Water containing high concentrations of ________ cations is ...

[go.lag]

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

[debra928]

Answer to Question 1

E

Answer to Question 2

A

[go.lag]

Thanks for the timely response, appreciate it

[steff9894]

Excellent