What describes the measurement of the concentration of hydrogen ions compared to the concentration of hydroxide ions in a solution?
A. ionization
B. pH
C. alkalinity
D. covalent bonding
E. isotope
Answer: B
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The first agricultural revolution set the preconditions for early world-empires by
A) enabling an increase in population densities & trade between minisystems. B) introducing warfare to the countryside. C) introducing colonialism and imperialism. D) highlighting the benefits of import substitution and comparative advantage. E) both introducing warfare to the countryside and introducing colonialism and imperialism.
Which of the following statements describes how air molecules make the sky blue?
A. They selectively absorb blue light. B. They selectively disperse blue light. C. They selectively scatter blue light. D. They selectively diffract blue light.
the value of the environmental lapse rate is ________ C degrees per kilometer.
3.5 4.5 5.5 6.5
The exchange value of commodities, as posited by Marx, is their qualitative, subjective dimension
Indicate whether the statement is true or false