossil? (Halflife of carbon14 is 5730 years.) 
math
Carbon14 has a halflife of 5730 years. How long will it take 17 grams of carbon14 to be reduced to 10 grams? Round to the nearest integer. 
college subject=chemistry
Q#2..96g of sulphur reacts with 36g of carbon according to the following equation and produces carbon disulphide 2S + C = CS2 (a) the mass of carbon disulphide (b) the excess amount of the reagent in grams that is left unreacted. 
Math
A bone is found to have 45% of the original amount of carbon 14. If the half life of carbon is 5600 years, how old is the bone. Would I use the formula N=No e^kt? 
physical science
a scientist found a fossilized bison. using Carbon14 dating, she found that the fossil was about 45,840 years old. Carbon14 has a halflife of 5730 years. how many halflives have passed? 
science
3. How would the carbon cycle be affected if all producers were removed? (1 point) Carbon compounds in animals would not be broken down to release carbon dioxide back into the atmosphere. Carbon would not have a way to enter the bodies of living things. Carbon dioxide levels ... 
Science Help!
Lisa studied the models of three carbon nuclei shown below. She listed information about the carbon nuclei in a table. Name Carbon 12 number of protons 6 number of neutrons 6. Name Carbon 13 number of protons 6 number of neutrons 7. Name Carbon 14 number of protons 6 number of... 
Calculus
The amount of carbon14 still present in a sample after t years is given by the function where C0 is the initial amount. Estimate the age of a sample of wood discovered by an archeologist if the carbon level in the sample is only 18% of its original carbon14 level. 
college algebra
The halflife of carbon14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 73% of the carbon14 expected in living matter, when did the tree die? 
math
1.The remains of an old campﬁre are unearthed and it is found that there is only 80% as much radioactive carbon14 in the charcoal samples from the campﬁre as there is in modern living trees. If the halflife of carbon 14 is 5730 years, how long ago did the camp... 
Precalculus
The burial cloth of an Egyptian mummy is estimated to contain 57% of the carbon14 it contained originally. How long ago was the mummy buried? (The halflife of carbon14 is 5730 years.) 
Precalculus
The burial cloth of an Egyptian mummy is estimated to contain 57% of the carbon14 it contained originally. How long ago was the mummy buried? (The halflife of carbon14 is 5730 years.) 
calculus
A wooden artifact recovered from a tomb contains 29% of the carbon14 that is present in living trees. The half life of carbon14 is 5730 years. How long ago was the artifact made? 
calculus
radioactive Carbon 14 in a dead organism decays according to the equation A=A e^.000124t where t is in years and A0 is the amount at t=0. Estimate the age of a skull uncovered in an archeological site if 10% of the original Carbon 14 is still present. 
Physical Science
Diamond is a covalently bonded substance made of pure carbon. Each carbon atom has six total electrons so this means carbon shares ________ electron(s) with other carbon atoms. A) one B) two C) four D) six Help Please! 
Chemistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 235.0 ppm and is initially uniform through the thickness of the steel. The atmosphere of... 
physics
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 206.5 ppm and is initially uniform through the thickness of the steel. The atmosphere of... 
science
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 152.0 ppm and is initially uniform through the thickness of the steel. The atmosphere of... 
Chem URGENT!!
Which bond is most polar? FCl OP OS FF SiO Which species has the shortest carbon/oxygen bond? carbon monoxide carbon dioxide carbonate anion all carbon/oxygen bonds have same length Plz Help me with this....I need to see if I answered it right I put OP for the first one... 
science
my teacher gave us this question and im lost. Anthropologists have found an old campsite in a remote location. After calculating the carbon14 in the wood, they determine that there is 1/8 of the original material left. How many halflives of carbon14 have decayed and how ... 
chimistry
You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 100.0 ppm and is initially uniform through the thickness of the steel. The atmosphere of... 
Calc
Set up an exponential function to model each real world situation then use it to find the requested values. The halflife of Carbon 14 is about 5700 years. You begin with 800 grams of this isotope. 1) Function: 2) How much Carbon 14 is there after: a) 11,400 years b) 45,000 years