Overview
1.) Given the balanced equation :
2 Na + 2H2O --> 2X + H2
What is the correct formula for the product represented by letter X?
2.) Given the reaction :
2 X + Cr2O3 --> X2O3 + 2Cr
The metal represented by X in the equation could be ________ with the oxidation number of __________
3.)Which metal can replace Cr in Cr2O3 ?
4.) Given the equation:
X + CL2 --> C2H5CL + HCL
Which molecule is represented by X?
5.) Given the incomplete reaction :
4 Fe + 3O2 --> 2 X
Which compound is represented by X?
6.) Given the balanced equation with an unknown compound represented by X
2 C2H6 + 7O2 --> 4CO2 + 6 X
What is the formula of the missing product?
7.) Given the unbalanced equation
KMnO4 + HCL --> KCL + MnCL2 + CL2 + H2O
What is the coefficient of H2O when the chemical equation is correctly balanced?
8.) Given the following unbalanced equation :
MnO2 + HCL --> MnCL2 + H2O + CL2
When the equation is correctly balanced using the smallest whole-number coefficients, the coefficient of HCL is ?
9.) Given the unbalanced equation
CaSO4 + ALCL3 --> AL2(SO4)3 + CaCL2
What is the coefficient of Al2(SO4)3when the equation is completely balanced using the smallest whole-number coefficient?
10.) Given the unbalanced chemical equation:
Ag2S + 8HNO3 --> AgNO3 + 2NO + S + H2O
What is the numerical coefficient of Ag2S when the equation is completely balanced using the smallest-whole numbers?