chemistry Flashcards
1
Q
How can you obtain drinking water from muddy water?
A
Filtrate then distil
2
Q
How can you separate petrol from crude oil
A
fractional distillation
3
Q
3 types of bonds
A
Ionic, covalent, metallic
4
Q
What do atoms never do?
A
gain or lose protons
5
Q
Type of elements that generally form negative ions
A
non-metals
6
Q
Type of elements that generally form positive ions
A
metals
7
Q
What does empirical mean?
A
The simplest
8
Q
Methane chemical formula
A
CH4
9
Q
Why does chlorine have two molecules?
A
Because Chlorine is a non-metal and they are mostly molecular.
10
Q
Sulfuric acid formula
A
H2SO4
11
Q
Why is a carbonate atom 2-?
A
Because it contains a carbon atom and three oxygen atoms
12
Q
The law of conservation of mass
A
Mass can not be created or destroyed, can only turn from one form to the other.
