Measuring Mass 3.1.2 Flashcards
1
Q
How can products sometimes weigh less than reactants?
A
If one or more of the products are a gas, they can escape into the atmosphere.
2
Q
When metals corrode the mass will appear to…
A
Increase, because of the mass of the oxygen atoms.
3
Q
Why is it important to repeat measurements several times in an experiment and calculate an average?
A
To reduce uncertainty from measuring instruments.
4
Q
Molecular formula shows…
A
Actual ratio.
Eg: C6H12O6
5
Q
Empirical formula shows…
A
Simplified ratio.
Eg CH2O
