Chemistry
State the difference between the following:
(a) 2H and H2
(b) H2O and 3Н2О ?
Answer
(a) 2H represents two atoms of hydrogen while H2 represents one molecule of hydrogen.
(b) H2O indicates that water molecule is formed by the combination of two elements i.e., Hydrogen and Oxygen. The number of hydrogen atom is two and that of oxygen atom is one.
If we write 3Н2О it represents three molecules of water. It contains six atoms of hydrogen and three atoms of oxygen.
Related Questions
The combining power of magnesium and oxygen is the same, i.e. 2. What will be the molecular formula of magnesium oxide ?
- Mg2O2
- MgO2
- Mg2O
- MgO
Define:
(a) Atom
(b) Molecule
(c) Atomicity
(d) Formula
Write the molecular formulae of compounds calcium oxide, hydrogen sulphide, lead sulphide, zinc oxide and carbon dioxide.
Give two examples each of compounds existing in the following states:
(a) Solid
(b) Liquid
(c) Gaseous