All categories

2 years ago

If the half-life of a 20.0 g sample is known to be 24 minutes, how long will it take for only 5.0 grams of the sample to remain?

Chemistry

2 answers:

Degger [83]2 years ago

4 0

For a 20g sample it will take 24 minutes therefore for a 5g sample it will take 6 minutes

Katen [24]2 years ago

3 0

its will take 48 minutes

You might be interested in

What factors affect the rate of a chemical reaction?

Contact [7]

Answer:

The answer to your question is below

Explanation:

Factors that affect the rate of a chemical reaction

- Temperature If the temperature increases the rate of reaction increases.

- Concentration The reaction will move where there less concentration it could be to the reactants of products.

- Particle size The lower the particle size the higher the rate of reaction.

- Catalyst Catalyzers accelerate the rate of reaction

- Pressure The reaction will move where there are fewer molecules.

3 0

2 years ago

What is the electron configuration of the calcium ion?

Elanso [62]

[Ar] 4s²
Let me know if you want a step by step!
Hope that helps

4 0

2 years ago

Read 2 more answers

A system of ideas that explains many related observations and is supported by a large body of evidence collected through scienti

wlad13 [49]

B. Theory
The hypothesis that stand the test of time (often tested and never rejected) is called theory. A theory is supported by a great dealcof evidence.

6 0

2 years ago

The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the _____ and the nitrogen is the _____.

Flura [38]

Here are the answers that would best complete the given statement above. The air you breathe is made of 21% oxygen and 78% nitrogen. The oxygen in air is the SOLUTE and the nitrogen is the SOLVENT. In a given mixture, the reagent having the highest percentage of amount is always the solvent and the one or ones having the lower percentages are the solutes. Hope this answer helps.

6 0

2 years ago

What letter on the model titration curve corresponds to the point where ph equals the numerical value of pka for hpr? what speci

irakobra [83]

Letter C on the model titration curve corresponds to the point where pH equals the numerical value of pKa for HPr

<h3>What is a titration curve?</h3>

A titration curve is a graph of the pH of a solution against increasing volumes of an acid or a base that is added to the solution.

The pH of a solution is the negative logarithm to base ten of the hydrogen ion concentration and is a measure of the acidity or alkalinity of the solution.

The pKa is the acid dissociation constant of an acid solution.

In a titration of a strong acid and strong base, the pH at equivalence point is equal to the pKa of the acid.

The equivalence point is the point when equal moles of acids and base has reacted.

In the given titration curve, pH = pKa at point C.

In conclusion, for a titration curve of strong acid and base, at equivalence point, pH is equal to pKa of acid.

Learn more about equivalence point at: brainly.com/question/23502649

#SPJ1

4 0

1 year ago