Chemistry Final Exam

Chemistry: Final Exam Review
Ammonia, acid or base? - ansBase (drain cleaners are bases).



Are noble gases reactive? - ansNO! They have a full octet of electrons. They do not want to react with anything.



Balance the equation:



C3H8 + O2 ---> CO2 + H2O - ans1 C3H8 + 3 O2 ---> 5 CO2 + 4 H2O



Balance the equation:



H2 + O2 -----> H20 - ans2 H2 + O2 ----> 2 H20



C2H4 + 3 O2 ----> 2 CO2 + 2 H2O



If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced? - ans141.4
g CO2



Define activation energy. - ansThe energy required to start a chemical reaction.



Define equilibrium. - ansEquilibrium is established when the rate of the forward reaction is equal to the rate of
the reverse reaction.



Define neutralization. - ansWhen an acid reacts with a base to form water and a salt. pH = 7.



Define Reaction Rate - ansThe decrease in concentration of reactants or the increase in concentration of
products with time.

, Define solute. - ansThe part of the solution in less amount.



Define solvent. - ansThe part of the solution in greater amount. (HINT: solvent is a bigger word than solute)



Define specific heat capacity. - ansThe amount of heat required to raise 1g of a substance to 1 degrees Celsius.



Define STP. - ansPressure = 1 atm or 101.3 kPa

Temperature = 0 degrees Celsius or 273 K



Draw the Lewis Dot Structure for an atom of Neon in its ground state. - ans..

: Ne :

..



Draw the Lewis Dot Structure for Carbon. - ans.

.C.

.



Draw the Lewis Dot Structure for Fluorine. - ans.

:F:

..



Equal volumes of gases at STP have equal _____. - ansMoles.



Feels slippery; acid or base? - ansBase.



Find the molar mass of Al2(SO4)3 - ans342 g/mol