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
Alekssandra [29.7K]
3 years ago
15

A particular radioactive nuclide has a half-life of 1000 years. What percentage of an initial population of this nuclide has dec

ayed after 3500 years?
Chemistry
1 answer:
Delicious77 [7]3 years ago
3 0

Answer:

91.16% has decayed & 8.84% remains

Explanation:

A = A₀e⁻ᵏᵗ => ln(A/A₀) = ln(e⁻ᵏᵗ) => lnA - lnA₀ = -kt => lnA = lnA₀ - kt

Rate Constant (k) = 0.693/half-life = 0.693/10³yrs = 6.93 x 10ˉ⁴yrsˉ¹

Time (t) = 1000yrs  

A = fraction of nuclide remaining after 1000yrs

A₀ = original amount of nuclide = 1.00 (= 100%)  

lnA = lnA₀ - kt

lnA = ln(1) – (6.93 x 10ˉ⁴yrsˉ¹)(3500yrs) = -2.426

A = eˉ²∙⁴²⁶ = 0.0884 = fraction of nuclide remaining after 3500 years

Amount of nuclide decayed = 1 – 0.0884 = 0.9116 or 91.16% has decayed.

You might be interested in
Which products are the result of photosynthesis? ANSWER QUICK 99 POINTS!!!
hjlf

Answer:

glucose and oxygen

Explanation:

plants use carbondioxide, water and sunlight to produce their food through photosynthesis so in return they produce oxygen into the air as by product and glucose

4 0
3 years ago
Read 2 more answers
what kind of evidence indicates a chemical change ?... a physical change? you may use examples to show softened.
SOVA2 [1]
Some things that can indicate a chemical change are change of odor, change of color, change in temperature or energy, such as the production or loss of heat. An example could be the rusting of metal, there would be a color change of going from a shiny silver to a dirty, splotchy red color. Some things that indicate a physical change are change of appearance like change of shape, etc. It can also be like a change between a solid to liquid to gas. For example, the cutting of a piece of paper.
3 0
3 years ago
What is direct transmission?
Anna [14]
Contact transmission<span> is the most common form of </span>transmitting<span> diseases and virus. There are two types of contact </span>transmission<span>: </span>direct<span> and </span>indirect<span>. </span>Direct<span> contact</span>transmission<span> occurs when there is physical contact between an infected person and a susceptible person. Cheers and god bless
AlexFray555
Please put brainliest!</span>
4 0
3 years ago
What is an Atom? please help
JulsSmile [24]

Answer:

An atom is the basic building block of matter. Anything that has a mass-- in other words, anything that occupies space--is composed of atoms.

5 0
2 years ago
Read 2 more answers
What does it mean for the energy levels in an atom to be quantized? Describe how this affects where electrons can be found
marta [7]
When we describe the energy of a particle as quantized, we mean that only certain values of energy are allowed. ... In this case, whenever we measure the particle's energy, we will find one of those values. If the particle is measured to have 4 Joules of energy, we also know how much energy the particle can gain or lose. Quantized energy means that the electrons can possess only certain discrete energy values; values between those quantized values are not permitted
3 0
3 years ago
Other questions:
  • 24.0 mL of a 0.120 M Ca(OH)2 solution is required to titrate 160 mL of an HCl solution to its equivalence point. Find the moles
    10·2 answers
  • Which is the second step in the dissolving process?
    13·2 answers
  • Which substance is needed in order for this biochemical reaction to occur?
    9·1 answer
  • The maximum allowable concentration of Pb2+ ions in drinking water is 0.05 ppm (i.e., 0.05 g of Pb2+ in 1 million grams of water
    13·1 answer
  • Which statement is true about the electromagnetic spectrum?
    12·1 answer
  • Please help me with this chemistry question, image attached
    10·1 answer
  • Help please, 44 to 45, calculate the answers to the following problems. Use the following equation as the basis of your calculat
    10·2 answers
  • imagine that a classmate is quizzing you on the structure of an unknown element. all she can tell you is what the atomic mass is
    10·1 answer
  • A farmer is breeding his best livestock is and example of?
    5·1 answer
  • What science govern in nanostructure?​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!