Water can combine with iron oxide to form ________.
A. hydrogen ions
B. silica
C. limonite
D. galena
E. calcium, sodium, or potassium ions
Answer: C
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Stratigraphy is the study of the deposition and layering of sediments over time
Indicate whether the statement is true or false
For the reaction 2C ? A + B, 0.01 mol of A is formed during the first 15 seconds of the reaction. Assuming that the rate of reaction remains constant for two minutes, which of the following statements is true?
A) After 2 minutes 0.08 moles of B were produced. B) After 2 minutes 0.08 moles of C were consumed. C) both a and b D) neither a nor b
As temperature increases, the amount of energy available for evaporation
A) increases. B) decreases. C) remains constant.
The LD50 indicates the ___.
a. amount of toxicant it takes to kill half the population b. lowest dose that kills 50 out of 1000 members of the population c. lowest dose required to cure half the population d. lowest dose that kills any member of the population