Classify the following samples of matter
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Cough syrup that must be shaken before ingested
Freshly squeezed orange juice
Blueberry muffin
Benzene, C6H6
Nail polish remover, C3H6O
A muddy pond
A sample of rocks, grass and metal
A glass of Grape kool­aid Jan 18­7:57 PM
In Raiders of the Lost Ark, Indiana Jones tried to remove a gold idol from a booby­trapped pedestal. He replaces the idol with a bag of sand. If the idol has a mass of 2.00 kg, how many liters of sand must he place on the pedestal to keep the mass sensitive booby­trap from activating? (Density of sand is 3.00 g/cm3)
Jan 19­6:48 PM
How many sig figs in the following values?
a) 75.02mm
b) 0.0049 g
Calculate the average atomic mass of sulfur if 95.00% of all sulfur atoms have a mass of 31.972 amu, 0.76% has a mass of 32.971amu and 4.22% have a mass of 33.967amu.
Jan 19­6:47 PM
A helium laser emits light with a wavelength of 633 nm. What is the frequency of the light? Jan 19­7:01 PM
Perform the following operations and give answer with the correct number of sig figs. a) 0.0677 + 48.1 + 82.7655
c) 18.90 mL d) 150 cm
e) 12 test tubes
Jan 19­7:05 PM
Jan 19­7:09 PM
b) 0.0222 x 8.702
What is the mass of 250.0 mL of benzene? The density of benzene is 0.8786 g/mL.
Jan 19­7:21 PM
You find 13,406,190 pennies. If each penny weighs 4 grams, how much did all that loot weigh in pounds? Round to the nearest pound. (2.2 lbs = 1 Kilogram) Jan 18­7:43 PM
Be sure to review...
*Scientific method
*Physical and chemical properties
*Classifying matter (heterogeneous/homogeneous)/Pure substances
*Calculations­sig figs, metric prefixes/conversions, dimensional analysis, density
*Scientists­Thomson, Rutherford, Bohr, Dalton, Schrodinger
*Periodic table, Mendeleev, atomic number, subatomic particles
*Isotopes, average atomic mass, calculations
*Emission spectra, calculations involving wavelength, frequency, energy
*Why we see colors we do in flame tests
*Electron configurations
*Periodic trends, size, electronegativity
*Chemical bonds/compounds­ionic, covalent, metallic
*Formula writing, naming (all we have covered so far)
Jan 19­11:16 AM
Jan 19­2:54 PM