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Questions and Answers
Which technique is commonly used to solve chemistry problems and convert units?
What is the purpose of using dimensional analysis?
What is the result of multiplying a number by 1?
Which of the following is the correct conversion factor for converting hours to minutes?
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Which of the following is the correct conversion factor for converting miles to centimeters?
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Which of the following is the correct conversion factor for converting feet to inches?
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Which conversion factor would you use to convert grams to kilograms?
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What is the correct conversion factor to convert milliliters to liters?
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What is the final answer when converting 0.8 g/mL to kg/L?
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What is the correct order of operations when converting units?
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Study Notes
Chemistry Problem-Solving Techniques
- Dimensional analysis is the technique commonly used to solve chemistry problems and convert units.
- It helps ensure that equations are dimensionally consistent and aids in converting from one unit to another effectively.
Purpose of Dimensional Analysis
- The primary purpose is to verify that equations are properly set up and to convert measurements into desired units without losing accuracy.
Multiplying by One
- Multiplying a number by 1 results in the original number, as this operation does not change the value.
Conversion Factors
- Correct conversion factor for converting hours to minutes: 60 minutes = 1 hour.
- Correct conversion factor for converting miles to centimeters: 1 mile = 160,934.4 centimeters.
- Correct conversion factor for converting feet to inches: 1 foot = 12 inches.
- Conversion factor for converting grams to kilograms: 1,000 grams = 1 kilogram.
- Correct conversion factor to convert milliliters to liters: 1,000 milliliters = 1 liter.
Conversion Example
- Converting 0.8 g/mL to kg/L: The final answer is 800 kg/L, obtained by multiplying by 1,000 (since 1 g/mL equals 1,000 kg/L).
Order of Operations for Unit Conversion
- The order involves identifying the units to convert, applying the correct conversion factors sequentially, and ensuring dimensional consistency throughout the calculation.
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Description
Test your understanding of dimensional analysis and the factor-label method with this quiz. Solve a variety of chemistry problems, including calculating the number of minutes in a given number of hours.
