Units/Sig figs
Meters to Nanometers
1 m is 1*109 nanometers
What type of matter is Coffee
Homogeneous Mixture
5.23 meters to millimeters
5.23 x 103 mm
Data the contains numbers and units. Example 5.32 g.
Quantitative
How many protons are in sodium
11 protons
Multiplication/Division Rules
The number of Sig Figs is equal to the least certain measurement used
What kind of matter is limestone
Coumpound
0.0357 deciliters to kiloliters
3.57x10-6 kl
The isotope of I with a mass number of 131
13153I
What is the difference between Precision and Accuracy?
Precision is how close together your answers are
Accuracy is how close your answer is to the correct number
Microliters to Kiloliters
1 microliter is 1x10-9 Kiloliters
What kind of matter has a Constant composition that cannot be separated by physical methods.
A Pure Substance
13.87 inches to meters
(2.54 cm in 1 in)
0.3522 meters
How many Protons and Electrons are in N-3
10 electrons
7 protons
Addition/ Subtraction Sig Fig rules
The number with the least amount of places after the decimal is what is used
Do exact values count for Sig Figs
No
What is the definition of a chemical property change
These involve a change in the chemical composition, like an acid-base reaction
2.74 millimeters2 to decimeters2
0.000274 dm2
Rutherford designed an experiment that had particles hit a thin gold foil. What did this experiment help prove?
Protons are in the nucleus and are centrally located in the atom
What did the Cathode ray experiment prove?
The exsistence of negativly charges electrons
What are the rules for zeros in Sig Figs
Trailing zeros count if there is a decimal
(2500. = 4 Sig figs)
Embedded zeros always count
(12073= 5 Sig figs)
Zeros before the first non-zero do not count
(0.000002= 1 Sig fig)
What is the definition of a physical property change
It can be measured non-destructively with no change in chemical composition. (ice melting)
-273 °C to Kelvin and Fahrenheit
K= C+273
F= 180(C) + 32
0 kelvin
-459 Fahrenheit
What are the three subatomic perticles and their associated charges
Electron- Negative
Nuetron - Neutral
Proton- Positive
Convert 8.27 angstroms to millimeters. Note: 1 x 1010 angstroms equal 1 m)
8.27 x10-7 mm