Choose the best answers to fill in the blanks in the following passage.  Some answers may be used more than once, or not used at all. Chemical reactions may be classified into reaction ‘types.’  There are many such possible systems, but one way is to organize reactions according to whether materials are coming together, breaking down, or changing bonding partners.  In a 1)______________________ reaction, two or more materials combine to produce a single product.  In a 2)_____________________ reaction, one material is broken down into two or more products.  In a 3)___________________ reaction, one element is replaced for another in a compound.  Finally, in a 4)____________________reaction, two materials ‘swap’ bonding partners, to generate two new products.

Which of the following would be expected to dissolve into an aqueous solution to form an electrolyte?  (Note — the material must both 1) dissolve, and 2) produce an electrolyte once dissolved to be a valid answer.)  Choose all that may apply.

Which of the statements are true of the following reaction?  Choose all that apply. H2SO4(aq)  +  2 KOH(aq)  –>  K2SO4(aq)  +  2 H2O(aq)

Which of the following statements are true?  Choose all that may apply.

Match each reactant and product in the following reaction equation to the correct coefficient so that the equation balances.  Some coefficients may be used more than once, some not at all. ____ C4H10 + ____ O2 –> ____ CO2 + ____ H2O

40 questions, multiple choice and free response.  2 hours allowed. Be sure to have a calculator, periodic table, formula sheet, and scratch paper and pencil available before starting the test.  Good luck!

A certain railcar can hold up to [v] gallons of material.  An operator would like to load this railcar with material A, which has a density of [d] lbs/gal.  How many pounds of material A will the railcar be able to hold?  Be sure to express your answer to the correct number of significant digits.

A(n) _____________________ mixture would be expected to show uniform composition regardless of the position or volume of material sampled, a(n) _____________________ mixture would be expected to show varying composition depending on how and where it was sampled.

________________________ states that an atom is stabilized by having its highest occupied (valence) energy level filled.

Which subatomic particle — descriptor pairs are accurate?  Choose all that apply.