When cobalt(II) oxide, CoO, is heated in air an oxide with the formula Co3O4 is formed.
Balance the equation for this reaction.
…....... CoO + O2 → 2Co3O4
Sulfuric acid is a compound.
The formula of sulfuric acid is H2SO4.
Complete Table 1.1 to calculate the relative molecular mass of sulfuric acid.
Table 1.1
atom | number of atoms | relative atomic mass |
|
hydrogen | 2 | 1 | 2 × 1 = 2 |
sulfur |
|
|
|
oxygen |
|
|
|
relative molecular mass = .............................
Hydrogen is a fuel which can be obtained from water by electrolysis.
Refinery gas and petrol are fuels obtained by the fractional distillation of petroleum.
Complete the equation for the burning of hydrogen.
.......... H2 (g) + O2 (g) → ..........H2O (l)
State the meaning of (g) and (l).
(g):
(l):
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