Given the unbalanced total ionic equation below, which of the following is a spectator that would be removed in the corresponding net ionic equation?   HCl(aq)  +  Ca(OH)2(aq)  –>  CaCl2(aq)  +  H2O(l)

A certain data set has low accuracy, but high precision.  Which of the following statements about error is most consistent with the data set?

How much heat is required to adjust the temperature of 91.2 grams of copper from -32.2°C to 315°C?

Provide the missing systematic chemical name or chemical formula for the following substances.  Spelling counts.  When entering formulas, all numbers will be assumed to be subscripts.  Include states of matter such as (g) and (aq) ONLY when the state of matter affects the name of the compound.  (1 pt each) Problem # Systematic Chemical Name Chemical Formula A S3O5 B stannic permanganate C FeCl2 

What is the molar mass of a gas that has a density of 8.12 g/L at 412°C and 0.750 atm?

An unknown compound contains 57.14% carbon, 6.16% hydrogen, 9.52% nitrogen, and the rest oxygen, by mass.  What is the empirical formula of the compound?

What volume of 0.777 M KOH is needed to neutralize 1.56 L of 4.12 M HCl?

Which of the following metals will react with an aqueous iron (II) nitrate solution in a single displacement reaction?

You dilute 215 mL of a 0.361 M sulfuric acid solution to a final volume of 816 mL.  What is the molarity of H+ in the diluted solution?

Write the balanced molecular equations, including states of matter, for each of the following situations if a reaction is expected to occur.  If no reaction occurs, write “NR” (no reaction).   A.   (3 pts)  Aqueous magnesium acetate and aqueous potassium carbonate are combined together. B.   (3 pts)  A gold bar is dropped into a beaker of hydrochloric acid. C.   (3 pts)  Liquid hexane is combusted completely.