The bond angles in a tetrahedral molecule are ________ degrees.
A) 109.5
B) 120
C) 90
D) 45
E) <45
Question 2
What is the molar solubility of calcium carbonate ( CaCO3 ) in water? The solubility-product constant for CaCO3 is 4.5 10-9 at 25 C.
A) 2.3 10-9
B) 9.0 10-9
C) 8.35
D) 9.5 10-5
E) 6.7 10-5