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VSEPR
Organic Chem
Acid-Base
IMF's
Kibbles and Bits
100
In the Lewis structure for CH2Cl2, the central atom shares __________ electrons.
8
100
A molecule named propene has the formula?
C3H6
100
What is the [H+] when [OH-] = 8.1 x 10-5?
1.2 x 10-10 M
100
Surface tension in a liquid is due to the fact that a) surface molecules are pulled toward the interior b) liquids tend toward lowest energy c) PE is increased for molecules at the surface d) interior molecules are attracted in all directions e) all of the above
What is e) all of the above
100
Several brands of antacid tablets use aluminum hydroxide to neutralize excess acid. Al(OH)3(s) + 3 HCl(aq) > AlCl3(aq) + 3 H2O(l) [Molar masses: 78.01 36.46 133.4 18.02] What quantity of HCl, in grams, can a tablet with 0.750 g of Al(OH)3 consume? What quantity of water is produced?
What is .520g
200
What are the bond angles in NH3?
Slightly less than 109°
200
What is the name of a molecule with the formula, C5H10?
pentene
200
What is the [H+] when [OH-] = 3.3 x 10-9?
3.0 x 10-6 M
200
In which one of the following will dipole-dipole attractions play the most significant role as the intermolecular attraction? a) HCl d) H2O b) NaCl e) NH3 c) Kr
What is a) HCl
200
Balance the following equation: ___NH3 + ___O2 > ___NO2 + ___H2O The balanced equation shows that 1.00 mole of NH3 requires ___ mole(s) of O2. a)0.57 b)1.25 c)1.33 d) 1.75
What is d) 1.75
300
Which of the following is the largest ion? Rb+ Li+ Cs+ K+ Na+
Cs+
300
A molecule that fits the pattern, CnH2n+2, is a?
alkane
300
What is the [H+] in a 0.0025 M HCl solution?
2.5 x 10-3 M
300
With which type of substances do London dispersion forces play the most significant role? a) polar moleculesd) non-polar molecules b) metals e) network compounds c) ionic compounds
What is d) non-polar molecules
300
Balance the following equation with the SMALLEST WHOLE NUMBER COEFFICIENTS possible. Select the number that is the sum of the coefficients in the balanced equation: ___KClO3 > ___KCl + ___O2 a)5 b)6 c) 7 d)8
What is c)7
400
How many unshared electron pairs must be included in the Lewis structure for water, H2O?
2
400
How many π bonds are present in propyne?
2
400
A solution in which [H+] = 10-8 has a pH of ___ and is _______.
8, basic
400
Which one of the following is linked with the correct intermolecular force of attraction? a) NH3 dipole-dipole b) AlH3 London dispersion forces c) H2 hydrogen bonding d) C2H4 covalent bonding e) HCl ionic
What is b) AlH3 London dispersion forces
400
In each of the following reactions, decide which reactant is oxidized and which is reduced. Give the change in oxidation states. Ca(s) + 2 HCl(aq) > CaCl2(aq) + H2(g)
What is Ca 0> +2 and H2 goes from +1 to 0
500
Nitrogen triiodide, NI3, is an unstable molecule that is used as a contact explosive. Its molecular structure is octahedral pyramidal, tetrahedral, none of these or square planar ?
pyramidal
500
An amine is characterized by what functional group?
R-NH2
500
What is the concentration of OCl- in a 0.60 M solution of HOCl? Ka = 3.1 x 10-8.
1.4 x 10-4 M
500
What type of solid(s) can contain covalent bonds? a) molecular d) network b) metallic e) all but “b” c) ionic
What is c) ionic
500
For which reaction do you expect delta S to be negative? (A) 2C(s) + O2(g) > 2CO(g) (B) Br2(s) > Br2(l) (C) H2O(l, 25 °C) > H2O(l, 50 °C) (D) Cl2(g) + 2HI(g) > I2(s) + 2HCl(g)
What is D) If S is negative then the reaction in more ordered! (Three moles of gas turning into one mole of solid and two moles of gas is getting less random.)