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
UNO [17]
2 years ago
10

Extend your thinking: The slow decay of radioactive materials can be used to find the age of rocks, fossils, and archaeological

artifacts. In a process called radiometric dating, scientists measure the proportions of radioactive atoms and daughter atoms in an object to determine its age. Carbon-14 is a useful isotope because it is found in wood, ash, bone, and any other organic materials. You can use the Half-life Gizmo to model the decay of Carbon-14, which has a half-life of approximately 6,000 years (actual value is 5,730 years). In the Gizmo, select User chooses half-life and Theoretical decay. Set the Half-life to 6 seconds (to represent 6,000 years) and the Number of atoms to 100. Use the Gizmo to estimate the age of each of the objects below. For these questions, each second in the Gizmo represents 1,000 years. Description Age (years) Egyptian papyrus with 63% of its original carbon-14 atoms Aboriginal charcoal with 22% of its original carbon-14 atoms. Mayan headdress with 79% of its original carbon-14 atoms Neanderthal skull with 3% of its original carbon-14 atoms
Chemistry
1 answer:
lisov135 [29]2 years ago
6 0

The age in years of the Egyptian papyrus, the Aboriginal charcoal, the Mayan headdress, and the Neanderthal skull are 4000 years, 13106.5years , 2040 years, and 30353 years respectively.

<h3>What is the half-life of a radioactive material?</h3>

The half-life of a radioactive material is the time taken for half the atoms present in the material to decay or disintegrate.

The half-life, t_\frac{1}{2}, the age, t, and amount remaining, A_{r}, of a radioactive material are related by the formula below:

  • t = \frac{t_\frac{1}{2}*A_{r}}{-ln2}

Half-life of carbon-14 = 6000 years

For the Egyptian papyrus with 63% of its original carbon-14 atoms:t = \frac{6000*0.63}{-0.63} = 4000\:years

For the Aboriginal charcoal with 22% of its original carbon-14 atoms:

t = \frac{6000*0.22}{-0.63} = 13106.5\:years

For the Mayan headdress with 79% of its original carbon-14 atoms:

t = \frac{6000*0.79}{-0.63} = 2040\:years

Neanderthal skull with 3% of its original carbon-14 atoms:

t = \frac{6000*0.03}{-0.63} = 30353\:years

Therefore, the age in years of the Egyptian papyrus, the Aboriginal charcoal, the Mayan headdress, and the Neanderthal skull are 4000 years, 13106.5years , 2040 years, and 30353 years respectively.

Learn more about half-life at: brainly.com/question/26689704

#SPJ1

You might be interested in
EC
REY [17]

Answer:

a

Explanation:

this is easy its a

8 0
3 years ago
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
Elan Coil [88]

Answer:

3

2

Explanation:

3O2 => 2O3

the equation is balancing

6 0
3 years ago
Read 2 more answers
If a bat with a mass of 5 kg and acceleration of 2 m/s2 hits a ball whose mass is 0.5 kg in the forward direction, what is the r
asambeis [7]

Answer:

B: 10 N, forward

Explanation:

F= M * a

3 0
3 years ago
A student measures the heights of four bean plants grown in different types of soil. The amount of water given to each plant is
Lorico [155]

Answer:

The independent variable here is the types of soil

Explanation:

An independent variable is the variable that is not affected by the outcome of other variables in a given experiment. This variable is the variable that is intentionally altered/changed (directly or indirectly) by the researcher in order/expected to produce a result for the experiment. Thus, the independent variable here is the types of soil. This is because the soil was intentionally changed/varied by the researcher and it's expected to determine the heights of the bean plants grown.

7 0
3 years ago
The complete combustion of copper(I) sulphide is according to the following equation:
MaRussiya [10]

Answer:

a) 7.94 x 10²³ molecules, b) 5.62 g SO2, c) 1.97 L

Explanation:

a) We need to first convert Cu2S to moles. Since molar mass of Cu2S is 159.14 g/mol, 14.0 g = 0.0880 mol. Using molar ratios (3 mol O2/2 mol Cu2S, 0.0880 mol of Cu2S = 0.132 mol O2. Since 1 mol contains 6.02 x 10²³ molecules, 0.132 mol O2 = 7.94 x 10²² molecules O2.

b) Since the molar ratios of Cu2S to SO2 is 1:1, 0.0880 mol of Cu2S produces 0.0880 mol SO2. To convert mol to grams, we use the molar mass of SO2 (64.06 g/mol) to figure out that 0.0880 mol SO2 = 5.63 g SO2.

c) At STP, 1 mol occupies 22.4 liters. 0.0880 mol SO2 x 22.4 L/1 mol = 1.97 L

If you would like more tutoring in chemistry or other subjects for FREE, check out growthinyouth.org.

5 0
3 years ago
Other questions:
  • Which reaction below requires the greatest amount of amount of oxygen per mole of explosive for complete oxidation (combustion)
    15·1 answer
  • Which of these molecules has a lewis structure with a central atom having no nonbonding electron pairs?
    13·1 answer
  • How can volume be measured
    5·2 answers
  • What is the mass of 3.2 moles of h2O ?
    6·1 answer
  • Which statement correctly describes the location and charge of the protons in an atom?
    5·1 answer
  • Giving brainless to who gets it correct
    9·1 answer
  • The valence electrons of a krypton (Kr) atom in the ground state are located in the
    11·1 answer
  • Explain why Mineral water is a mixture
    9·2 answers
  • Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride:
    9·1 answer
  • Which is the heaviest element produced in large stars by nuclear fusion near the end of their life cycle?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!