Textbook Question
How many significant figures are there in each of the following values?
0.07 x 108
456
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1. Intro to Physics Units
Counting Significant Figures
5:35 minutesProblem 23
Textbook Question
You are using water to dilute small amounts of chemicals in the laboratory, drop by drop. How many drops of water are in a 1.0-L bottle?
Verified step by step guidance1
Understand the problem: We need to find out how many drops of water are in a 1.0-L bottle. This requires knowing the volume of a single drop of water.
Research or recall that the average volume of a drop of water is approximately 0.05 mL. This is a common approximation used in laboratory settings.
Convert the volume of the bottle from liters to milliliters, since the drop volume is given in milliliters. Use the conversion: 1 liter = 1000 milliliters.
Set up the calculation to find the number of drops: Divide the total volume of the bottle in milliliters by the volume of one drop. This can be expressed as:
Perform the division to find the number of drops. This will give you the total number of drops in the 1.0-L bottle.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Volume Measurement
Volume measurement is the determination of the amount of space occupied by a substance, typically expressed in liters or milliliters for liquids. Understanding how to convert between these units is crucial for calculating the number of drops in a given volume, as 1 liter equals 1000 milliliters.
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Drop Volume
Drop volume refers to the average volume of a single drop of liquid, which can vary based on factors like the dropper used and the liquid's properties. For water, a typical drop is approximately 0.05 milliliters, which is essential for estimating the number of drops in a larger volume.
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Unit Conversion
Unit conversion involves changing measurements from one unit to another, such as converting liters to milliliters. This concept is vital for calculating the number of drops in a liter, as it requires converting the total volume into smaller units that match the drop volume.
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