Mass Flashcards
1
Q
Why does mass appear to increase or decrease in reactions
A
In reactions, mass sometimes appears to decrease because oxygen or any other form of gas escapes from the mass of the other reactants in the experiment.
Mass sometimes appears to increase because oxygen from the atmosphere is added and oxygen has a mass. This mass is added to the mass of the other products increasing the overall mass.
2
Q
State symbols
A
Physical state of a substance
3
Q
S
A
Solid
4
Q
L
A
Liquid
5
Q
G
A
Gas
6
Q
Aq
A
Aqueous (dissolved in water)
7
Q
Conservation of mass
A
The law of the conservation of mass is that mass cannot be created or destroyed. Mass is always conserved but might be different at the end of an equation than the beginning.