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# Chemistry Chp. 3

### Chapter 3

How would you write 520,000,000 in scientific notation? 5.2 X 10^8
What is accuracy? How close a measurement comes to the actual value of whatever is measured.
What is the difference between the accepted value and the experimental value? accepted value is the correct value based on reliable sources and the experimental value is the value measured in lab.
What is the equation to find error? Error= experimental value - accepted value
What is the equation for the percent error? (|error|/accepted value) x 100%
Round .490870 to the second significant figure. .49
How many significant figures are in the following? A. 123 B. 9.8000 X 10^4 C. 40.007 A. 3 B. 5 C. 5
What is the SI unit for length? meter
What is the SI unit for mass? kilogram
What is the SI unit for temperature? Kelvin
what is 20 degrees C in Kelvin? 20 + 273 = 293
743 mm equals how many meters? .743
35 meters equals how many centimeters? 3500
1.5 Kilometers equals how many meters? 1500
1 kilometer equals how many pounds? 2.2
2 hours equals how many seconds? 7200
2.5 years equals how many minutes? 1314000
1.45 kilometers equals how many millimeters? 1,450,000
Every student needs 245 g of NaCl to an experiment. There are 10 kilograms of NaCl, how many students can do the experiment? 40
What is the formula for density? mass/volume
If an object has a mass of 152 g and it's volume is 12.3 cm^3, what is it's density? 12.4 g/cm^3
if an object has the density of 23.3 g/cm^3 and a mass of 2.1 kilograms, what is the volume? 90.1 cm^3
Created by: phersont