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WEEK 5
TOPIC: STOICHIOMETRY
- I. Unit of quantities: length, mass volume etc.
- Basic concepts: mole, molar quantities, molality, standard temperature and pressure (s.t.p.)
- Calculations involving mass and volume
- More calculations on mass and volume relationship.
PERIOD 1: S.I. UNIT OF QUANTITIES: LENGTH, MASS VOLUME ETC
S.I. UNITS OF QUANTITIES.
S.I. unit means international system [used to describe units of measurements from French ‘system international’] S.I. units
For example
| QUANTITY | SYMBOL | UNITS |
| Length | L | m, cm |
| Mass | M | g or kg |
| Molar mass | M | gmol-1 |
| Volume | V | cm3, dm3 |
| Amount | N | mol |
| Molar concentration | L | mol.dm-3 |
| Mass concentration | P | gdm-3 |
| Avogadro’s law | L | mol-1 |
| Avogadro’s number | N | —— |
| N.B molar mass | M | g.mol-1 |
Relationship between quantities
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