Reactions can be characterized as combination, decomposition…

Reactions can be characterized as combination, decomposition, single-displacement, or double-displacement. Categorize the following reactions. 2H2 + O2 –> 2H2O   [red23]   2KOH + H2SO4 –>K2SO4 + 2H2O   [red25]   Fe +  2H2O  –> Fe(OH)2 + H2   [red24]   CaCO3 –> CaO  + CO2      [red26]                  

An irregularly shaped object weighs 68 grams. A researcher w…

An irregularly shaped object weighs 68 grams. A researcher wants to know its density so she takes a graduated cylinder and fills it to 50 ml. When the object is placed in the cylinder the water volume increases to 88 ml. What is the density of the object. Give the answer to 1 decimal place. [red38] g/ml