Author Question: Water containing high concentrations of ________ cations is called hard water. A) Ca2+ B) Mg2+ ... (Read 138 times)

go.lag · **on:** Aug 27, 2018

Water containing high concentrations of ________ cations is called hard water.

A) Ca2+
B) Mg2+
C) Na+
D) K+
E) Ca2+ or Mg2+

Question 2

The ________ lattice is one of the five two-dimensional lattices in which the lattice vectors a and b are equal and the angle between them is 90.

A) square
B) rectangular
C) hexagonal
D) rhombic
E) oblique