Why do certain solutions mix and others do not? What causes some to float and others to sink? 

Consider the reaction below:        4Fe + 3O2 –> 2Fe2O3   If 44.2 grams of oxygen react with an excess of iron, what mass of Fe2O3 can form?  (Fe2O3= 159.70 g/mol)

Normal average normal body temperature is 98.6 oC.  Three children have their temperature taken at a doctor’s office.  The first child has a temperature of 310 K.  The second child has a body temperature of 98.5 oC.  The third child has a body temperature of 38.3 oC.  Which child is running a fever (has a temperature greater than 100oF)?

Consider the following net ionic equation:  Mg + Fe2+ –> Mg2+ + Fe the species reduced is ___ and the species oxidized is ____

In this reaction, the excess reagent is ___. 2Al + 5Br2  –> 2AlBr3   +  2Br2  

The empirical formula for aluminum oxide is ___.  Make sure to leave no spaces.

When heated, zinc and sulfur combine to form a new compound, zinc sulfide, ZnS.  In this reaction, 

Which of the following is the BEST explanation as to why wearing a leotard, which is a skin-tight one-piece garment, might interfere with a woman’s ability to complete cognitive or behavioral tasks, such as taking a math test or giving an oral presentation?

How does colorism affect women in the United States?

37.  A nurse is caring for a client with Syndrome of Inappropriate Antidiuretic Hormone (SIADH). The client’s lab results show a serum sodium level of 130 mEq/L, a urine specific gravity of 1.035, and no peripheral edema. Which of the following should the nurse prioritize in the care plan?