Consider the following equation.  2 H2 (g) + O2 (g)  –> 2 H2O (g)   If 3.0 moles of H2 (g) react fully with oxygen how many moles of water will be made?

A gas sample in a container has a pressure of 2.4 atmospheres at a temperature of 0 °C.  If the volume of the gas doesn’t change, what is the pressure after the system is heated to 100 °C?

What is the frequency of a photon of light with a wavelength of 615 nm?

As the temperature rises, the solubility of all gases in water ___________________. 

.  The driving force of a neutralization reaction is the formation of ___.

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

A 25.0 mL sample of HBr is neutralized by reaction with 20.0 mL of 3.00 M KOH.  What is the concentration of HBr is the unknown sample? *hint- find the concentration of the base first.

The following reaction is an example of an ___ reaction. 2 N2(g) + O2(g) → 2 N2O (g)             ΔHrxn = +163.2 kJ

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)

A 1.0 gram sample of a candy bar was placed in a bomb calorimeter with a heat capacity of 3.54 kcal/°C. The sample was completely burned, causing the temperature of the calorimeter to rise by 1.36 °C.   How many kilocalories of energy were stored in the candy bar?    Make sure to show all your work- No work = no credit