An artifact was found and tested for its carbon-14 content. If 74% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. 1 yr

22,322 results
  1. science

    The ocean stores carbon from its interactions with the atmosphere, so the ocean serves as (a) _________ for the carbon cycle. carbon flux carbon dioxide carbon source carbon sink*** Bacteria add carbon to the carbon cycle by decomposing dead organisms.***

  2. 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.

  3. math

    A wooden artifact from an ancient tomb contains 70% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)

  4. 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

  5. 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

  6. Chemistry

    The cloth shroud from around a mummy is found to have a carbon-14 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 half-life for

  7. 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

  8. Calculus

    For the decomposition of Carbon 14, find the age of a prehistoric cave painting discovered in the Lascaux Caves in southern France if the amount of Carbon 14 has decayed to 14.29%...again using calculus formulas. Not sure how to use this equation (content

  9. MATH 123

    A wooden artifact from an ancient tomb contains 55% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)

  10. chemistry

    An unknown compound contains only carbon, hydrogen, and oxygen (CxHxOx). Combustion of 3.50G of this compound produced 5.13G of carbon dioxide and 2.10G of water A.How many moles of carbon, , were in the original sample? b. How many moles of hydrogen, ,

  11. algebra

    Use the fact that after 5715 years a given amount of carbon 14 will have decayed to half the original amount to find the exponential decay model for carbon 14. In 1947, earthenware jars containing what was known as the Dead Sea scrolls were found by an

  12. chemistry help

    When carbon dioxide and carbon react the balanced equation is Co2+C--------------2Cq Calculate the mass of carbon monoxide formed from 4.4g of carbon dioxide

  13. math

    An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  14. physics

    A wooden artifact is found in an ancient tomb. Its carbon-14 activity is measured to be 60.0% of that in a fresh sample of wood from the same region. Assuming the same amount of carbon-14 was initially present in the wood from which the artifact was made,

  15. algebra 2

    In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an initial amount A0 at a given time t, and k is a negative constant determined by the nature of the material. An artifact is discovered at a certain site. If it has 72% of

  16. Algebra

    A wooden artifact from an ancient tomb contains 45 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made

  17. Astronomy

    One possible energy source for the mysterious object you've just discovered is the fusion of hydrogen to form carbon-12 (the most common and stable isotope of Carbon). Hydrogen has an atomic mass of 1.00794 u, while carbon has an atomic mass of 12.010 u.

  18. MA240 Please help

    An artifact originally had 16 grams of carbon-14 present. The decay model A = 16e -0.000121t describes the amount of carbon-14 present after t years. How many grams of carbon-14 will be present in 5715 years? A. Approximately 7 grams B. Approximately 8

  19. applied algebra

    An artifact was found and tested for its carbon-14 content. If 74% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. 1 yr

  20. Chemistry

    An archeological artifact was subjected to radiocarbon dating. The artifact showed a carbon-14 decay rate of 13.8 disintegrations/ min per gram of carbon. Carbon-14 has a half-life of 5715 years, and currently living organisms decay at the rate of 15.3

  21. physical science

    An artifact contains one-fourth as much carbon-14 as the atmosphere. How old is the artifact? Use Figure 10-3 to answer this question.

  22. 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?

  23. 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 243.0 ppm and is initially uniform through the thickness of the

  24. algebra

    An artifact was found and tested for its carbon-14 content. If 84% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  25. math

    An artifact was found and tested for its carbon-14 content. If 81% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. yr

  26. algebra

    An artifact was found and tested for its carbon-14 content. If 75% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.) thank you

  27. math

    An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)

  28. algebra

    An artifact was found and tested for its carbon-14 content. If 84% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  29. College Math

    An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  30. math

    An artifact was found and tested for its carbon-14 content. If 76% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  31. Algebra

    An artifact was found and tested for its carbon-14 content. If 77% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  32. algebra

    An artifact was found and tested for its carbon-14 content. If 79% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  33. Math

    An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years. ? yr

  34. Algebra

    An artifact was found and tested for its carbon-14 content. If 76% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)

  35. math

    An artifact was found and tested for its carbon-14 content. If 76% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)

  36. Homework test

    An artifact was found and tested for its carbon-14 content. If 70% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  37. math

    An artifact was found and tested for its carbon-14 content. If 83% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  38. Algebra

    An artifact was found and tested for its carbon-14 content. If 75% of the original carbon-14 was still present what is its probable age to the nearest 100 years?. carbon -14 has a half-life of 5,730 years.

  39. math

    An artifact was found and tested for its carbon-14 content. If 83% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

  40. Can some guide me

    An artifact was found and tested for its carbon-14 content. If 71% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.)

  41. Algebra

    An artifact was found and tested for its carbon-14 content. If 74% of the orginal carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half life of 5730 years).

  42. Chemistry

    An artifact has a carbon-14 to carbon-12 ratio that is one-fourth the carbon-14 to carbon-12 ratio of a similar modern object. How old is the artifact? (The half-life of carbon-14 is 5,715 years.)

  43. Calculus

    An artifact was found with 63.8% of Carbon 14, how old is the mummy, assuming the half-life of Carbon 14 is 5730 years.

  44. calculus

    A wooden artifact recovered from a tomb contains 29% of the carbon-14 that is present in living trees. The half life of carbon-14 is 5730 years. How long ago was the artifact made?

  45. Pre-calc

    A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made? (The half-life of carbon-14 is 5730 years.)

  46. College Algebra

    This exercise uses the radioactive decay model. A wooden artifact from an ancient tomb contains 80% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the

  47. biology

    The answer to which of these scientific questions would MOST likely explain why all life on Earth is based on carbon? A. How many carbon isotopes are stable? B. How much carbon is found in Earth’s crust? C. What are the naturally occurring states of

  48. physics

    You are on an archaeological dig and discover a strange artifact. It is a utensil that appears to be carved out of an elephant's tusk You analyze it and discover that it has 0.625 the amount of carbon-14 you would find in a living specimen. 1.How many

  49. physics

    You are at a archeological dig an discover a strange artifact. It is a utinsil tha appears to be carved out of an elephant's tusk You analyze it and discover that it has 0.625 the amount of carbon -14 you woul find in a living specimen. How many half lives

  50. Physics

    (a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it died, determine the age of the fossil? Half life of Carbon-14 is 5700 years. (b)How much Carbon-14 will be present in the sample

  51. Physics

    (a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it died, determine the age of the fossil? Half life of Carbon-14 is 5700 years. (b)How much Carbon-14 will be present in the sample

  52. Intermediate Maths

    (a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it died, determine the age of the fossil? Half life of Carbon-14 is 5700 years. (b)How much Carbon-14 will be present in the sample

  53. Final Maths

    (a)-A fossilised tree was tested and contains 10 grams of Carbon-14. Given that there was 12 grams of Carbon-14 present when it died, determine the age of the fossil? Half life of Carbon-14 is 5700 years. (b)How much Carbon-14 will be present in the sample

  54. College Math

    Only 43% ofthe carbon-14 in an artifact remains. How old is the artifact? Would the answer be less than the half life?

  55. Chemistry

    A piece of wood found in an ancient city has a carbon-14 to carbon-12 ratio that is one-eighth the carbon-14 to carbon-12 ratio of a tree growing nearby. How old is the piece of wood? (The half-life of carbon-14 is 5,715 years.)

  56. College Algebra

    A wooden artifact from an ancient tomb contains 45% of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made

  57. physics

    before 1900 the activity per mass of atmospheric carbon due to the presence of carbon-14 averaged about 0.255bq/g of carbon 1. what fraction of carbon is carbon-14

  58. physics

    before 1900 the activity per mass of atmospheric carbon due to the presence of carbon-14 averaged about 0.255bq/g of carbon 1. what fraction of carbon is carbon-14

  59. Chem 2 help

    what is the significance of calculating the half life of a reaction? How has the concept of half-life 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

  60. Calculus Help Please!!! URGENT!!!!

    Carbon-14 has a half-life of 5700 years. In a living organism, the ratio of radioactive carbon-14 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

  61. chemistry

    "Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the

  62. Chemistry

    Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the

  63. science

    my teacher gave us this question and im lost. Anthropologists have found an old campsite in a remote location. After calculating the carbon-14 in the wood, they determine that there is 1/8 of the original material left. How many half-lives of carbon-14

  64. 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

  65. 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

  66. 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

  67. chemistry

    i cant understand anything in carbon and its compounds. can you give me any the basics of what i need to learn in carbon and its compounds Carbon has a usual oxidation state(valence) of +4 and it can bond to itself. Therefore, there are millions of carbon

  68. Radioactivity

    1. A granite rock is thought to be about 2 billion years old. why is it not possible to determine the age of the Rock using carbon-14 dating? 2. A hair sample has 80% of its original carbon-14 present. what is the age of the sample? 3. A bone fragment has

  69. can you help me with one science question Ms. Sue

    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.

  70. Science

    (Another question sorry!) Which of the following is true of carbon? A. Carbon is present in all organisms and in the atmosphere.** B. Carbon moves from consumers to producers. C. Carbon must be fixed by bacteria before other organisms can use it. D. Carbon

  71. Science

    Which of the following is true of carbon? A. Carbon is present in all organisms and the atmosphere** B. Carbon moves from consumers to producers C. Carbon must be fixed by bacteria before other organisms can use it D. Carbon can only be released from dead

  72. chemistry

    The radioactive decay of carbon-14 is first-order and the half-life is 5800 years. While a plant or animal is living, it has a constant proportion of carbon-14 (relative to carbon-12) in its composition. When the organism dies, the proportion of carbon-14

  73. 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!

  74. Chemistry

    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 200.5 ppm and is initially uniform through the thickness of the steel. The

  75. 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 176.0 ppm and is initially uniform through the thickness of the

  76. 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 490.5 ppm and is initially uniform through the thickness of the

  77. 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 379.0 ppm and is initially uniform through the thickness of the

  78. 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 141.0 ppm and is initially uniform through the thickness of the

  79. help

    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 478.5 ppm and is initially uniform through the thickness of the

  80. 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 165.0 ppm and is initially uniform through the thickness of the

  81. 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 165.0 ppm and is initially uniform through the thickness of the

  82. 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 359.5 ppm and is initially uniform through the thickness of the

  83. 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 165.0 ppm and is initially uniform through the thickness of the

  84. 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 211.5 ppm and is initially uniform through the thickness of the

  85. 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 200.5 ppm and is initially uniform through the thickness of the

  86. 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 193.5 ppm and is initially uniform through the thickness of the

  87. 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 325.5 ppm and is initially uniform through the thickness of the

  88. 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 223.0 ppm and is initially uniform through the thickness of the

  89. 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 213.5 ppm and is initially uniform through the thickness of the

  90. 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 390.5 ppm and is initially uniform through the thickness of the

  91. 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 359.5 ppm and is initially uniform through the thickness of the

  92. 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 244.5 ppm and is initially uniform through the thickness of the

  93. 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 263.5 ppm and is initially uniform through the thickness of the

  94. 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 299.0 ppm and is initially uniform through the thickness of the

  95. 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 165.0 ppm and is initially uniform through the thickness of the

  96. Chemistry help please

    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 359.5 ppm and is initially uniform through the thickness of the

  97. 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

  98. Maths

    May someone help me with my HW problem (b)? Radiocarbon dating can be used to estimate the age of material, such as animal bones or plant remains, that comes from a formerly living organism. When the organism dies, the amount of carbon-14 in its remains

  99. Chem URGENT!!

    Which bond is most polar? F-Cl O-P O-S F-F Si-O 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

  100. pre calculus

    The age of a document is in dispute, so archaeologists test for carbon-14. Due to radioactive decay, the amount A of carbon -14 present compared to the initial amount A0 after t years is given by the formula A(t) = A0e^-0.000124t . If 72% of the original

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