Lab Stuff
Which apparatus is used to determine the mass of an object?
balance
I proved a relationship between energy and mass.
Einstein
What is the correct area of the following measurements?
.50 m X 4.25 m X 6.000 m
13m3
What is the study of the relationship between the structure and properties of matter and the use of this knowledge to produce new materials?
chemistry
What type of reaction is the following?
2NaCl → 2Na + Cl₂
decomposition
What should be found in the miscellaneous drawer?
test tube brush
I discovered radioactivity
Curie
2.3 km is equal to ____ m
2300 m
What is an atom that has an electrical charge is called?
ion
What is the calculated amount of product that should be produced in a chemical reaction?
theoretical yield
What apparatus should be used to measure volume?
a graduated cylinder, NOT a beaker
I discovered the positive nucleus
Rutherford
How many oxygen atoms are in Al2(SO4)3?
12
What is the unit that is used to represent the chemical quantity of a substance as a number of particles?
mole
Which of the following chemical equations represents oxidation-reduction reactions?
1) Zn (s) + CuSO₄ (aq) → ZnSO₄ (aq) + Cu (s)
2) SrO (s) + H₂O (l) → Sr(OH)₂ (aq)
3) AgNO₃ (aq) + NaI (aq) → AgI (s) + NaNO₃(aq)
1 and 2
When measuring the volume of water, always read from ___
the bottom of the meniscus.
I found the charge on the electron.
Millikan
What is the approximate atomic mass of an isotope of lithium that has 3 electrons, 3 protons, and 5 neutrons?
8 amus
What is the ratio of actual amount of product to the amount of product in a calculated chemical reaction is called?
percent yield
When should goggles be worn?
Glassware, chemicals, Ms. King says
What is the density of pure water?
1 g/mL
I discovered the proton
Thomson
Silver has an atomic mass of 107.9 amu. If 51.84% of Ag exists as Ag-107 (106.9051 amu), what is the atomic mass of the other isotope?
109ish
What is a crystalline substance that contains water molecules in a definite ratio with each formula unit?
hydrate
What is the balanced equation for the complete combustion of benzene?
2 C6H6 (l) + 15 O2 (g) → 12 CO2 (g) + 6 H2O (g)