Exam 1
The freezing and boiling points of water can be used to calibrate thermometers.
What are these respective temperatures in degree Celsius?
0, 100
Explain decomposition, synthesis, replacement, and combustion reactions
1 to 2, 2 to 1, replace one element of a molecule, O2 and organic molecule on left with water on the right
How many valence electrons do Li, C, O, and N have?
1, 4, 6, 5
Name a halogen, alkaline earth metal, and a noble gas
Group 7A, Group 2A, and Group 8A
What does PLTL stand for?
Peer-Led Team Learning
How many significant figures should be reported for the following calculation answer?
(2.12 × 5.2)/(9.21-2.8)
2
Balance the following equation:
NaCl(s) + H2SO4(aq) -> HCl (aq) + Na2SO4(aq)
2 + 1 -> 2 + 1
What are the quantum numbers of carbon
n = 2, l = 1, ml = -1, 0, +1, ms = +1/2
Which element has the largest electron affinity?
Cl, Br, I, or O
Chlorine
Where were office hours held?
Rm 112
In nomenclature, which combination uses roman numerals, and which uses prefixes?
Roman: (Transition Metal)(Non-Metal)
Prefixes: (Non-Metal)(Non-Metal)
Name the strong acids
hydrochloric, hydrobromic, hydroiodic, nitric, sulfuric, chloric, and perchloric acid
What is the electron configuration of Chlorine?
[Ne] 3s23p5
1s22s22p63s23p5
What is the Lewis Dot structure for Nitric Acid and what are the formal charges of N and O.
+1 and -1
Where is the Learning Center located?
In front of the science building
What is the atomic number, mass number, number of electrons, and number of neutrons in this atom?
13, 27, 10, and 14
Balance the following double replacement reaction:
_AgNO3(aq) + _AlCl3(aq) ->
3AgNO3(aq) + 1AlCl3(aq) -> 3AgCl (s) + 1Al(NO3)3(aq)
A 2.0 g sample is heated to 98.7°C and placed into a calorimeter containing 72.4 g of water at 23.60°C.
The final temperature in the calorimeter was 32.40°C.
What is the specific heat of the mineral?
Hint: Specific Heat of water is 4.184 J/gC
20.1 J/gC
If the formal charge on the central atom of the sulfate ion is zero (6 - 6 = 0), how many resonance structures can be made?
Hint: Sulfur is in Group 6 so it will have 6 bonds - two of them will be double bonds.
6
What is your section number?
09
An element has a density of {x} g/cm3.
What is the mass (in grams) of a block of that element that measures 5.60 cm X 0.900 cm X 2.35 cm?
Round off to 3 significant figures.
{X}*11.844
In a titration, a 25.00 mL (VA) sample of HCl required {x} mL (VB) of a 0.7971 M (MB) NaOH solution to reach the endpoint.
Calculate concentration of HCl. (M=mol/L; mol=MxV)
HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)
Because this is 1:1 mol ratio, you can use MAVA=MBVB; solve for MA
Answer to 4 sig figs (0. ___ ___ ___ ___ ).
Include unit, M
x0.03188
What minimum volume of chlorine gas at 298 K and 225 mm Hg is required to completely react with 2.44 g (26.98 g/mol) of aluminum according to the ideal gas law?
11.2 L
What are the electron domains of AX3 and AX2E2?
Hint: E1 is a lone pair.
Trigonal Planar and Tetrahedral
What are our names?
Lorissa, Patricia, and Emiliano