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
Misha Larkins [42]
2 years ago
9

The half-life of cesium-137 is 30 years. Suppose we have a 150 mg sample. (a) Find the mass (in mg) that remains after t years.

Chemistry
1 answer:
11Alexandr11 [23.1K]2 years ago
4 0

The half-life of cesium-137 is 30 years. Suppose we have a 150 mg sample. The masses (in mg) that remains after t years A=150/2^t/30yrs

<h3>what do you mean by half-life?</h3>

A substance's half-life is the amount of time it takes for half of it to decompose.

<h3>What is a half-life example?</h3>

Half-life is the length of time it takes for half of an unstable nucleus to go through its decay process. A radioactive element's half-life decay time varies depending on the element. For instance, carbon-10 has a half-life of only 19 seconds, making it impossible to discover in nature. On the other hand, uranium-233 has a half-life of almost 160000 years.

When n half-lives have passed, the formula for estimating the amount still left is:-

A=A°/2^n

where,

A=initial amount

A°=remaining amount

n=t/t_{1/2}

A=150/2^t/30yrs

Learn more about half-life here:-

brainly.com/question/28001741

#SPJ1

You might be interested in
Is this an example of decomposition<br> 2CH4 + 402 → 2C02 + 4H2O
Molodets [167]

Answer:

Identify each equation as a composition reaction, a decomposition reaction, or neither.

Fe2O3 + 3 SO3 → Fe2(SO4)3

NaCl + AgNO3 → AgCl + NaNO3

(NH4)2Cr2O7 → Cr2O3 + 4 H2O + N2

Solution

In this equation, two substances combine to make a single substance. This is a composition reaction.

Two different substances react to make two new substances. This does not fit the definition of either a composition reaction or a decomposition reaction, so it is neither. In fact, you may recognize this as a double-replacement reaction.

A single substance reacts to make multiple substances. This is a decomposition reaction.

Test Yourself

Identify the equation as a composition reaction, a decomposition reaction, or neither.

C3H8 → C3H4 + 2 H2

Explanation:

I hope I help :)))

5 0
3 years ago
What effect does nuclear radiation have on atoms
Diano4ka-milaya [45]

it is C it splits atoms

7 0
3 years ago
Read 2 more answers
Rubidium is in Group I of the Periodic Table and bromine is in Group VII.
tensa zangetsu [6.8K]
The answer to this question would be C
7 0
3 years ago
2
Zepler [3.9K]

Answer:

Three product with are SO2, H2O and CuSO4

Explanation:

6 0
3 years ago
In which of the following sets are the charges given correctly for all the
Ronch [10]

Answer:

B) K⁺, Sr²⁺ , O²⁻

Explanation:

Potassium is present in group one. It is alkali metal and have one valance electron.Potassium need to lose its one valance electron and form cation to get complete octet.

That's why it shows K⁺.

Sr is alkaline earth metal. It is present in group two. It has two valance electrons. Strontium needed to lose its two valance electrons and get stable electronic configuration.

When it loses its two valance electrons it shows cation with charge of +2.

Sr²⁺

Oxygen is present in group 16. It has sex valance electrons. It needed two more electrons to complete the octet. That's why oxygen gain two electron and form anion with a charge of -2.

O²⁻

3 0
3 years ago
Other questions:
  • What is a percent volume of ethanol c2h60 in the final solution when 85 ml of it is diluted to a volume?
    8·1 answer
  • What is the physical state of a straight-chain hydrocarbon containing three carbon atoms at room temperature?
    6·2 answers
  • A sample of glucose ( C6H12O6 ) of mass 8.44 grams is dissolved in 2.11 kg water. What is the freezing point of this solution? T
    8·1 answer
  • A volume of 30.0 mL of a 0.140 M HNO3 solution is titrated with 0.570 M KOH. Calculate the volume of KOH required to reach the e
    5·1 answer
  • What is the GCF of 18 and 30
    10·2 answers
  • Jacob takes 7 classes, each 50.00 minutes long every day for the 5 day school week. How many hours per week does he spend in cla
    15·1 answer
  • Magnesium phosphate formula
    10·1 answer
  • What is the identity of the element whose isotopes you have selected
    12·1 answer
  • I need help, please answer
    9·2 answers
  • Free points lol happy April fools day
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!