Significant Figures Famous Chemists In the Lab Common Mistakes UVA's Black Book

100

What is 2?
The number of significant figures in 0.030 m

100

What are molecules?
Although He is a smaller molecule than Ne, there are, according to Avogradro, just as many of these in a 1.0 L vessel if conditions are equal?

100

What is heat loss?
It is the most common error source associated with a styrofoam calorimeter.

100

What is 3?
The coefficient in front of chloride when writing an ionic equation for AlCl3

100

What is soil?
Geosmin is one of the compounds that gives this outdoor material its characteristic odor thanks to the filamentous bacteria that make it their home

200

What is 8.312 L*kPa/K/mole?
R with the correct number of significant figures 101.3*22.414/1.000/273.15

200

What is enthalpy?
Hess discovered that the pathway for a reaction does not affect the overall value of this quantity

200

What is 2?
It is the number of decimals that should be reported when using a standard 50.00 ml burette.

200

What is activation energy?
It's what's small in a reaction profile for a spontaneous process?

200

What are soap and water?
These 2 common bathroom materials can be used to wash off sarin, the poison used in the Iran-Iraq war and in Japanese subway attacks.

300

What is 1.43 g?(when only adding or subtracting, we go by the least number of decimal places)
The sum of 0.20 g and 1.23 g with the correct number of significant figures.

300

What is temperature?
Boyle's Law, P1Vi=P2V2 only applies if the ideal gas' number of moles and this other measurement are constant.

300

What is a titration or neutralization?
It's how the concentration of an acid can be obtained in the lab without using pH.

300

What is surface area?
The rate factor that causes twigs to burn faster than an equal mass of logs.

300

What is caffeine?
Guanine, the DNA base, is chemically related to this common breakfast molecule

400

What is 5 +/-1? ( only 20% error, as opposed to 33%)
Between 0.0003 +/- 0.0001 and 5 +/-1, the measurement that is more accurate?

400

Who is Lavoisier?
This man who was eventually guillotined was the father of modern chemistry

400

What is "balance the pressure"?
Aside from cooling, what needs to be done before recording the volume of hydrogen from a gas burette.

400

What is 1.5?
DAILY DOUBLE (bet to up as much as you have)How much faster two halves of a sphere react compare to an intact one?

400

What is hydrogen?
5.8 X 10-22 seconds elapse when light travels across the diameter of this nucleus

500

What is 1?
The number of decimals that a typical high school thermometer can be read to?

500

What is hydrogen bonding?
It is the type of bonding that Crick and Watson realized attracted adenine to thymine and guanine to cytosine in DNA.

500

What is oxygen?
The atmospheric percentage of this gas can be obtained by inverting a test tube with acidified iron in water.

500

What is spoils faster?
What happens to wine if an opened bottle is placed on its side.

500

What is aspirin (acetylsalicylic acid)?
DAILY DOUBLE (bet to up as much as you have)This common drug inhibits a COX enzyme, preventing the formation of prostaglandins, reducing inflammation but also removing the stomach's protection against acid.

LHA Chemistry 2

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