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
Many industrial reactions, like the reaction of nitrogen gas (N2) and hydrogen gas (H2) to produce ammonia for fertilizers, have
Jobisdone [24]
Catalysts always quicken the experiment
8 0
3 years ago
Write the skeleton equation: <br> Cobalt and Sulfur react to produce Cobalt (II) Sulfide
lidiya [134]

Answer:

Co + S = Co2S3

Explanation:

pretend = is the arrow

7 0
3 years ago
20<br> How do you solve this ?
Kaylis [27]

Answer:

eight oxygen atoms

Explanation:

This formula shows that in one mole of this compound, there are 3 moles of Ca atoms that combine with 2 moles of the PO4(phosphate) groups, which gives a total of 2 moles of P atoms and 8 moles of 0 atoms.

5 0
2 years ago
Determine the number of significant figures in the measurement quantity: 2600. kg.
xxMikexx [17]

Answer:

2600 kg has 4 significant figures

Explanation:

Any different number to zero is a significant figure

For example, 1.8 → 2 significant figures

When you  have 0 in the middle of two numbers, we consider it as a significant number

For example, 3.02 → 3 significant figures

When you have 0 on the left in the measure, we do not consider as a sgnificant figures

For example 0.0010 → 2 significant figures (10)

3.0 → 2 significant figures (0 is on the right, not the left)

7 0
3 years ago
choose any bases that will selectively deprotonate the above acid, that is, any bases that will favor the formation of products.
Zanzabum

In order to deprotonate an acid, we must remove protons in order to achieve a more stable conjugate base. For this example, we can use the relationship between carboxylic acid and hydroxide.

Deprotonation is the removal of a proton from a specific type of acid in reaction to its coming into contact with a strong base. The compound formed from this reaction is known as the conjugate base of that acid. The opposite process is also possible and is when a proton is added to a special kind of base. This is a process referred to as protonation, which forms the conjugate acid of that base.

For the example we have chosen to give, the conjugate base is the carboxylate salt. This would be the compound formed by the deprotonated carboxylic acid. The base in question was strong enough to deprotonate the acid due to the greater stability offered as a conjugated base.

To learn more visit:

brainly.com/question/5613072?referrer=searchResults

8 0
2 years ago
Other questions:
  • 4He 2
    14·1 answer
  • Help asap please ty :)
    10·1 answer
  • Hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer indu
    12·1 answer
  • How, exactly, would altering the pH in a solution affect a living organism and how do organisms prevent large pH fluctuations?
    14·1 answer
  • Fill in the blacks on the sheet
    15·1 answer
  • What is the molality of a solution containing 8.0 grams of solute in 0.50 kg of solvent?
    9·2 answers
  • Mendel discovered that:
    15·1 answer
  • V. = 22.4 L; P= 1 atm;<br> P, = ? atm; V, = 2.8 L
    14·1 answer
  • Analyze the following chemical combinations<br>a) MgO<br>b)CaCl2<br>c) Na2O​
    13·1 answer
  • Which statement is true about relative dating and radioactive dating?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!