What is that?
Formulas
Scientific Notation
Sig Figs
Prefixes
100
What is Chemistry?
Branch of science that deals with the composition, structure, and properties of matter-- as well as the changes it undergoes.
100
What is the formula to find density (p:lowercase Greek letter "rho")?
p=m/v
100
Express in scientific notation
0.000 004
4x10^-6
100
How many sig figs?
10,240
4
100
How many milligrams are in a gram?
1000 milligrams in a gram.
200
List the five major branches of Chemistry.
Physical Chemistry, Organic Chemistry, Inorganic Chemistry, Biochemistry, Analytical Chemistry
200
Calculate the density of an object with a volume of 24.0cm^3 and a mass of 42.0g.
p=m/v
42.0g/24.0cm^3 = 1.75 g/cm^3
200
Express in scientific notation
65536
(Don't round)
6.5536 x 10^4
200
How many sig figs?
200
1
200
What is the symbol for micro?
300
Explain the difference between precision and accuracy.
Accuracy - how close the measurement is to the actual value
precision - the consistency of measurements.
300
Temperatures on the surface of Venus may exceed 750. K, even at night. What is this temperature on the Celsius scale? (Answer in correct Sig figs for +100 points)
Tc = Tk - 273.15
= 750. - 273.15
= 476.85 *C (3 sig figs is the least)
= 477*C
300
Convert from scientific notation.
7.24 x 10^-2
.0724
300
How many sig figs?
0.000 009
1
300
What is the power of 10 for atto?
10^-18
400
What is system of measurement?
Collection of compatible, related units that can be used to measure various quantities.
400
What is 750. K in Degrees Fahrenheit? (DOUBLE points for correct sig figs)
Tc = Tk - 273.15 = 750. - 273.15
= 476.85 *C
Tf = 9/5 Tc +32 = 9/5 (476.85) +32 = 890.33*F
Sig figs (3) = 890*F
400
Perform the following calculation
(1.587 x 10^-4)-(1.6x10^-6)
1.571x10^-4
400
Perform these calculations using sig figs properly.
2588 +12.35
2600
400
What does "M" stand for?
mega
500
What is the difference between mass and weight?
Mass- how much matter in an object
Weight- force of gravity on an object
500
The density of copper is 8.92 g/cm^3.If it has a volume of 25.0cm^3, what is the mass (g)?
(v)p=m/v(v)
m=p(v)
8.92(25) = 223 g
500
Scientific notation is based on the fact that.....
Every number can be expressed as a number between 1 and 10 multiplied by a power of 10.
500
Perform calculation, using sig figs properly
3.436 / 1.28
3.436 / 1.28 = 2.68
500
How many milligrams are in a kilogram?
1,000,000 (one million) milligrams in a kilogram