Question

For each of the following reactions, give the balanced equation for the reaction and state the meaning of the equation in terms of the numbers of individual molecules and in terms of moles of molecules.

a. MnO2(s) + Al(s)-Mn(s) + Al2O3(s)
b. B203(s) + CaF2(s)-BF3(g) + CaO(s)
c. NO2(g) + H2O)> HNO;(aq) + NO(g)
d. C6H6(g) + H2(g)â C6H12(g) 12)

Answer 1

a. 3MnO2 + 4Al —> 3Mn+ 2Al2O3

3 moles of MnO2 required 4 moles of Al to produce 3 moles of Mn and 2moles of 2Al2O3

b. B203 + 3CaF2 —> 2BF3 + 3CaO

1mole of B203 requires 3 moles of CaF2 to produce 2moles of BF3 and 3 moles of CaO

c. 3NO2 + H2O —> 2HNO3 + NO

3 moles of NO2 requires 1mole of H2O to produce 2moles of HNO3 and 1mole of NO

d. C6H6 + 3H2 —> C6H12

1mole of C6H6 requires 3 moles of H2 to produce 1mole of C6H12