Determine the reducing agent in the following reaction. 2 Li(s) + Fe(C2H3O2)2(aq) → 2 LiC2H3O2(aq) + Fe(s)
A) O
B) H
C) C
D) Fe
E) Li
Answer: E. Lithium is the substance that is losing its electrons and causing the reaction to be reduced
Clicker 7
Audio 0:26:39.117323
Draw the appropriate molecular orbital diagram and determine which of the following are paramagnetic.
A) B2^2+
B) B2^2-
C) N2^2+
D) C2^2-
E) B2
Answer: E. Looking for six or twelve valence electrons
Clicker 8
Audio 0:30:33.281519
How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol
4KNO3(s) -> 2K2O(s) + 2N2(g) + 5O2(g)
A) 0.290 mol N2
B) 0.580 mol N2
C) 18.5 mol N2
D) 0.724 mol N2
E) 1.73 mol N2
Answer: A
Clicker 9
Audio 0:34:13.545160
According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed? (S: 32.07, H: 1.0079, O: 15.999)
2H2S(g) + SO2(g) -> 3 S(s) + 2H2O
A) 99.8 g S
B) 66.6 g S
C) 56.1 g S
D) 44.4 g S
E) 14.0 g S
Clicker 10
Audio 0:37:15.066241
Determine the theoretical yield of HCl if 60.0 g of BCl3 and 37.5 g of H2O are reacted according to the following balanced reaction. (molar mass of BCl3 = 117.16 g/mol, B: 10.81, Cl:35.45, O:15.999, H:1.0079)
BCl3(g) + 3 H2O(l) → H3BO3(s) + 3 HCl(g)
A) 75.9 g HCl
B) 132 g HCl
C) 187 g HCl
D) 56.0 g HCl
E) 25.3 g HCl
Clicker 11
Audio 0:45:58.730799
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:
CaO(s) + H2O(l) → Ca(OH)2(s)
A 5.00-g sample of CaO is reacted with 4.83 g of H2O. How many grams of water remain after the reaction is complete? (Ca:40.08, O:15.999, H:1.0079)