Which element is reduced in the following reaction?  Zn  +   2 HCl   →  ZnCl2   +  H2

The correct name for the molecular compound N2O3 is

Which of the following choices best classifies the following reaction: NaHCO3 → Na2CO3 + H2O + CO a. combination b. single replacement c. decomposition d. double replacement 

In a oxidation-reduction reaction, the reducing agent is:

Which of the following choices best classifies the following reaction:  MgO+SO2  Mg(SO3)a. combination b. single replacement c.  decomposition d. double replacement  e. redox f.  nonredox         

Use the factor-label method to solve the following stoichiometry problem.   Given the following equation: 1 C3H8  +  5 O2    3 CO2  +  4 H2O If 25.7 g of CO2 are produced from this reaction, how many moles of H2O are also produced? To receive full credit:  You must use the factor unit method and the math equation editor in the toolbar to insert the stoichiometric calculation.  Be sure to include proper units and the final answer! Or, show your work on a separate sheet of paper and submit in the Unit 2 Exam pictures dropbox after completing the Exam. 

Which of the following choices best classifies the following reaction:  2 H2O  +  O2  2 H2O2 a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

Which one of the formulas for an ionic compound is incorrect? Al3O2 Li2S NaF CaS MgCl2

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. ____O2 + ____As2S3  +  

Which one of the formulas for an ionic compound is incorrect? Al2S3 NaS LiCl MgO K3N