When solid sodium hydroxide is dissolved in water which of the following species is not present in the solution?
A) NaOH(aq)
B) H2O(l)
C) OH-(aq)
D) None, they are all present.
A
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A. the export of citrus fruits B. a massive aquifer C. international call centers and computer programmers D. petroleum
About how often does a natural stream overflow its banks?
What will be an ideal response?
Many less developed countries fear the loss of folk culture because
A) they do not want to preserve traditional values. B) Western perspectives may become more dominant. C) popular culture devalues women. D) they want to avoid political disputes. E) Western clothing styles are less comfortable.
________ of an element are atoms containing different numbers of neutrons but the same number of protons.
A. Isotopes B. Varieties C. Ions D. Particles E. Classes