Author Question: Which of the following is insoluble in water at 25 C? A) Mg3(PO4)2 B) Na2S C) (NH4)2CO3 D) ... (Read 101 times)

melly21297 · **on:** Aug 27, 2018

Which of the following is insoluble in water at 25 C?

A) Mg3(PO4)2
B) Na2S
C) (NH4)2CO3
D) Ca(OH)2
E) Ba(C2H3O2)2

Question 2

Boric acid condenses to form tetraboric acid according to the equation ________.

A) 4H3BO3 (s) 2H2B2O7 (s) + 3H2O (g)
B) 2H3BO3 (s) HB2O2 (s) + 4H2O (g)
C) 4H3BO3 (s) HB4O8 (s) + 4H2O (g)
D) 2H3BO3 (s) H2B4O7 (s) + 3H2O (g)
E) 4H3BO3 (s) H2B4O7 (s) + 5H2O (g)

Question 3

How many total electrons are in the Li+ ion?

A) 2
B) 3
C) 4
D) 7
E) 8

Question 4

Crystalline solids differ from amorphous solids in that crystalline solids have ________.

A) appreciable intermolecular attractive forces
B) a long-range repeating pattern of atoms, molecules, or ions
C) atoms, molecules, or ions that are close together
D) much larger atoms, molecules, or ions
E) no orderly structure

6ana001 · **Reply #1 on:** Aug 27, 2018

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