Strong thunderstorms sometimes reach the ________
Fill in the blank(s) with the appropriate word(s).
Answer: stratosphere (or tropopause)
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Compare the world's most populous cities to the most important business service centers
What will be an ideal response?
Catalán is most closely associated with which Spanish city?
A) Madrid B) Cordoba C) Valencia D) Barcelona E) Seville
Sodium sulfite, Na2SO3(aq), is added to wine as an antioxidant since it reacts with the oxygen of the air to form sodium sulfate, Na2SO4(aq). Which of the following is the balanced equation for this reaction?
A) Na2SO3(aq) + O(g) ? Na2SO4(aq) B) Na2SO3(aq) + 2 O(g) ? Na2SO4(aq) C) 2 Na2SO3(aq) + O2(g) ? 2 Na2SO4(aq) D) Na2SO3(aq) + O2(g) ? Na2SO4(aq)
Calcite (calcium carbonate) is the most common non-silicate mineral in the Earth's crust.
Answer the following statement true (T) or false (F)