General Knowledge
Define physical and chemical properties. Examples?
Physical - characteristics that do not change the identity of the substance (color, shape, density, mp/bp)
Chemical - ability of a substance (flammability, acidity, reactivity)
What the rules for sig figs are and why do we use them?
Addition/Subtraction: smallest decimal place
Multiplication/Division: least # of sig figs
Used to measure precision
Convert 252.0oz to L
177.441
How do we calculate # of protons? Neutrons? Electrons?
Protons/Electrons are the same as the atomic number (cancel out).
Electrons = Mass # - Atomic #
Calculate 5.100 + 4.849, include sig figs
9.949
Exact vs Measured numbers
Exact- counting #s
Measured- length, mass, volume, use of ruler
How many Sig figs is in 150.40?
5
Convert 1.7 hours to seconds, use scientific notation.
6.12 x 103 seconds
What element is in group 5 period 4?
As
(4.32+790) x (56.000+1.0) in scientific notation4.
4.5x104
What is the ion for Be?
Be+2
Write 1390.7938 in scientific notation with 3 sig figs.
1.39 x 103
Convert 2km to nm
2x1012 nm
What is the Atomic #, AMU, # protons/electrons/neutrons in Br?
#35, AMU= 79.904, 35 protons, 35 electrons, 44.904 neutrons
A doctor orders 4.0 mg of morphine. The vial of morphine on hand is 38 mg/mL. How many L should you administer to the patient? with sig figs
0.0095 L
Define an isotope and how can we solve it like on the worksheet?
Check percentages add up to 100%, calculate isotope contribution to mass, XXXX
Write 0.0000346821 in scientific notation with 4 sig figs
3.468 x 10-5
If car drives 60 miles per hour for 2 hours. How many kilometers did he drive?
193.12 KM
Write the electron orbital diagram for O (oxygen)
6 valence electrons
If the brass is 46% zinc by mass and 54% copper, if there is a block that weighs 340 kg, what is the mass of zinc and copper in lbs? Include Sig Figs.
Zinc: 340 lbs
Copper: 400 lbs
Define Alpha, Beta, Gamma decay
Alpha - 42He, protons and neutrons decrease by 2, mass # decreases by 4
Beta - 01e positron, add proton, mass # is same
Gamma - no change
3 sig figs
The Empire State Building is recorded to be 1,454 ft. How many "Toyota Corolla" tall is the building? Note: One Toyota Corolla is 147.5 cm?
7.037 x 103 Toyota Corollas Tall
What is the full electron configuration of Br? Abbreviated?
1s22s22p63s23p64s23d104p5
[Ar] 3d104s24p5
A liquid allergy medication contains 18 mg of Cetirizine per 10 milliliters of solution. The recommended dosage is a maximum of 2.5 mg per kilogram of body weight per day. If a child weighs 25 pounds, how many liters of the allergy medication can the child take in one day?
15.75 mL, 0.01575 L