In which reaction does the oxidation number of hydrogen change?
A) HCl (aq) + NaOH (aq) NaCl (aq) + H2O (l)
B) 2Na (s) + 2H2O (l) 2NaOH (aq) + H2 (g)
C) CaO (s) + H2O (l) Ca(OH)2 (s)
D) 2HClO4 (aq) + CaCO3 (s) Ca(ClO4)2 (aq) + H2O (l) + CO2 (g)
E) SO2 (g) + H2O (l) H2SO3 (aq)
Question 2
CsCl crystallizes in a unit cell that contains a Cs+ ion at the center of a cube and a Cl- ion at each corner. The unit cell of CsCl is ________.
A) close packed
B) body-centered cubic
C) face-centered cubic
D) amorphous
E) primitive cubic
Question 3
Neurotransmitters released from a presynaptic vesicle will fit into one or more receptor sites on a postsynaptic cell.
Indicate whether the statement is true or false