Which of the following choices best classifies the following reaction:  Na2S+   Pb(NO3)2    PbS  +  2 Na(NO3) a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

Hydrogen bonding is a special type of dipolar force that occurs when hydrogen is bonded to what 3 possible elements? (Use appropriate symbols for the elements. Use commas to separate the symbols)

Which of the following represents the correct order of increasing inter-molecular strength?

Which of the following electronic changes will cause a Group VIA (16) element to achieve a noble gas configuration?

Which of the following choices best classifies the following reaction:  Mg   +    2 HBr     MgBr2   +  H2 a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

Balance the equation below by placing the correct coefficients in the blanks. Your response should list the coefficients in order from left to right, separated only by commas; no spaces. If no coefficient belongs in a blank, represent it with a “1”. For example the equation 2 H2O  → 2 H2 +O2 would be represented as 2,2,1. ____ Rb(OH)  + ____H3(PO4) →  ____Rb3 (PO4) + ____H2O  

A reaction in which a single substance is broken down into two or more simpler substances is a:

What is the freezing point of water in °C?

Determine the oxidation number of the underlined element in the following compound. Be sure to indicate if the oxidation number is positive or negative. NaNO2

Increasing the pressure of a fixed amount of gas at constant temperature has what effect on the volume of the gas? (Response should be one of the following: increases, decreases or no effect)