The metal extracted from cassiterite is

In which of the following is the oxidation number of nitrogen zero?

The separation of a mixture of calcium trioxocarbonate (lV) and sodium trioxocarbonate (IV) is most easily carried out by using the differences in their

When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is

What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na₂CO₃ = 106)