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Calcium carbide  reacts with water to produce acetylene : Production of 13g of  requires consumption of __________ g of .

Coral reefs can be found on the southeast coast of the United States but not at similar latitudes on the southwest coast. Differences in which of the following most likely account for this?

Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia:            A 7.1-g sample of  requires __________ g of  for complete reaction.

Where did the Sumerians build their largest temples?

Sulfur and oxygen react in a combination reaction to produce sulfur trioxide, an environmental pollutant: In a particular experiment, the reaction of 1.0 g S with 1.0 g  produced 0.80 g of .  The % yield in this experiment is __________.

All of the following compounds are soluble except

When the following equation is balanced, the coefficient of dinitrogen pentoxide is __________.  

In an acid-base neutralization reaction 23.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution. What is the concentration of the H2SO4 solution?

Consider two forests: one is an undisturbed old-growth forest, and the other has recently been logged. In which forest are species likely to experience exponential growth, and why?

Describe Germanic society in the early Middle Ages. What impact did the traditions, beliefs, and laws of Germanic peoples have on the subsequent development of European civilization? How were the Germans affected by Christianity?