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Exercises 8.6 Exercises
1.
Write the missing number in the following equations:
\(\displaystyle 4NH_3 + 3O_2 → 2N_2 +[...]H_2O \)
\(\displaystyle 2HNO_3 + 3H_2S → 2NO +[...]H_2 +3S \)
\(\displaystyle Ca+ [...]H_2O → Ca(OH)_2 +H_2\)
\(\displaystyle 2Al + [...]H_2SO_4 → Al_2(SO_4)_3 + 3H_2 \)
2.
Which of the following equations are balanced?
\(\displaystyle 6Na + Fe_2O_3 → 2Fe + 3Na_2O \)
\(\displaystyle MnO + 4HCl → MnCl_2 + 2H_2O +Cl_2 \)
\(\displaystyle H_2CO_3 → H_2O +CO_2 \)
\(\displaystyle Zn + H_2SO_4 → H_2 + ZnSO_4 \)
3.
Name these compounds:
\(\displaystyle PbO\)
\(\displaystyle BaH_2 \)
\(\displaystyle CuBr_2\)
\(\displaystyle KOH\)
\(\displaystyle Ca_3(PO_4)_2\)
\(\displaystyle Al_2(SO_4)_3\)
4.
Write the chemical formula for these compounds:
Hydrogen iodide
Dinitrogen tetroxide
Manganese chloride
Ferric oxide
Ferrous oxide
Calcium carbonate
5.
Select the correct choice: A halogen atom
has one electron in its outermost orbit
has two electron in its outermost orbit
has filled outer shell
lacks one electron of having a filled outer shell
6.
Select the correct choice: An atom that loses its outer electron or electrons is generally
an active metal
an active nonmetal
an inactive metal
an inactive nonmetal
