Chapter 1/2
Chapter 2
Chapter 3
Chapter 4/5
Chapter 6
100
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Which target represents accuracy? Precision?
The target on the left (1st target in row) is accurate, but not very precise. The target on the right is precise, but not very accurate.
100
Calculate the % mass of O in the following compound: C12H19NO3
22%
100
What is the photoelectric effect and who discovered it?
Electrically charged particles are released from or within a material when it absorbs electromagnetic radiation - Einstein
100
The number of pi bonds and sigma bonds for this illustration:
9 sigma bonds
2 pi bonds
100
The molarity of 0.2074 g of calcium hydroxide, Ca(OH)2, in 40.00 mL of solution
0.06998 M
200
What is the law of conservation of matter?
Matter cannot be created nor destroyed.
200
What did Rutherford's gold foil experiment lead to the discovery of?
The nucleus
200
A sodium streetlight gives off yellow light that has a wavelength of 589 nm (1 nm = 1 × 10−9 m). What is the frequency of this light?
5.09×1014 s−1
200
The hybridization of the two carbon atoms in acetic acid?
H3C, sp3
C(O)OH, sp2
200
The molecular formula for a yellow dye that has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol
C15H15N3
300
Give three examples of intensive properties and three examples of extensive properties.
Intensive:
color, boiling point, temperature, luster, hardness
Extensive:
volume, mass, size, weight, length
300
An element has 55 electrons and a +1 charge. Determine the symbol, protons, neutrons, and mass # of the element.
Symbol - Ba
Protons - 56
Neutrons - 81
Mass # - 137
300
Calculate energy, E, when n=2
-5.45 x 10-19 J
300
The limiting reactant when 2.00 g of Si and 1.50 g of N2 react in the following equation:
3Si(s)+2N2(g)⟶Si3N4(s)
Silicon (Si)
300
What volume of 1.59 M KOH is required to prepare 5.00 L of 0.100 M KOH?
0.314L
400
Is oil and vinegar salad dressing a heterogenous or homogenous mixture?
Heterogenous
400
If the mass of one isotope of nitrogen, nitrogen-14, is 14.003 amu and another isotope, nitrogen-15, is 15.000 amu, find the relative abundance of each isotope. The average mass of Nitrogen, from the Periodic Table, is 14.007 amu.
99.6% for nitrogen-14
0.4% for nitrogen-15.
400
Arrange the following in order of increasing atomic size: In, Al, B, Ti
B, Al, In, Ti
400
The Lewis Structure for Hexachlorocyclohexane (HCCH)
400
12.915 g of a biochemical substance containing only carbon, hydrogen, and oxygen was burned in an atmosphere of excess oxygen. Subsequent analysis of the gaseous result yielded 18.942 g carbon dioxide and 7.749 g of water. Determine the empirical formula of the substance.
CH2O
500
Which of the following is different in an isotope?
(A) Number of protons
(B) Number of electrons
(C) Number of neutrons
(D) Number of positrons
(C) Number of neutrons
500
How many molecules are there in a 0.500 g tablet of aspirin (C9H8O4)?
What is 1.67 x 1021 molecules
500
What is the wavelength when n=6 moves to n=2? Is this visible?
4.10 x 10-7 m
Visible!
500
The electron domain geometry and the molecular geometry for TeCl42−
EDG: octahedral
MG: square planar
500
It takes 38 mL of 0.75 M NaOH solution to completely neutralize 155 mL of Sulfuric Acid solution (H2SO4). What is the concentration of the H2SO4 solution?
0.094 M