1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
natulia [17]
3 years ago
8

Charcoal (burned wood) that was used to make prehistoric drawings on cave walls in france was scraped off and analyzed. the resu

lts were 8 mg-carbon-14 (parent isotope) and 56 mg hitrogen (daughter isotope). the half-life of carbon-14 is 5,730 years. how old are the cave drawings?
Chemistry
1 answer:
romanna [79]3 years ago
8 0
Around 36 million years ago
You might be interested in
Which of the following statements about decomposition reactions is true?
Andreyy89
C

Decomposition is of this form: A becomes B+C ... so after the reaction, the element A DECOMPOSES into two smaller elements, B and C.

Synthesis is the opposite: B+C becomes A AFTER THE REACTION.

Hope that helps :))
8 0
4 years ago
Read 2 more answers
The half-life of radon-222 is 3.8 days. If a sample currently contains 3.1 grams of radon-222, how much radon-222 did this sampl
vodka [1.7K]

The   number  of grams of  radon 222 did it have 15.2  ago was  49.6 grams( answer  C)

 <u>calculation</u>

  • calculate the number of half life it has covered    from   15.2  days to 3.8 days

             that is  divide 15.2/ 3.8 = 4 half life

  •  half  life is time taken for a radio activity  of a specified isotope to fall to half its original mass

therefore  3.8 days ago  it was  3.1 x2 =  6.2 grams

                  7.6 days ago  it was 6.2 x2 = 12.4 grams

                   11.4  days  ago it was 12.4  x2=  24.8  grams

                  15.2  days  ago  it was  24.8 x2=49.6 grams





5 0
3 years ago
9. What is the process of nuclear fusion? *
Pavlova-9 [17]

Answer:

the process of carrying light

5 0
3 years ago
A sample of gold has a mass of 15.7 g and displaces 0.81 cm3 of eater in a graduated cylinder. What is the density of gold?
Ostrovityanka [42]

Answer: 19.4 g/cm3

Explanation: density is the relationship between mass over volume.

So density of gold is 15.7g/0.81cm3 = 19.4 g/cm3

3 0
4 years ago
Pls help 8th grade k12
I am Lyosha [343]
Look it up online you will find it
6 0
2 years ago
Other questions:
  • A 72.0-gram piece of metal at 96.0 °C is placed in 130.0 g of water in a calorimeter at 25.5 °C. The final temperature in the ca
    9·1 answer
  • An Equilibrium with Cobalt Complex Ions.Investigate the equilibrium between two different complex ions of cobalt. The reaction i
    7·1 answer
  • the average kinetic energy of the particles in a gas increases as the temperature of the gas increases. explain​
    12·2 answers
  • What ingredients are needed to make GHB?
    15·1 answer
  • The electron domain and molecular geometry of NF₃ are ________.
    10·1 answer
  • What is the balanced chemical equation for the reaction used to calculate ΔH∘f of SrCO3(s)? If fractional coefficients are requi
    10·1 answer
  • Which of the following pairs of elements is most likely to form an ionic compound?
    15·1 answer
  • How do the electron configurations for chlorine explain the steps pls
    14·1 answer
  • What is haber's process?​
    10·2 answers
  • What is gravitational energy? Please help.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!