Q: Why can you never trust atoms?
Size isn't everything but in chemistry, a scientist must be as accurate and as precise as possible when measuring reagents, objects, or chemicals. This chapter is all about measuring and manipulating the measurements so that we get accurate and precise answers. Lots of math! But the great thing about math and chemistry is that you can always be certain of the 'right' answer if you follow the rules of chemistry.
So pay close attention to the units: how to manipulate the units and the rules for significant figures.
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| Example 1 for a Density Problem |
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| Example 2 for a Density Problem |
When working density problems, please make sure you write down all pertinent information from the original problem. If you need to convert units, write down the conversion factor to be used and show your work. Write the density equation and then substitute the values where appropriate and solve the problem. Make sure your answer has the correct number of significant figures.
Chemistry Worksheet 1
interactive density problems
More density problems
Memorize!
Interesting and Helpful Links
More info on units and conversions - At the bottom of the page, you can click on practice pages. The more problems you do the easier the equations become.
Sites to practice Conversion problems online
Metric units and conversions - online quiz
Mr. Carman's SI conversion online quiz
Another unit conversion quiz
A: They make up everything!
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