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Hour Exam 1 Study Guide PPT Material Type: Notes; Professor: Whitteck; Class: General Chemistry I; Subject: Chemistry; University: University of Illinois - Urbana-Champaign; Term: Spring 2010;
Typology: Study notes
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If you need to sign up for the conflict exam please do soby 4pm TODAY outside 101 Chemistry Annex, the conflictexam will be held from 5:30-6:45 pm in 140 Burrell onThursday February 18
th.
You will receive the answers after the exam, therefore youwill be able to grade yourselves.
Scientific Method (know definitions) (1)
Quantitative versus Qualitative measurements (1)
Accuracy versus Precision (1)
Significant Figures (1)
Dimensional Analysis (multiple questions –
indirectly)
Density (1)
Classification of Matter (2)
(a)
(b)
(c)
(d)
(e)
what was covered in class is what I find important
cathode ray experiment and plumpudding model*
alpha-particle bombardment experiment*
Which of the following statements is FALSE? a)
An atom is mostly empty space. b)
Glucose (C
12
) is an example of a covalent compd. 6
c)
CaF
contains an alkali metal and a halogen. 2
d)
When a metal forms a compound with a nonmetal, anionic compound generally results. e)
Metals generally form stable cations
in ionic compounds.
and Limiting Reactant problems (6)
A binary compound between an unknown element E and hydrogen contains 91.27 % E and 8.73% H by mass. If the formula is E
, what is the identity of E? 8
A sample of LSD (D-lysergic acid diethylamide,C
24
O) is added to some table salt (sodium chloride) 3
to form a mixture. Given that a 1.00 g sample of the mixture undergoes combustion to produce 1.20 g ofcarbon dioxide, what is the mass % of LSD in the mixture?
How many of the following substances are strongelectrolytes?
Sr(OH)
, AgCl, Na 2
insoluble
insoluble
Exceptions: Salts of alkali metals and ammonium cations.
Consider the following information for the next three questions. 100.0 mL
of 0.
lead (II) nitrate is added
to 75.0 mL
of 0.
ammonium phosphate and a
precipitate forms.
What is the net ionic equation.
How many moles of precipitate are formed assuming^ 100% yield?
Calculate the molarity
of ammonium ions after the
precipitation is complete.
What volume of 0.
Ba(OH)
is required to react 2
completely with 14.20 mL
of 0.
? Phosphoric 4
acid contains three acidic hydrogens.
Law, Avogadro’s Law
There will be three theory type problems and three^ calculation problems concerning ideal gases
Which of the following statements is false concerning ideal gases?a) For a mixture of gases, the total pressure is the sum of
the partial pressures of all the gases present. b) At constant P and n, a plot of volume (L) vs.
temperature(K) is linear. c) At constant V and T, the moles of gas present is inversely
related to the pressure of the gas sample. d) At constant n and T, as the volume of a gas sample
increases, the pressure of the gas decreases. e) At constant P and T, a 2.0 L sample of N
(g) contains 2
twice the number of molecules as a 1.0 L sampleof O
(g). 2
