Safety
Approved eye protection devices (such as goggles) are worn in the lab
any time chemicals, heat, or glassware are used
Which given unit is the largest
a. Kilogram
b. Milligram
c. Decagram
d. Centigram
Kilogram
What is the molar mass of CO2?
What number do we use to calculate the number of particles in a substance?
Avogadro's number
Which of the following is an element
a. salt
b. caron monoxide
c. ammonia
d. silicon
d. Silicon
after completing an experiment, all chemical waste should be
disposed of according to your teachers directions
Convert 137, 000, 000 to scientific notation.
1.37 x 10^7
Atoms that lose electrons become
Positive ions
According to Boyl's Law of Pressure and Volume; at constant temp, as the pressure of a given sample of gas is increased, the volume will
decrease
pH is the measure of the concentration of
H+ ions
Long hair in the lab
tied back, or kept entirely out of the way with a hair band.
How many Significant numbers are present in the number 479?
3
How many valence electrons does boron (B) have?
3
Mole ratios are obtained from
A balanced chemical equation
What type of reaction is H2O2->H2+O2
Decomposition
Horseplay or practical jokes in the lab are
always against the rules.
One mole is equal to.
a. 6.02 x 10^23
b. Molar mass
c. 22.4 L t STP
d. all of these
d. All
What is the name of CaCl2
Calcium Chloride
Gases have
No definite shape nor volume
Isotopes have the same
Atomic Number
True/False: Hot glass looks the same as cold glass
True
What is the Molar Mass of (NH4)3PO4
a. 113.02 g/molb. 149.12 g/mol
Which of the following is not an electron orbital?
E-orbital
The starting materials in a chemical reaction
reactants
Neutrons have a _____ charge and found ______
Neutral, in the Nucleus.