For the following acid-base reaction, identify which salt is formed. HCl + NaOH ? ???? + H2O
A. H3OCl
B. NaOH2Cl
C. NaOH2
D. NaCl
E. none of the above
Answer: D
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Suppose you observe lenticular clouds that appear to be motionless. Is the air in the vicinity of the cloud motionless? Explain.
What will be an ideal response?
A rock outcrop exposes a layer of obsidian overlain by volcanic ash and a layer with fragments of lapilli. What rock composition and eruptive type fits this description?
A) andesite and basalt erupted from a stratovolcano B) basalt erupted from a cinder cone C) basalt flows and interbedded andesite deposited on a shield volcano D) rhyolite erupted in violent pyroclastic eruptions
Judge the following sentence according to the criteria given below: Diatoms need strong sunlight and are found only within the upper, sunlit surface waters of the ocean BECAUSE they provide most of the silica in biogenous ooze
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
Most spillways below dams are designed to withstand the
A. 1,000-year flood. B. 100,000-year flood. C. 10,000-year flood. D. 100-year flood.