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
ahrayia [7]
2 years ago
13

If the half-life of a radioactive substances is 590 million years and you have 40 atoms of it, how many half-lives will have pas

sed when 5 atoms remain
Chemistry
1 answer:
Nady [450]2 years ago
3 0

Answer:

3

Explanation:

Applying,

2^{n'} = R/R'............... Equation 1

Where n' = number of halflives that have passed, R = Original atom of the substance, R' = atom of the substance left after decay.

From the question,

Given: R = 40 atoms, R' = 5 atoms

Substitute these values into equation 1

2^{n'} = 40/5

2^{n'} = 8

2^{n'} = 2³

Equation the base,

n' = 3

You might be interested in
Light travels in _______.
Thepotemich [5.8K]
Should be C. I think
7 0
3 years ago
What's the name for Pb(NO3)2?
Vlad1618 [11]

Answer:

lead ii nitrate is the answer

5 0
3 years ago
I NEED HELP QUICK! BRAINLIEST TO WHO IS RIGHT!
Travka [436]

Answer:

3rd option

Explanation:

3 0
2 years ago
What is the mass of an atom with 15 neutrons and 13 electrons ?
slava [35]
The mass would be 28. The mass of an atom equals the number of neutrons and protons added together. In this case, they do not say the protons. But we must use our inside knowledge to know that the number of protons equals the number of electrons. Thus, your number of protons would be 13
4 0
3 years ago
1. What is a food web?
Anuta_ua [19.1K]

Answer:

a producer and consumer relationship how several food chains and related.

5 0
2 years ago
Read 2 more answers
Other questions:
  • _AgNO3 + _<br> Cu → _<br> Cu(NO3)2 + -<br> Ag
    15·1 answer
  • A tiny pencil mark just visible to the naked eye contains about 3 × 1017 atoms of carbon. what is the mass of this pencil mark i
    7·1 answer
  • Calculate the amount of carbon dioxid gas in 1.505x10^23 molecules of the gas.
    13·1 answer
  • The density of a material is a/n
    9·1 answer
  • Neutrons released in a fission reaction can strike other nuclei and cause
    14·1 answer
  • Using the periodic table, complete the table to describe each atom. Type in<br> your answers.
    6·1 answer
  • Which step do you use first to calculate the number of grams of FeCl2 produced when
    8·1 answer
  • Help me out here please?
    5·1 answer
  • WILL GIVE BRAINLIEST!!!
    8·1 answer
  • I need help with this asap..<br> 1. What has shininess<br> 2.ability to change its shape
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!