The major dissolved species in the Colorado River near Phoenix are given in mg/l in the table below.
a. Express the concentration of 
in the Colorado River in moles of 
per liter and in milligrams per liter as 
b. Calculate the total hardness, carbonate hardness and non-carbonate hardness for the Colorado River using the data in the table above.
What will be an ideal response?
a.
b.
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The ________ is the maternal tissue where the megaspore mother cell undergoes ________ to form the cells in the embryo sac.
Fill in the blank(s) with the appropriate word(s).
One of the major disadvantages of wood light-frame (WLF) construction is the shortening in the height of the structure. Give the causes for this phenomenon.
What will be an ideal response?
All insects go through a metamorphosis
Indicate whether the statement is true or false
Religious revivals of the Second Great Awakening resulted in
A. little increase in church membership. B. a stronger religious influence in many areas of American life including abolitionism and benevolent and charitable organizations. C. surprisingly few humanitarian reforms. D. greater attention to church history and doctrine. E. increase in enlightenment and rational religion.