Introduction to formulae Flashcards
1
Q
What does the letters represent
In a chemical formula ?
A
The letters represent the elements present.
2
Q
What does the numbers represent in a chemical formula?
A
The numbers shows how many of the preceding element is present.
3
Q
Formula for oxygen?
A
O2
4
Q
Formula for water ?
A
H2O
5
Q
Formula for carbon?
A
CO2
6
Q
What is methane made of?
A
Carbon+Hydrogen
7
Q
Formula for methane?
A
CH4
8
Q
Formula for chlorine?
A
HCI
