Half-Life Problem Solving Techniques

The video tutorial explains how to solve a half-life problem using a chart. It begins by setting up the problem with initial conditions, then fills in the chart with known values. The half-life is calculated by dividing the total time by the number of half-lives. The solution is verified by completing the chart, ensuring the calculations are correct. The tutorial concludes with a summary of the process.

What is the first step in solving a half-life problem using a chart?

• Ignore the initial amount

• Start with the final amount

• Begin with zero half-lives and zero time

• Calculate the half-life immediately

If you start with 36 grams and end with 2.25 grams after 72 hours, what should you do next?

• Find the half-life directly

• Calculate the number of half-lives

• Double the initial amount

• Ignore the time given

How much of the substance is left after one half-life if you start with 36 grams?

• 36 grams

• 4.5 grams

• 18 grams

• 9 grams

What is the amount left after three half-lives if you start with 36 grams?

• 18 grams

• 9 grams

• 4.5 grams

• 2.25 grams

How do you calculate the half-life if you know the total time and number of half-lives?

• Divide the total time by the number of half-lives

• Add the total time to the number of half-lives

• Subtract the number of half-lives from the total time

• Multiply the total time by the number of half-lives

What is the half-life of the material if it takes 72 hours for four half-lives?

• 24 hours

• 12 hours

• 36 hours

• 18 hours

What is the purpose of dividing the total time by the number of half-lives?

• To ignore the time given

• To find the initial amount

• To determine the half-life

• To calculate the final amount

Why is it important to verify the solution by completing the chart?

• To ignore the final amount

• To find a different half-life

• To ensure the calculations are correct

• To change the initial amount

What should the chart look like at the end of the problem?

• Different from other problems

• The same as any other problem

• With errors

• Incomplete

What is the final step in solving a half-life problem?

• Change the half-life

• Ignore the final amount

• Verify the solution and ensure the chart is complete

• Recalculate the initial amount