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
lapo4ka [179]
3 years ago
14

What is a half-life of an isotope? please help

Chemistry
1 answer:
N76 [4]3 years ago
3 0

Answer:

Explanation:

Hello! Hope this helps!

One important measure of the rate at which a radioactive substance decays is called half-life, or t1/2. Half-life is the amount of time needed for one half of a given quantity of a substance to decay. Half-lives as short as 10–6 second and as long as 109 years are common.

You might be interested in
Scientific notation is
Murrr4er [49]

Answer:

Scientific notation is a system in which quantities are too big or too tiny to compose in decimal form.

Key words:

1: Scientific

2: Quantities

3: Decimal

Please mark brainliest

<em><u>Hope this helps.</u></em>

8 0
3 years ago
Be sure to answer all parts. this is a two-part question. first, draw the minor alkene product that should be formed in the reac
kotykmax [81]

Answer:

See explanation below

Explanation:

The question is incomplete, however, I found a question very similar to this, and I'm assuming this is the question you are asking to answer. If it's not, please tell me which one it is. Here's a tip for you to get an idea of how to solve.

Picture 1, would be the original question. Picture 2 is the answer of it.

Now, This is a E1 reaction where this type of reactions are taking place in two steps. The first step is the formation of the carbon cation, this step is always slow. The secon step is the addition of a nucleophyle, or, in this case, formation of a pi bond, and we get a alkene.

Hope this can help you

8 0
3 years ago
Show your work with good use of units, rounding, and significant figures. [Hint: it is good practice to show the value of your a
mel-nik [20]

Heat required : 4.8 kJ

<h3>Further explanation </h3>

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

The heat needed to raise the temperature

Q = m . c . Δt

1. heat to raise temperature from -20 °C to 0 °C

\tt Q=10\times 2.09\times (0-(-20)=418~J

2. phase change(ice to water)

\tt Q=10\times 333=3330~J

3. heat to raise temperature from 0 °C to 25 °C

\tt Q=10\times 4.18\times (25-0)=1045~J

\tt Q~tot=418+3330+1045=4793~J\rightarrow rounding~and~2~sig~figs=4.8~kJ

3 0
2 years ago
The smell of hot food moves faster than the smell of cold food. Which property of gas is responsible for this?
zhenek [66]
The answer would be kinetic energy. :)
4 0
3 years ago
Read 2 more answers
Why is aspirin sometimes buffered? Will give brainliest.
Mademuasel [1]

Answer:  the aspirin also contains a buffering agent—usually MgO—that regulates the acidity of the aspirin to minimize its acidic side effects.

Explanation:

8 0
2 years ago
Other questions:
  • What is the total number of orbitals found in the second energy level? openstudy?
    12·2 answers
  • What is the volume of 21.0 g of nitrogen gas at stp?
    15·1 answer
  • Early childhood teachers often partner with colleagues to A. share duties. B. build a trustworthy friendship. C. plan a curricul
    14·2 answers
  • Which part of the atom is directly involved in chemical changes? A. the electron B. the energy levels C. the nucleus D. the char
    14·1 answer
  • The atomic number is the number of protons in the atom of the element
    10·1 answer
  • What mineral is not a structural component of bone?
    13·1 answer
  • Which of these molecules has an overall dipole moment? O A. F2 B. H2S C. CH4 D. CO2​
    9·1 answer
  • Joaquin's doctor tested Joaquin's reflexes by tapping his knee. The doctor
    12·1 answer
  • ✨Please help!! ✨. CONVECTION
    7·2 answers
  • Substance
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!