Chem Final
Which of the following two atoms are isotopes
12 13 C and C 6 6
What is the sum of the coefficients when the following equation is balanced using the lowest whole numbered coefficients? 4 PH3(g) + 8O2(g) ➡️ 1 P4O10(s) + 6H2O(g)
19
A single sp3 orbital has...
2 lobes of unequal size
For a particular process that is carried out at constant pressure, q= 125 kj and w= -15 kj. Therefore... /\E= 125 kj + (-15 kj)= ?
/\E= 110 kj and /\H= 125 kj
For the reaction, 2 NH3(g) ➡️ N2(g) + 3 H2(g), one would expect...
/\H° to be positive and /\S° to be positive
A gas occupies 22.4 L at STP and 14.5 L at 100°C and 2.00 arm pressure. How many moles of gas did the system gain or lose?
0.05 moles lost
A::A represents
A double bond
In the reaction AgNO3(aq) + HI(aq) ➡️ AgI(s) + HNO3(aq) the spectator ions are
H+ and NO3-
Which is the most acceptable electron dot structure for N2H2?
H-Ñ=Ñ-H
Which of the following would be expected to have sp2 hybridization on atom A?
I, II, and III
Write the chemical formula for the following compounds: sodium hypochlorite, calcium sulfate, and strontium hydroxide
Sodium hypochlorite: NaClO Calcium sulfate: CaSO4 Strontium hydroxide: Sr(OH)2
Water has an unusually high...
Specific heat
What are the names of the ions Sn2+, Sb3+, and Te2-?
Tin (II), antimony, and telluride
What is the molecular geometry of AsCl3?
Trigonal pyramidal
The reaction HNO3(aq) + KOH(aq) → KNO3(aq) + H2O(l) is best classified as a(n)
acid-base neutralization reaction
Molarity is defined as
moles of solute per liter of solution
Order the four metric prefixes from smallest to largest
nano- < milli- < centi- < kilo-
What are the chemical symbols for TIN and GOLD
Sn; Au
The volume of 350 mL of gas at 25°C is decreased to 125 mL at a constant pressure, what is the final temperature of the gas?
-167°C *only negative number*
How many electrons are in the ion, CO3^2-
32
How many protons, electrons, and neutrons are in an atom of 90 Sr 38
38 p, 38 e, 52 n
All of the following are non metals except
Antimony
Based on the VSEPR theory, which should have the smallest XAX bond angle?
C
What is the molecular or chemical formula for butyric acid?
C4H8O2
Which molecule contains the most polar bonds?
CF4
The major source of Cl atoms in the stratosphere is from...
CFC's
Which of the following contains an atom that does NOT obey the octet rule?
CIF3
The principal cause of man-made ozone depletion in the stratosphere is due to...
Cl
Arrange the ions N3-, O2-, Mg2+, Na+, and F- in order of increasing ionic radius, starting with the smallest first
Mg2+, Na+, F-, O2-, N3-
Arrange the following spectral regions in order of increasing energy: infrared, microwave, ultraviolet, visible
Microwave< infrared< visible< ultraviolet
Which of the following have the same number of valence electrons?
N, As, Bi
Which bond should have the highest bond dissociation energy?
N=-N
The solid compound, NaHCO3, contains
Na2+ and CO3^2-
Know all ball-and-stick molecular model
O1= sp2 O2= sp3 C1= sp3 C2 = sp3 C3= sp2
Which of the following should be nonlinear?
Only II
Which of the following equations represents "Boyle's Law"
PV= k
A balanced net ionic equation for the reaction of Pb(NO3)2(aq) with NaI(aq)
Pb2+(aq) + 2 I-(aq) ➡️ PbI2(s) *shortest equation*
The ions ClO4-, ClO3-, ClO2-, and ClO- are named respectively
Perchlorate, chlorite, chlorite, and hypochlorite
As part of the calibration of a new laboratory balance, a 1.000-g mass is weighed with the following results: Trial Mass 1 1.201+-0.001 2 1.202+-0.001 3 1.200+-0.001 The Balance is:
Precise but in accurate
