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Measurement
Safety
Chemical reactions
Elements and the Periodic Table
Compounds and Mxtures
100
What is an uncertain digit?
It's a 5 that indicates human or instrument error
100
What is a MSDS sheet?
Chemical safety sheet required to be on hand
100
The LHS of a chemical equation shows the compound(s) that is/are
the reactants
100
What element has the symbol Na?
Sodium
100
What is another name for ionic compounds?
electrolytes
200
How many sig. figs. in this number? .002357600
7
200
What does a red 4 on an NFPA label on a chemical bottle mean?
Extremely high flammability
200
The grams of the reactants and the products should be
The same
200
What element has the symbol Fe?
Iron
200
A compound is two or more types of atoms bonded in proportion with a
formula
300
How many sig. figs. in this number? 275030000
5
300
What is BSL-2 mean in terms of equipment in the chemistry lab?
Goggles, gloves and aprons
300
The coefficients in the equation represent the number of
moles or elements or compounds
300
Where are nonmetals on the Periodic table that together form molecules with covalent bonding?
In a triangle on the far RHS
300
Well mixed mixtures are called
Solutions
400
Put this number into scientific notation: 6743.000
6.743000 x 10 (positive 3 power)
400
What does a white CORR mean on a stock bottle of acid?
Corrosive
400
What are four indications of a chemical change?
Heat and light Precipitate Color change Bubbles
400
How do you determine the number of protons , electrons and neutrons in C? atomic number =6 mass number = 12
atomic number = 6 = 6 protons = 6 electrons; mass number - atomic number (12-6) = 6 neutrons
400
A compound with covalent bonds between nonmetals is known as a
Molecule
500
Put this number into scientific notation: .00046521
4.6521 x 10 (negative 4 power)
500
If an acid spills in the lab, how do you clean it up?
Neutralize with a base and then wipe up with paper towels.
500
How do we balance chemical equations?
Use the Box method
500
What are the most common elements in the human body?
C, N, O, P, S
500
Salt and water is a mixture between two
compounds