chemistry 1 Flashcards
1
Q
How to obtain a pure, dry sample of sodium chloride from a mixture of solid sodium chloride and sand
A
Shake the mixture with water, filter and evaporate the filtrate
2
Q
How to test for water purity
A
If it freezes at EXACTLY 0c then it is pure
3
Q
Noble gasses atoms each have:
A
a stable arrangement of electrons
4
Q
How to separate nitrogen from liquid air
A
fractional distilation
5
Q
How to separate pure ethanol from a mixture of ethanol and sand
A
filtration
6
Q
Non metals form what type of compound
A
covalent compound
7
Q
an element contains how many types of atoms
A
One type of atom
