Intro to Chem
2,700,000 in scientific notation.
2.7 x 10^6
A homogeneous mixture has how many phases of matter?
One
List the liquids in order of weakest to strongest intermolecular forces: ethanol, water, ethanoic acid, propanone
propanone, ethanol, water, ethanoic acid
Amorphous solids are (isotropic/anisotropic) in nature
isotropic
What is the abbreviated electron configuration of calcium?
The statement "The total mass of materials is not affected by a chemical change in those materials" is called a(n)...
observation / measurement / theory / natural law / experiment
Natural law
Which compound when stirred in water will not pass through filter paper?
NaCl, NH4S, Mg(OH)2, LiCl
Mg(OH)2
The melting point curve of water's triple point diagram has a (positive/negative) slope?
negative
True or false: Boiling is a surface phenomenon.
False, evaporation is a surface phenomenon.
As you move across a period, Zeff increases while shielding (increases/decreases/remains constant).
Constant
In a laboratory exercise to determine the volume of a mole of a gas at STP, a student determines the volume to be 2.25 liters greater than the accepted value. The percent error in the student's value is...
10.0%
In 200g of H2O, how many grams of NaNO3 will precipitate out of the solution if the temperature decreases from 40 to 10 degrees Celsius?
approximately 50g NaNO3
Order aqueous, solid, liquid, and gas in order of increasing entropy.
solid - liquid - aqueous - gas
There are ? types of crystal systems. There are ? types of unit cell.
7, 3
True or False: The Pauli Exclusion Principle states that there will be a maximum of 2 electrons per orbital and that the electrons will have opposite spins.
True
Convert 35 mi/hr into ft/sec
51 ft/sec
Increasing the temperature of a gas (increases/decreases) the rate of dissolving.
In gases, increasing the pressure (increases/decreases) the rate of dissolving.
decreases, increases
What effect does an increase in temperature have on viscosity?
Which of the following is not a network solid? C, SiC, SiO2, HCl
HCl
Ammonium phosphate 149 g/mol
Convert 0.0494ft^3 to L. (1 L = 1 dm^3)
1.40 L
Solubility and molecular polarity are two physical properties of a mixture required to use which separation technique?
Chromatography
How much heat is released when 8.50 grams of water at 150 degrees Celsius is cooled to ice at -22.0 degrees Celsius? Express your answer in kilojoules.
28.2 kilojoules
Solids with this property will become liquids after absorbing water from the atmosphere.
Deliquescence
Calculate the average atomic mass of silicon considering the following information: Silicon-28=92.23%=27.97693amu / Silicon-29=4.68%=28.97649amu / Silicon-30=3.09%=29.97377amu
28.1amu